{"as_of":"2026-08-09T23:22:00Z","caps":{"database_statements":6,"inbound":100,"outbound":100},"context_digest":"sha256:6fa9e9f3b361d7cd8050b03fb933b8f046370a7e4de44334854b4aa3f3df7ff7","coverage":[{"denominator":43,"lane":"reference_resolution","note":"Typed states for the displayed outbound observations.","records_observed":43,"source":"paper_references, paper_reference_links","source_observed_at":"2026-08-04T06:47:42.064475Z","state":"measured"},{"denominator":44,"lane":"standing_notices","note":"One-hop event checks from named stored sources.","records_observed":44,"source":"scholarly_work_events, retraction_status_cache","source_observed_at":"2026-08-09T06:31:02.800959+00:00","state":"measured"},{"denominator":1,"lane":"inbound_itemization","note":"Pith citing papers itemized under the disclosed page cap.","records_observed":1,"source":"paper_references, paper_reference_links","source_observed_at":"2026-07-01T02:06:11.564222Z","state":"measured"},{"denominator":1,"lane":"external_citation_measurements","note":"A source-named dated measurement, never combined with another source.","records_observed":0,"source":"arxiv_reference","source_observed_at":"2026-07-01T12:25:43.717710Z","state":"measured"}],"external_citation_measurements":[],"inbound":[{"citation":{"cited_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"cited_work":{"arxiv_id":"2601.04139","doi":null,"metadata_source":"arxiv_reference","pith_arxiv_id":"2601.04139","snapshot_observed_at":"2026-08-04T03:26:30.578377Z","title":"Oglialoro, G","venue":null,"work_id":"30b95cd0-887d-485d-a43f-26cce72ce96a","year":2026},"citing_paper":{"arxiv_id":"2606.30761","last_updated":"2026-06-29T18:01:11Z","snapshot_observed_at":"2026-07-07T00:04:34.491408Z","submitted_at":"2026-06-29T18:01:11Z","title":"Improving the loss threshold for quantum advantage in photonic sensors by complete photon counting","version":1},"reference_index":33,"source":"pdf_text","source_observed_at":"2026-07-01T02:06:11.564222Z"},"links":{"cited_paper":"/paper/2601.04139","citing_paper":"/paper/2606.30761"},"observation_digest":"sha256:52e8e4bb3be856936fdeb293d21c32b6ba9b9573c1014ab9b050bf4a56d77040","observation_id":"995b39ae-5096-4c96-b525-e457be87020d","resolution":{"observed_at":"2026-08-04T03:26:30.578377Z","resolver_source":"arxiv_id","status":"verified_exact"},"standing_notice":{"events":[],"observation":"No event found in the named queried sources as of 2026-08-09T06:31:02.800959+00:00.","reason":null,"source_receipts":[{"observed_at":"2026-08-09T06:31:02.800959+00:00","source":"crossref"},{"observed_at":"2026-08-09T06:30:57.326959+00:00","source":"retraction_watch"}],"state":"measured"}}],"links":{"evidence":"/evidence","html":"/paper/2601.04139/citation-record","integrity":"/paper/2601.04139/integrity","json":"/paper/2601.04139/citation-record.json","paper":"/paper/2601.04139"},"outbound":[{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:38.181476Z","title":"Nonlinearin- terferometers in quantum optics","venue":null,"work_id":null,"year":2016},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":1,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:38.181476Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:c1f73111d50f2ff268312e66ba625b35924c665715bdecae82c14c7fa55a502a","observation_id":"7d4d336b-879a-4fb6-891b-a907f9e04e21","resolution":{"observed_at":"2026-08-04T06:47:38.181476Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:38.270367Z","title":"SU(2) and SU(1,1) interferometers","venue":null,"work_id":null,"year":1986},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":2,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:38.270367Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:bb9594e6b742aabcf99b01789094429c879ce4e10b8536ed4eb003849888efba","observation_id":"5759a163-678b-4c1b-93d3-04b14f2d27e9","resolution":{"observed_at":"2026-08-04T06:47:38.270367Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:38.351504Z","title":"In- duced coherence and indistinguishability in optical interference","venue":null,"work_id":null,"year":1991},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":3,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:38.351504Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:9bb2e264b4900863f3d2b06d4b731d90915818113a31d7f591631f49de619c11","observation_id":"b5071bdb-2cde-4725-86a8-86596e25c9f4","resolution":{"observed_at":"2026-08-04T06:47:38.351504Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:38.443222Z","title":"Quantum in- distinguishability by path identity and with undetected