{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:XIBP4YNC4JKRUG6NOHAP74WCBK","short_pith_number":"pith:XIBP4YNC","canonical_record":{"source":{"id":"1504.05314","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-04-21T05:36:49Z","cross_cats_sorted":[],"title_canon_sha256":"2a66e8d0e24be5bcfc12926379a7e0aea2a41bda4a81be64948fa966c40ec85c","abstract_canon_sha256":"8e179934ba8f65877be2ac919ddfa16d5e3002095d546a5c6329089c4f086cea"},"schema_version":"1.0"},"canonical_sha256":"ba02fe61a2e2551a1bcd71c0fff2c20a86f31ac510f6ed12a1dc8b62376678d9","source":{"kind":"arxiv","id":"1504.05314","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.05314","created_at":"2026-05-18T01:35:30Z"},{"alias_kind":"arxiv_version","alias_value":"1504.05314v2","created_at":"2026-05-18T01:35:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.05314","created_at":"2026-05-18T01:35:30Z"},{"alias_kind":"pith_short_12","alias_value":"XIBP4YNC4JKR","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"XIBP4YNC4JKRUG6N","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"XIBP4YNC","created_at":"2026-05-18T12:29:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:XIBP4YNC4JKRUG6NOHAP74WCBK","target":"record","payload":{"canonical_record":{"source":{"id":"1504.05314","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-04-21T05:36:49Z","cross_cats_sorted":[],"title_canon_sha256":"2a66e8d0e24be5bcfc12926379a7e0aea2a41bda4a81be64948fa966c40ec85c","abstract_canon_sha256":"8e179934ba8f65877be2ac919ddfa16d5e3002095d546a5c6329089c4f086cea"},"schema_version":"1.0"},"canonical_sha256":"ba02fe61a2e2551a1bcd71c0fff2c20a86f31ac510f6ed12a1dc8b62376678d9","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:35:30.347560Z","signature_b64":"NXizjMuzCqGZ1NPe40BXJ9kPBIA3Xri6UJcg4u8Wv/nQJ7YUzNaSWEmlP4PX6NgRTadbeCxHn6xt1MCb4edaAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ba02fe61a2e2551a1bcd71c0fff2c20a86f31ac510f6ed12a1dc8b62376678d9","last_reissued_at":"2026-05-18T01:35:30.346683Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:35:30.346683Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1504.05314","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:35:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"LjLOCbYiZbdGqOp4bJ4SMgkY7OrTi64N/kdDuxFI8LF1U5NcmJebFWYrg2+FmdRe17SMaEsgeLWIpKPpimpMDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T04:16:52.398172Z"},"content_sha256":"cd82730d71d0d5838d4f010dbc2924bfc2676efbb1c91efe67791aa13b490b57","schema_version":"1.0","event_id":"sha256:cd82730d71d0d5838d4f010dbc2924bfc2676efbb1c91efe67791aa13b490b57"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:XIBP4YNC4JKRUG6NOHAP74WCBK","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Nonlinear Michelson interferometer for improved quantum metrology","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Alfredo Luis, \\'Angel Rivas","submitted_at":"2015-04-21T05:36:49Z","abstract_excerpt":"We examine quantum detection via a Michelson interferometer embedded in a gas with Kerr nonlinearity. This nonlinear interferometer is illuminated by pulses of classical light. This strategy combines the robustness against practical imperfections of classical light with the improvement provided by nonlinear processes. Regarding ultimate quantum limits, we stress that, as a difference with linear schemes, the nonlinearity introduces pulse duration as a new variable into play along with the energy resources."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.05314","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:35:30Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xyC/Eo05+7vZhFWtz0ErjBwiY4eZzGK39lQkntgIsnNvwdhb2W32U+UKMuNPaIQSkPywcTQGplCKKTCFJOFfBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-23T04:16:52.398534Z"},"content_sha256":"2bf8023bbf39c6b2d3b01728ddb65c392a416551de846aac2424ed656181bee1","schema_version":"1.0","event_id":"sha256:2bf8023bbf39c6b2d3b01728ddb65c392a416551de846aac2424ed656181bee1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XIBP4YNC4JKRUG6NOHAP74WCBK/bundle.json","state_url":"https://pith.science/pith/XIBP4YNC4JKRUG6NOHAP74WCBK/