{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2014:NJEP6TQPNKMTRLFZUH5A6YRLI2","short_pith_number":"pith:NJEP6TQP","schema_version":"1.0","canonical_sha256":"6a48ff4e0f6a9938acb9a1fa0f622b46969a20f603871afae77f4de4a3a0aed9","source":{"kind":"arxiv","id":"1408.5239","version":1},"attestation_state":"computed","paper":{"title":"The critical velocity in the BEC-BCS crossover","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"cond-mat.quant-gas","authors_text":"Henning Moritz, Jonas Siegl, Kai Morgener, Klaus Hueck, Ludwig Mathey, Niclas Luick, Vijay Pal Singh, Wolf Weimer","submitted_at":"2014-08-22T09:30:18Z","abstract_excerpt":"We map out the critical velocity in the crossover from Bose-Einstein condensation (BEC) to Bardeen-Cooper-Schrieffer superfluidity with ultracold $^{6}$Li gases. A small attractive potential is dragged along lines of constant column density. The rate of the induced heating increases steeply above a critical velocity $v_c$. In the same samples, we measure the speed of sound $v_s$ by exciting density waves and compare the results to the measured values of $v_c$. We perform numerical simulations in the BEC regime and find very good agreement, validating the approach. In the strongly correlated re"},"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":"1408.5239","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2014-08-22T09:30:18Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"8a87f2a3d73740ed2c5e3c3df62fdb398680e29fec746849229b0c888140b5ce","abstract_canon_sha256":"423edb0b469af63149ee06239b543ad01d9be5b4bac1f3913edeaa8f7590cb98"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:00:02.591953Z","signature_b64":"A5XS8D15Odhe6V7krqpDf6Wl4X5M5Y1hcj+G2nhtfFL5yzF0LcBky3e14PPsKawyz4s1ecwFgY17+txILtjBDg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6a48ff4e0f6a9938acb9a1fa0f622b46969a20f603871afae77f4de4a3a0aed9","last_reissued_at":"2026-05-18T02:00:02.591452Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:00:02.591452Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"The critical velocity in the BEC-BCS crossover","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"cond-mat.quant-gas","authors_text":"Henning Moritz, Jonas Siegl, Kai Morgener, Klaus Hueck, Ludwig Mathey, Niclas Luick, Vijay Pal Singh, Wolf Weimer","submitted_at":"2014-08-22T09:30:18Z","abstract_excerpt":"We map out the critical velocity in the crossover from Bose-Einstein condensation (BEC) to Bardeen-Cooper-Schrieffer superfluidity with ultracold $^{6}$Li gases. A small attractive potential is dragged along lines of constant column density. The rate of the induced heating increases steeply above a critical velocity $v_c$. In the same samples, we measure the speed of sound $v_s$ by exciting density waves and compare the results to the measured values of $v_c$. We perform numerical simulations in the BEC regime and find very good agreement, validating the approach. In the strongly correlated re"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1408.5239","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":""},"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":"1408.5239","created_at":"2026-05-18T02:00:02.591537+00:00"},{"alias_kind":"arxiv_version","alias_value":"1408.5239v1","created_at":"2026-05-18T02:00:02.591537+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1408.5239","created_at":"2026-05-18T02:00:02.591537+00:00"},{"alias_kind":"pith_short_12","alias_value":"NJEP6TQPNKMT","created_at":"2026-05-18T12:28:41.024544+00:00"},{"alias_kind":"pith_short_16","alias_value":"NJEP6TQPNKMTRLFZ","created_at":"2026-05-18T12:28:41.024544+00:00"},{"alias_kind":"pith_short_8","alias_value":"NJEP6TQP","created_at":"2026-05-18T12:28:41.024544+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/NJEP6TQPNKMTRLFZUH5A6YRLI2","json":"https://pith.science/pith/NJEP6TQPNKMTRLFZUH5A6YRLI2.json","graph_json":"https://pith.science/api/pith-number/NJEP6TQPNKMTRLFZUH5A6YRLI2/graph.json","events_json":"https://pith.science/api/pith-number/NJEP6TQPNKMTRLFZUH5A6YRLI2/events.json","paper":"https://pith.science/paper/NJEP6TQP"},"agent_actions":{"view_html":"https://pith.science/pith/NJEP6TQPNKMTRLFZUH5A6YRLI2","download_json":"https://pith.science/pith/NJEP6TQPNKMTRLFZUH5A6YRLI2.json","view_paper":"https://pith.science/paper/NJEP6TQP","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1408.5239&json=true","fetch_graph":"https://pith.science/api/pith-number/NJEP6TQPNKMTRLFZUH5A6YRLI2/graph.json","fetch_events":"https://pith.science/api/pith-number/NJEP6TQPNKMTRLFZUH5A6YRLI2/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/NJEP6TQPNKMTRLFZUH5A6YRLI2/action/timestamp_anchor","attest_storage":"https://pith.science/pith/NJEP6TQPNKMTRLFZUH5A6YRLI2/action/storage_attestation","attest_author":"https://pith.science/pith/NJEP6TQPNKMTRLFZUH5A6YRLI2/action/author_attestation","sign_citation":"https://pith.science/pith/NJEP6TQPNKMTRLFZUH5A6YRLI2/action/citation_signature","submit_replication":"https://pith.science/pith/NJEP6TQPNKMTRLFZUH5A6YRLI2/action/replication_record"}},"created_at":"2026-05-18T02:00:02.591537+00:00","updated_at":"2026-05-18T02:00:02.591537+00:00"}