photons","venue":null,"work_id":null,"year":2022},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":4,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:38.443222Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:702a1185b80a44fa4f5fbae358e5204baecb2ac430adc1367341e1283d1737cc","observation_id":"b303209a-d02f-4cac-8551-b814825832f3","resolution":{"observed_at":"2026-08-04T06:47:38.443222Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:38.533390Z","title":"Non- linear interferometry: A new approach for imaging and sensing","venue":null,"work_id":null,"year":2024},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":5,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:38.533390Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:51481786ca162ab79ebdfd6b864851aa35ebc322e5c738098b5d7e9c5e74de03","observation_id":"f19ba18f-65f8-47bd-9ebb-f00828db2cd2","resolution":{"observed_at":"2026-08-04T06:47:38.533390Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:38.609908Z","title":"Quantum imaging with undetected photons","venue":null,"work_id":null,"year":2014},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":6,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:38.609908Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:e042ba780c7ca49d8f0cccdf1357069d73e7c06f797ded6672bd57c3c50cb8fd","observation_id":"a7c5fdfe-b6aa-49c5-885f-ea1bd9e47d01","resolution":{"observed_at":"2026-08-04T06:47:38.609908Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:38.689293Z","title":"Experimental quantum imaging distilla- tion with undetected light","venue":null,"work_id":null,"year":2023},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":7,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:38.689293Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:17f4b0b7a8eeae25521de127a82b3168c9d70611ee93bc8d714d4127baf0dabf","observation_id":"d6a7c938-d51c-461e-b53e-648efa2e4b6e","resolution":{"observed_at":"2026-08-04T06:47:38.689293Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:38.749131Z","title":"Optical section- ing in induced coherence tomography with frequency-entangled photons","venue":null,"work_id":null,"year":2018},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":8,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:38.749131Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:b247e39757c9f0748bed1d1df7d2ce5764efb9b60e8eb89e7c4ff17028e731fa","observation_id":"e1038698-8c5a-405e-9af3-470deb01a836","resolution":{"observed_at":"2026-08-04T06:47:38.749131Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:38.807614Z","title":"Phase sensitivity of gain-unbalanced nonlinear interferometers","venue":null,"work_id":null,"year":2017},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":9,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:38.807614Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:8379cc9f0703e0f1f414455f6e9cf832fd955ca95557f1e2c703b977b19f4719","observation_id":"40ea1529-2d72-496a-acf7-84d21fcba2b9","resolution":{"observed_at":"2026-08-04T06:47:38.807614Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:38.886119Z","title":"Metrological Advantages in Seeded and Lossy Nonlinear Interferome- ters","venue":null,"work_id":null,"year":2025},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":10,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:38.886119Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:2bc789e814d42cedc9bd311b5e987f5a4d157f62b5e49a0ec3287112b2154820","observation_id":"418c9c7c-80d4-4f3c-80a2-b79ed1e76f8b","resolution":{"observed_at":"2026-08-04T06:47:38.886119Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:38.989554Z","title":"The phase sensi- tivity of a fully quantum three-mode non- linear interferometer","venue":null,"work_id":null,"year":2018},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":11,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:38.989554Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:7575a99b104aeac1a32f576450acdb9a291fe6b91abe8a07fe6d00944851e2c0","observation_id":"54307b36-3296-442e-8c3f-362f48a019ef","resolution":{"observed_at":"2026-08-04T06:47:38.989554Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:39.078918Z","title":"Engineering nonlinear optic sources of photonic entanglement","venue":null,"work_id":null,"year":2011},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":12,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:39.078918Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:9666c53ef87341592fd12916a18ac2a1822695e606d38ea29878e1115fee6d07","observation_id":"8eeae28a-7976-4dba-b7b1-578d04081c47","resolution":{"observed_at":"2026-08-04T06:47:39.078918Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:39.163671Z","title":"On