{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:UR5MIXZIIDJTFCWFUPLRU3FVH3","short_pith_number":"pith:UR5MIXZI","schema_version":"1.0","canonical_sha256":"a47ac45f2840d3328ac5a3d71a6cb53ee62170897853a61bd651de9537234327","source":{"kind":"arxiv","id":"1805.02462","version":2},"attestation_state":"computed","paper":{"title":"Pair-Breaking Collective Branch in BCS Superconductors and Superfluid Fermi Gases","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.supr-con"],"primary_cat":"cond-mat.quant-gas","authors_text":"Hadrien Kurkjian, J. Tempere, S. N. Klimin, Y. Castin (LKB (Lhomond))","submitted_at":"2018-05-07T12:03:33Z","abstract_excerpt":"We demonstrate the existence of a collective excitation branch in the pair-breaking continuum of superfluid Fermi gases and BCS superconductors. At zero temperature, we analytically continue the equation on the collective mode energy in Anderson's Random Phase Approximation or Gaussian fluctuations through its branch cut associated with the continuum, and obtain the full complex dispersion relation, including in the strong coupling regime. The branch exists as long as the chemical potential $\\mu$ is positive and the wave number below $\\sqrt{2m\\mu}/\\hbar$ (with m the fermion mass). In the long "},"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":"1805.02462","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2018-05-07T12:03:33Z","cross_cats_sorted":["cond-mat.supr-con"],"title_canon_sha256":"6aab6f8f24753939787a69a1075ed46b92345b596f2e5812a669c17a4311f211","abstract_canon_sha256":"f7dde13f2a7427c6305e5240a6c0cab5decf89285e2773612ab2d8d66a89c4a2"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:44:13.415739Z","signature_b64":"Y0X9GEPnDyjxZ/D1D0i9fzMUax8/UYmCjo0lgGHQiU7HSgRlWWlJBBdQ5lbhgqLbxn/oG1bRzjm9bWbRrQ/uDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a47ac45f2840d3328ac5a3d71a6cb53ee62170897853a61bd651de9537234327","last_reissued_at":"2026-05-17T23:44:13.415114Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:44:13.415114Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Pair-Breaking Collective Branch in BCS Superconductors and Superfluid Fermi Gases","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.supr-con"],"primary_cat":"cond-mat.quant-gas","authors_text":"Hadrien Kurkjian, J. Tempere, S. N. Klimin, Y. Castin (LKB (Lhomond))","submitted_at":"2018-05-07T12:03:33Z","abstract_excerpt":"We demonstrate the existence of a collective excitation branch in the pair-breaking continuum of superfluid Fermi gases and BCS superconductors. At zero temperature, we analytically continue the equation on the collective mode energy in Anderson's Random Phase Approximation or Gaussian fluctuations through its branch cut associated with the continuum, and obtain the full complex dispersion relation, including in the strong coupling regime. The branch exists as long as the chemical potential $\\mu$ is positive and the wave number below $\\sqrt{2m\\mu}/\\hbar$ (with m the fermion mass). In the long "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.02462","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1805.02462","created_at":"2026-05-17T23:44:13.415193+00:00"},{"alias_kind":"arxiv_version","alias_value":"1805.02462v2","created_at":"2026-05-17T23:44:13.415193+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.02462","created_at":"2026-05-17T23:44:13.415193+00:00"},{"alias_kind":"pith_short_12","alias_value":"UR5MIXZIIDJT","created_at":"2026-05-18T12:32:56.356000+00:00"},{"alias_kind":"pith_short_16","alias_value":"UR5MIXZIIDJTFCWF","created_at":"2026-05-18T12:32:56.356000+00:00"},{"alias_kind":"pith_short_8","alias_value":"UR5MIXZI","created_at":"2026-05-18T12:32:56.356000+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/UR5MIXZIIDJTFCWFUPLRU3FVH3","json":"https://pith.science/pith/UR5MIXZIIDJTFCWFUPLRU3FVH3.json","graph_json":"https://pith.science/api/pith-number/UR5MIXZIIDJTFCWFUPLRU3FVH3/graph.json","events_json":"https://pith.science/api/pith-number/UR5MIXZIIDJTFCWFUPLRU3FVH3/events.json","paper":"https://pith.science/paper/UR5MIXZI"},"agent_actions":{"view_html":"https://pith.science/pith/UR5MIXZIIDJTFCWFUPLRU3FVH3","download_json":"https://pith.science/pith/UR5MIXZIIDJTFCWFUPLRU3FVH3.json","view_paper":"https://pith.science/paper/UR5MIXZI","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1805.02462&json=true","fetch_graph":"https://pith.science/api/pith-number/UR5MIXZIIDJTFCWFUPLRU3FVH3/graph.json","fetch_events":"https://pith.science/api/pith-number/UR5MIXZIIDJTFCWFUPLRU3FVH3/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/UR5MIXZIIDJTFCWFUPLRU3FVH3/action/timestamp_anchor","attest_storage":"https://pith.science/pith/UR5MIXZIIDJTFCWFUPLRU3FVH3/action/storage_attestation","attest_author":"https://pith.science/pith/UR5MIXZIIDJTFCWFUPLRU3FVH3/action/author_attestation","sign_citation":"https://pith.science/pith/UR5MIXZIIDJTFCWFUPLRU3FVH3/action/citation_signature","submit_replication":"https://pith.science/pith/UR5MIXZIIDJTFCWFUPLRU3FVH3/action/replication_record"}},"created_at":"2026-05-17T23:44:13.415193+00:00","updated_at":"2026-05-17T23:44:13.415193+00:00"}