{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2025:YFXOA4RBALRU5KKHSAK6URAISF","short_pith_number":"pith:YFXOA4RB","schema_version":"1.0","canonical_sha256":"c16ee0722102e34ea9479015ea4408916309c1866b598dae60513c92df8e6877","source":{"kind":"arxiv","id":"2507.13016","version":1},"attestation_state":"computed","paper":{"title":"Dark-state photonic entanglement filters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"quant-ph","authors_text":"Stefano Longhi","submitted_at":"2025-07-17T11:45:09Z","abstract_excerpt":"Preserving entanglement in the presence of decoherence remains a major challenge for quantum technologies. Recent proposals [M.A. Selim et al., Science 387, 1424 (2025)] have employed photonic filters based on anti-parity-time symmetry to recover certain entangled states, but these approaches require intricate, symmetry-constrained waveguide architectures and precise bath engineering. In this work, we show that such strict non-Hermitian symmetry constraints are not necessary for entanglement filtering. Instead, we identify post-selection and the emergence of dark states -- arising naturally th"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"2507.13016","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2025-07-17T11:45:09Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"d717a48daac602cd04b8330d7dea12164668b8e501fca72a4194eb2e41b9546a","abstract_canon_sha256":"affebe0dbd1c143feba432275a866a7ef106be0b6ef7c85bb34d03a907c7d9ea"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:53:48.986936Z","signature_b64":"evi97UGJs+0zLMRdzYJrZwCSAXd9PwEp6fimo7isRUPiojefnrIzrgS/x20NxNCtEcPNQU8AvCUV7tYK+3JTCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c16ee0722102e34ea9479015ea4408916309c1866b598dae60513c92df8e6877","last_reissued_at":"2026-07-05T11:53:48.986437Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:53:48.986437Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Dark-state photonic entanglement filters","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"quant-ph","authors_text":"Stefano Longhi","submitted_at":"2025-07-17T11:45:09Z","abstract_excerpt":"Preserving entanglement in the presence of decoherence remains a major challenge for quantum technologies. Recent proposals [M.A. Selim et al., Science 387, 1424 (2025)] have employed photonic filters based on anti-parity-time symmetry to recover certain entangled states, but these approaches require intricate, symmetry-constrained waveguide architectures and precise bath engineering. In this work, we show that such strict non-Hermitian symmetry constraints are not necessary for entanglement filtering. Instead, we identify post-selection and the emergence of dark states -- arising naturally th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2507.13016","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2507.13016/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2507.13016","created_at":"2026-07-05T11:53:48.986500+00:00"},{"alias_kind":"arxiv_version","alias_value":"2507.13016v1","created_at":"2026-07-05T11:53:48.986500+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2507.13016","created_at":"2026-07-05T11:53:48.986500+00:00"},{"alias_kind":"pith_short_12","alias_value":"YFXOA4RBALRU","created_at":"2026-07-05T11:53:48.986500+00:00"},{"alias_kind":"pith_short_16","alias_value":"YFXOA4RBALRU5KKH","created_at":"2026-07-05T11:53:48.986500+00:00"},{"alias_kind":"pith_short_8","alias_value":"YFXOA4RB","created_at":"2026-07-05T11:53:48.986500+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":1,"internal_anchor_count":1,"sample":[{"citing_arxiv_id":"2508.09485","citing_title":"Lifshitz-like Metastability and Optimal Dephasing in Dissipative Bosonic Lattices","ref_index":53,"is_internal_anchor":true}]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/YFXOA4RBALRU5KKHSAK6URAISF","json":"https://pith.science/pith/YFXOA4RBALRU5KKHSAK6URAISF.json","graph_json":"https://pith.science/api/pith-number/YFXOA4RBALRU5KKHSAK6URAISF/graph.json","events_json":"https://pith.science/api/pith-number/YFXOA4RBALRU5KKHSAK6URAISF/events.json","paper":"https://pith.science/paper/YFXOA4RB"},"agent_actions":{"view_html":"https://pith.science/pith/YFXOA4RBALRU5KKHSAK6URAISF","download_json":"https://pith.science/pith/YFXOA4RBALRU5KKHSAK6URAISF.json","view_paper":"https://pith.science/paper/YFXOA4RB","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2507.13016&json=true","fetch_graph":"https://pith.science/api/pith-number/YFXOA4RBALRU5KKHSAK6URAISF/graph.json","fetch_events":"https://pith.science/api/pith-number/YFXOA4RBALRU5KKHSAK6URAISF/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/YFXOA4RBALRU5KKHSAK6URAISF/action/timestamp_anchor","attest_storage":"https://pith.science/pith/YFXOA4RBALRU5KKHSAK6URAISF/action/storage_attestation","attest_author":"https://pith.science/pith/YFXOA4RBALRU5KKHSAK6URAISF/action/author_attestation","sign_citation":"https://pith.science/pith/YFXOA4RBALRU5KKHSAK6URAISF/action/citation_signature","submit_replication":"https://pith.science/pith/YFXOA4RBALRU5KKHSAK6URAISF/action/replication_record"}},"created_at":"2026-07-05T11:53:48.986500+00:00","updated_at":"2026-07-05T11:53:48.986500+00:00"}