the unitary representations ofSU(1,1)andSU(2,1)","venue":null,"work_id":null,"year":1965},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":13,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:39.163671Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:f93b83a943f4b11336d236147339c138afb6a2260ebb3c09f002c39d7d27aed9","observation_id":"05a3c74e-129c-4d3a-b1e7-80f45ed599ec","resolution":{"observed_at":"2026-08-04T06:47:39.163671Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:39.270768Z","title":"Frustrated two-photon creation via interference","venue":null,"work_id":null,"year":1994},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":14,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:39.270768Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:c4be23b860d6f5d0dc2e92b3c42c625316451feb44538302470917ded95e787c","observation_id":"79dade9a-d178-482f-85ff-7d6b6bf58a5e","resolution":{"observed_at":"2026-08-04T06:47:39.270768Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:39.375315Z","title":"Augmenting the sensing performance of en- tangled photon pairs through asymmetry","venue":null,"work_id":null,"year":2021},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":15,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:39.375315Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:b94271614bd423652235065a14d58fd5a5659f95e87d7abaf9910ad9d0ba5e20","observation_id":"955e70ba-3975-41b0-8511-20b277c5f727","resolution":{"observed_at":"2026-08-04T06:47:39.375315Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:39.458822Z","title":"Non- linear interferometer for Fourier-transform mid-infrared gas spectroscopy using near- infrared detection","venue":null,"work_id":null,"year":2021},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":16,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:39.458822Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:58fcb59d0bdba9c971767f88058ef14486ccacfd4c204b75b469c660d27f2fa8","observation_id":"062f0843-4402-4153-b584-45740251001e","resolution":{"observed_at":"2026-08-04T06:47:39.458822Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:39.545415Z","title":"Ultra-broadband quan- tum infrared spectroscopy","venue":null,"work_id":null,"year":2024},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":17,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:39.545415Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:c00c48ec8e3e00393c6084dc4cb18508cf9718ad36efc53db27868d30992642f","observation_id":"8b8653d1-5ebb-4df0-bab4-815dd3f6702f","resolution":{"observed_at":"2026-08-04T06:47:39.545415Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:39.602911Z","title":"Microscopy with undetected photons in the mid-infrared","venue":null,"work_id":null,"year":2020},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":18,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:39.602911Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:398f53564e2db132f1b905afddff9d8cb38b8af1df51f99f6fc894334d590852","observation_id":"59a5b3fb-7c50-4464-8ada-44092f985a08","resolution":{"observed_at":"2026-08-04T06:47:39.602911Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:39.669577Z","title":"Video-rate imaging with undetected photons","venue":null,"work_id":null,"year":2021},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":19,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:39.669577Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:6cb64b7aa82a911dbee97582b258f155578f4cd20d40e6df8fe261a15afeb39a","observation_id":"15a54fdb-7f14-4a17-8512-93c1fad68452","resolution":{"observed_at":"2026-08-04T06:47:39.669577Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:39.727392Z","title":"Quantum holography with unde- tected light","venue":null,"work_id":null,"year":2022},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":20,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:39.727392Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:9219283c4a535dd8a21413bda4a7b45d77a9ff8f88ff538e5a1454b253d88b44","observation_id":"8eaf0d2e-d334-4b6e-a108-4a9545df5eb8","resolution":{"observed_at":"2026-08-04T06:47:39.727392Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:39.799438Z","title":"Off-axis holographic imaging with unde- tected