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XIBP4YNC4JKRUG6NOHAP74WCBK/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-23T04:16:52Z","links":{"resolver":"https://pith.science/pith/XIBP4YNC4JKRUG6NOHAP74WCBK","bundle":"https://pith.science/pith/XIBP4YNC4JKRUG6NOHAP74WCBK/bundle.json","state":"https://pith.science/pith/XIBP4YNC4JKRUG6NOHAP74WCBK/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XIBP4YNC4JKRUG6NOHAP74WCBK/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:XIBP4YNC4JKRUG6NOHAP74WCBK","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"8e179934ba8f65877be2ac919ddfa16d5e3002095d546a5c6329089c4f086cea","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-04-21T05:36:49Z","title_canon_sha256":"2a66e8d0e24be5bcfc12926379a7e0aea2a41bda4a81be64948fa966c40ec85c"},"schema_version":"1.0","source":{"id":"1504.05314","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1504.05314","created_at":"2026-05-18T01:35:30Z"},{"alias_kind":"arxiv_version","alias_value":"1504.05314v2","created_at":"2026-05-18T01:35:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.05314","created_at":"2026-05-18T01:35:30Z"},{"alias_kind":"pith_short_12","alias_value":"XIBP4YNC4JKR","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_16","alias_value":"XIBP4YNC4JKRUG6N","created_at":"2026-05-18T12:29:50Z"},{"alias_kind":"pith_short_8","alias_value":"XIBP4YNC","created_at":"2026-05-18T12:29:50Z"}],"graph_snapshots":[{"event_id":"sha256:2bf8023bbf39c6b2d3b01728ddb65c392a416551de846aac2424ed656181bee1","target":"graph","created_at":"2026-05-18T01:35:30Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"We examine quantum detection via a Michelson interferometer embedded in a gas with Kerr nonlinearity. This nonlinear interferometer is illuminated by pulses of classical light. This strategy combines the robustness against practical imperfections of classical light with the improvement provided by nonlinear processes. Regarding ultimate quantum limits, we stress that, as a difference with linear schemes, the nonlinearity introduces pulse duration as a new variable into play along with the energy resources.","authors_text":"Alfredo Luis, \\'Angel Rivas","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-04-21T05:36:49Z","title":"Nonlinear Michelson interferometer for improved quantum metrology"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.05314","kind":"arxiv","version":2},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:cd82730d71d0d5838d4f010dbc2924bfc2676efbb1c91efe67791aa13b490b57","target":"record","created_at":"2026-05-18T01:35:30Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"8e179934ba8f65877be2ac919ddfa16d5e3002095d546a5c6329089c4f086cea","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-04-21T05:36:49Z","title_canon_sha256":"2a66e8d0e24be5bcfc12926379a7e0aea2a41bda4a81be64948fa966c40ec85c"},"schema_version":"1.0","source":{"id":"1504.05314","kind":"arxiv","version":2}},"canonical_sha256":"ba02fe61a2e2551a1bcd71c0fff2c20a86f31ac510f6ed12a1dc8b62376678d9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ba02fe61a2e2551a1bcd71c0fff2c20a86f31ac510f6ed12a1dc8b62376678d9","first_computed_at":"2026-05-18T01:35:30.346683Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:35:30.346683Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"NXizjMuzCqGZ1NPe40BXJ9kPBIA3Xri6UJcg4u8Wv/nQJ7YUzNaSWEmlP4PX6NgRTadbeCxHn6xt1MCb4edaAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:35:30.347560Z","signed_message":"canonical_sha256_bytes"},"source_id":"1504.05314","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cd82730d71d0d5838d4f010dbc2924bfc2676efbb1c91efe67791aa13b490b57","sha256:2bf8023bbf39c6b2d3b01728ddb65c392a416551de846aac2424ed656181bee1"],"state_sha256":"b61a2202829d04d01fa7daace69ccf9e0f889075dafe9c285f76e05f7ba3ff68"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Gdw2cSzkKc2fhzah0sFkfSVUrFmnZPlrS9w+jCA7DhUWCvCphN3qWnD0fFZkqiOJvuM6mcD81qp580dlJyJkDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-23T04:16:52.400408Z","bundle_sha256":"e976bfc5e50aecc121426b169730396d648ace7c3b95bfc53a5493b4a80fc6ea"}}