{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:L76TJUGN2XFQ4LBRPX27TJFAQX","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":"52fca503fcf1250e3111bc8741d20f5110c4ef238786a2ae988792f28c7a82d1","cross_cats_sorted":["cond-mat.quant-gas","physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2022-07-04T09:04:54Z","title_canon_sha256":"04fc91d5ebcdf0bb48269d0dbd75511c44221ca53911dcd226b8ac29190e4010"},"schema_version":"1.0","source":{"id":"2207.01270","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2207.01270","created_at":"2026-07-05T04:37:10Z"},{"alias_kind":"arxiv_version","alias_value":"2207.01270v1","created_at":"2026-07-05T04:37:10Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2207.01270","created_at":"2026-07-05T04:37:10Z"},{"alias_kind":"pith_short_12","alias_value":"L76TJUGN2XFQ","created_at":"2026-07-05T04:37:10Z"},{"alias_kind":"pith_short_16","alias_value":"L76TJUGN2XFQ4LBR","created_at":"2026-07-05T04:37:10Z"},{"alias_kind":"pith_short_8","alias_value":"L76TJUGN","created_at":"2026-07-05T04:37:10Z"}],"graph_snapshots":[{"event_id":"sha256:0e5fab71e3bf4a6867784ecd700e291d17888008a2e468c33c03b42dd1f59113","target":"graph","created_at":"2026-07-05T04:37:10Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2207.01270/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The high-fidelity analysis of many-body quantum states of indistinguishable atoms requires the accurate counting of atoms. Here we report the tomographic reconstruction of an atom-number-resolving detector. The tomography is performed with an ultracold rubidium ensemble that is prepared in a coherent spin state by driving a Rabi coupling between the two hyperfine clock levels. The coupling is followed by counting the occupation number in one level. We characterize the fidelity of our detector and show that a negative-valued Wigner function is associated with it. Our results offer an exciting p","authors_text":"Andreas H\\\"uper, Augusto Smerzi, Carsten Klempt, Cebrail P\\\"ur, Jens Kruse, Jiao Geng, Luca Pezz\\`e, Luis Santos, Mareike Hetzel, Martin Quensen, Wolfgang Ertmer","cross_cats":["cond-mat.quant-gas","physics.atom-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2022-07-04T09:04:54Z","title":"Tomography of a number-resolving detector by reconstruction of an atomic many-body quantum state"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2207.01270","kind":"arxiv","version":1},"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:dfadcbaac202ed3dcd38ce46512902219791ece813a8324d5e51000ae5f6332f","target":"record","created_at":"2026-07-05T04:37:10Z","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":"52fca503fcf1250e3111bc8741d20f5110c4ef238786a2ae988792f28c7a82d1","cross_cats_sorted":["cond-mat.quant-gas","physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2022-07-04T09:04:54Z","title_canon_sha256":"04fc91d5ebcdf0bb48269d0dbd75511c44221ca53911dcd226b8ac29190e4010"},"schema_version":"1.0","source":{"id":"2207.01270","kind":"arxiv","version":1}},"canonical_sha256":"5ffd34d0cdd5cb0e2c317df5f9a4a085d364e76fb26e433600d47646d0745d83","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5ffd34d0cdd5cb0e2c317df5f9a4a085d364e76fb26e433600d47646d0745d83","first_computed_at":"2026-07-05T04:37:10.023211Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T04:37:10.023211Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2ApaHS9DdVubSBFsD76iVtWVsgCe9zS5wdvSO0kTasBdSXvD2opUUpThIykrjL9OXCG++uHOclIwN+Z0m3bwBA==","signature_status":"signed_v1","signed_at":"2026-07-05T04:37:10.023647Z","signed_message":"canonical_sha256_bytes"},"source_id":"2207.01270","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dfadcbaac202ed3dcd38ce46512902219791ece813a8324d5e51000ae5f6332f","sha256:0e5fab71e3bf4a6867784ecd700e291d17888008a2e468c33c03b42dd1f59113"],"state_sha256":"77158b2387b38f27d087a88f1bae263fc8b873c3213415150eebd8cde6a9713c"}