light","venue":null,"work_id":null,"year":2024},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":21,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:39.799438Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:f5e9eb11d1014a951f83245715969c2be881254ce54c076f4d0d85314ab24d1f","observation_id":"ba224059-1453-4773-a1d4-ae5998f9078c","resolution":{"observed_at":"2026-08-04T06:47:39.799438Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:39.849210Z","title":"Synthetic quantum holography with undetected light","venue":null,"work_id":null,"year":2025},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":22,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:39.849210Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:2119fcc83a900ce588ef23aa22956931e47416c195f3468139baec0f29195657","observation_id":"1bcc8626-6283-404a-93b6-86d7e0295859","resolution":{"observed_at":"2026-08-04T06:47:39.849210Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:39.900271Z","title":"Effect of losses on the performance of an SU(1,1) interferometer","venue":null,"work_id":null,"year":2012},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":23,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:39.900271Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:c193867221854359ec1a811018d56b8aa73796f596c6bca8c53a32623a439113","observation_id":"9d562c48-bf43-49dd-a265-c433fa2e0e00","resolution":{"observed_at":"2026-08-04T06:47:39.900271Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:39.955214Z","title":"Intramode- correlation-enhanced phase sensitivities in an SU(1,1) interferometer","venue":null,"work_id":null,"year":2017},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":24,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:39.955214Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:88b6e7ff06e409b870e001e06eaa480ea133be0ee2b1bee88ddb8ef0c669353e","observation_id":"86cdea9c-6ada-4e8a-971c-f7abb00721fe","resolution":{"observed_at":"2026-08-04T06:47:39.955214Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:40.004506Z","title":"Improving the phase super-sensitivity of squeezing-assisted interferometers by squeeze factor unbalancing","venue":null,"work_id":null,"year":2017},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":25,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:40.004506Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:dfc4be9c921db47c62367504ec1de9addf759a5a7bb74c458805fa62e8028e15","observation_id":"eda3965d-07ab-48e8-b70e-70a55496cf78","resolution":{"observed_at":"2026-08-04T06:47:40.004506Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:40.062107Z","title":"Detection loss tolerant su- persensitive phase measurement with an SU(1,1) interferometer","venue":null,"work_id":null,"year":2017},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":26,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:40.062107Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:3d2bdf9dc5cddcf43c7bbd26e5b94364a02d67061140b967e51d5496a7e9da0c","observation_id":"0b83440e-05c3-4015-bd7e-e3c6fbae1ce4","resolution":{"observed_at":"2026-08-04T06:47:40.062107Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:40.134576Z","title":"In- duced coherence without induced emission","venue":null,"work_id":null,"year":1991},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":27,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:40.134576Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:d5e2a9ffe4af728950419598d00221b6135254c05e8df0f4e731c4ffcf2d1254","observation_id":"346c2980-6e6f-4fc3-9cb5-1ac930a938fa","resolution":{"observed_at":"2026-08-04T06:47:40.134576Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:40.258328Z","title":"Induced coherence with and without induced emis- sion","venue":null,"work_id":null,"year":2000},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":28,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:40.258328Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:989bf0edebb3c4814b8a73218995fdbf6af50e76028d99f86470b6da69591a05","observation_id":"7e73ac9e-1365-4e01-b045-7433739277d0","resolution":{"observed_at":"2026-08-04T06:47:40.258328Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:40.366913Z","title":"Controlling induced coherence for quantum imaging","venue":null,"work_id":null,"year":2017},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":29,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:40.366913Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:6996de018170f134ac3e0ba18ec04f2b514e408539e79c6b5cc63687a97e24c4","observation_id":"14b706b4-7e37-4d0c-8766-77768ceca0be","resolution":{"observed_at":"2026-08-04T06:47:40.366913Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:40.512284Z","title":"Complementarity relationship between coherence and path distinguishabil- ity in an interferometer based on induced co- herence","venue":null,"work_id":null,"year":2024},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":30,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:40.512284Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:a4a8c94462e3c991ceb01618007199e992be3f1865de092b569f14f30992f665","observation_id":"83db3bba-faac-4738-9ce2-7d4ea8fc99ed","resolution":{"observed_at":"2026-08-04T06:47:40.512284Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:40.698844Z","title":"Optimal phase measurements with bright- and vacuum-seeded SU(1,1) interferome- ters","venue":null,"work_id":null,"year":2017},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":31,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:40.698844Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:952f2e58aa6647764e260a09c70c224059c0ba8e2daa2ecc36ddf170c4554d32","observation_id":"5ead26e2-936c-45c2-a82c-65a4d552b9e8","resolution":{"observed_at":"2026-08-04T06:47:40.698844Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:40.816432Z","title":"Phase sens- ing beyond the standard quantum limit with a variation on the SU(1,1) interferometer","venue":null,"work_id":null,"year":2017},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":32,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:40.816432Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:bb3ed1bf716beb1f8f9bd7197d37c9431c25243406467a7c8dadf01950b1bb7a","observation_id":"533736b7-4ce4-4119-b40c-146d83766252","resolution":{"observed_at":"2026-08-04T06:47:40.816432Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:40.962069Z","title":"Opti- mized phase sensing in a truncated SU(1,1) interferometer","venue":null,"work_id":null,"year":2018},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":33,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:40.962069Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:f9f7bae5669f22340dfa71d07ac7eeb2341a25ac1873da8d923bcd18898094d5","observation_id":"7fc3e447-58cc-47c0-aeb5-58c02c9db19b","resolution":{"observed_at":"2026-08-04T06:47:40.962069Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:41.076515Z","title":"Reframing SU(1,1) inter- ferometry","venue":null,"work_id":null,"year":2020},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":34,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:41.076515Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:fbc98937e21b423a7aaa02c52c05a52ef4f9f2b9d6de9e9a39683497d5d622b4","observation_id":"c709fd46-4228-4b3f-aa47-dfb61c52a370","resolution":{"observed_at":"2026-08-04T06:47:41.076515Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:41.193143Z","title":"Versatile Super-Sensitive Metrology Using Induced Coherence","venue":null,"work_id":null,"year":2021},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":35,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:41.193143Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:8af4b9e6c3a0b8bed92adaed29ed8fd33d0314fa8683ae7eaaeb13a4c5f7acb6","observation_id":"1f62d477-b000-416a-a7d6-15c7622430e6","resolution":{"observed_at":"2026-08-04T06:47:41.193143Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":{"arxiv_id":"2508.05320","last_updated":"2025-08-07T12:24:36Z","snapshot_observed_at":"2026-08-06T08:46:12.727788Z","submitted_at":"2025-08-07T12:24:36Z","title":"Towards integrated sensors for optimized OCT with undetected photons","version":1},"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":"2508.05320","snapshot_observed_at":"2026-08-04T06:47:41.257058Z","title":"Towards integrated sensors for optimized OCT with undetected photons","venue":null,"work_id":null,"year":2025},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":36,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:41.257058Z"},"links":{"cited_paper":"/paper/2508.05320","citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:8aeed0fa266d17f5eac121957462765ae4dbd20bdacbf7e19f0ac69e7a54d5e7","observation_id":"ba864da4-ec10-45fa-8a80-43169a64608d","resolution":{"observed_at":"2026-08-04T06:47:41.257058Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:41.355763Z","title":"Coupling undetected sensing modes by quantum era- sure","venue":null,"work_id":null,"year":2024},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":37,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:41.355763Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:e03600d31a2767ff3267eefb7bdcf3f6d2e692b5927a7a9a4c29382729480f8e","observation_id":"717a636d-daf4-4c05-a531-4db548f93f9e","resolution":{"observed_at":"2026-08-04T06:47:41.355763Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:41.458319Z","title":"Generation of paired photons with controllable waveforms","venue":null,"work_id":null,"year":2005},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":38,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:41.458319Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:211c0e7944c9877710b65507061e93bd3e06d91c8e3867186080b0195363821a","observation_id":"2e2fb372-d9da-4071-9db3-bb60b2040bbf","resolution":{"observed_at":"2026-08-04T06:47:41.458319Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:41.610921Z","title":"Sensitivity of phase esti- mation with an SU(1,1) interferometer be- yond the single-mode approximation","venue":null,"work_id":null,"year":2026},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":39,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:41.610921Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:b14063572c83fb3acb7338fc238dc8599a7dbe6ed7576fbf4b1f7ce9536e6177","observation_id":"8c8cd5d6-8008-405a-a0ff-fbf5d2010951","resolution":{"observed_at":"2026-08-04T06:47:41.610921Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:41.733640Z","title":"Optimal phase point for SU(1,1) interferometer","venue":null,"work_id":null,"year":2019},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":40,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:41.733640Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:36e114103f4cf55ca54d54b56fba4b1bd0bd2311a5e395031ae082be421ca284","observation_id":"14fef00c-0387-4627-a02f-2d25601487ab","resolution":{"observed_at":"2026-08-04T06:47:41.733640Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:41.859726Z","title":"Infrared spec- troscopy with visible light","venue":null,"work_id":null,"year":2016},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":41,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:41.859726Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:a63bf1598da409d20b53e92eff0d913a0820d1b3a38ce9ff50468f71b8be7b24","observation_id":"cbe822a2-dec8-4b20-961c-96d6f551d7ab","resolution":{"observed_at":"2026-08-04T06:47:41.859726Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:41.917548Z","title":"Quantum imaging beyond the standard-quantum limit and phase distilla- tion","venue":null,"work_id":null,"year":2024},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":42,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:41.917548Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:faa02c3ff0317e91044087a6a4fb4d1017cbe5aae3e99814657a6f557e676fb4","observation_id":"687a3e49-09d8-43e6-82df-3b4a813481ca","resolution":{"observed_at":"2026-08-04T06:47:41.917548Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}},{"citation":{"cited_paper":null,"cited_work":{"arxiv_id":null,"doi":null,"metadata_source":null,"pith_arxiv_id":null,"snapshot_observed_at":"2026-08-04T06:47:42.064475Z","title":"Coherent-light-boosted, sub-shotnoise, quantum interferometry","venue":null,"work_id":null,"year":2010},"citing_paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers","version":2},"reference_index":43,"source":"pdf_text","source_observed_at":"2026-08-04T06:47:42.064475Z"},"links":{"citing_paper":"/paper/2601.04139"},"observation_digest":"sha256:aa7b5fd9b014b317348ac070d8f31a182bcac8820a7241504ad4e3a8c7fcfac0","observation_id":"105531b9-c7e9-473d-bf4a-40361f7690f3","resolution":{"observed_at":"2026-08-04T06:47:42.064475Z","resolver_source":null,"status":"unresolved"},"standing_notice":{"events":[],"reason":"canonical_work_link_unavailable","source_receipts":[],"state":"unavailable"}}],"paper":{"arxiv_id":"2601.04139","last_updated":"2026-08-03T16:25:31Z","latest_version":2,"primary_category":"quant-ph","snapshot_observed_at":"2026-08-07T21:26:15.638129Z","submitted_at":"2026-01-07T17:51:52Z","title":"Below-shot-noise capacity in phase estimation using nonlinear interferometers"},"reference_resolution":{"displayed":43,"state_counts":{"malformed_identifier":0,"metadata_mismatch":0,"parse_uncertain":0,"unresolved":43,"verified_exact":0,"verified_fuzzy":0},"total_outbound_references":43},"refusal":"A citation records a reference. It does not transfer a finding from one paper to another.","schema":"pith.paper-citation-record.v1","standing_sources":[{"observed_at":"2026-08-09T06:31:02.800959+00:00","source":"crossref"},{"observed_at":"2026-08-09T06:30:57.326959+00:00","source":"retraction_watch"}],"thesis":"As of 9 August 2026, this Paper Citation Record lists 43 of 43 outbound references and 1 inbound Pith citation observation for arXiv:2601.04139."}