{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:PAJGVWVMF5KHUMLTBJOSOV3XUY","short_pith_number":"pith:PAJGVWVM","schema_version":"1.0","canonical_sha256":"78126adaac2f547a31730a5d275777a611ef4d6fd486a68d232a57a593a2b48a","source":{"kind":"arxiv","id":"1608.00125","version":3},"attestation_state":"computed","paper":{"title":"Superconductivity in repulsively interacting fermions on a diamond chain: flat-band induced pairing","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"Hideo Aoki, Keita Kobayashi, Masahiko Machida, Masahiko Okumura, Susumu Yamada","submitted_at":"2016-07-30T14:14:11Z","abstract_excerpt":"To explore whether a flat-band system can accommodate superconductivity, we consider repulsively interacting fermions on the diamond chain, a simplest quasi-one-dimensional system that contains a flat band. Exact diagonalization and the density-matrix renormalization group (DMRG) are used to show that we have a significant binding energy of a Cooper pair with a long-tailed pair-pair correlation in real space when the total band filling is slightly below $1/3$, where the dispersive band interacts with the flat band that is empty but close to $E_F$. Pairs selectively formed across the outer site"},"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":"1608.00125","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.supr-con","submitted_at":"2016-07-30T14:14:11Z","cross_cats_sorted":[],"title_canon_sha256":"5cd59b48836cb881131334fbdcb27dc37b94ca7beca4719296da203bb57d880f","abstract_canon_sha256":"acd66e4a9811239a2ccf1a5e619247d0303c5d560365dda08b85b8af8009034c"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:53:40.138727Z","signature_b64":"t4pb+vGaUe8VRUXHltDDu61/DpAyYk5DrXligaR+Q/W4ypHnQ5fiFEht7KQ7TElLV+BQy+JEVgsVPdQ3NaxKBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"78126adaac2f547a31730a5d275777a611ef4d6fd486a68d232a57a593a2b48a","last_reissued_at":"2026-05-18T00:53:40.138330Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:53:40.138330Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Superconductivity in repulsively interacting fermions on a diamond chain: flat-band induced pairing","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.supr-con","authors_text":"Hideo Aoki, Keita Kobayashi, Masahiko Machida, Masahiko Okumura, Susumu Yamada","submitted_at":"2016-07-30T14:14:11Z","abstract_excerpt":"To explore whether a flat-band system can accommodate superconductivity, we consider repulsively interacting fermions on the diamond chain, a simplest quasi-one-dimensional system that contains a flat band. Exact diagonalization and the density-matrix renormalization group (DMRG) are used to show that we have a significant binding energy of a Cooper pair with a long-tailed pair-pair correlation in real space when the total band filling is slightly below $1/3$, where the dispersive band interacts with the flat band that is empty but close to $E_F$. Pairs selectively formed across the outer site"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1608.00125","kind":"arxiv","version":3},"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":"1608.00125","created_at":"2026-05-18T00:53:40.138402+00:00"},{"alias_kind":"arxiv_version","alias_value":"1608.00125v3","created_at":"2026-05-18T00:53:40.138402+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1608.00125","created_at":"2026-05-18T00:53:40.138402+00:00"},{"alias_kind":"pith_short_12","alias_value":"PAJGVWVMF5KH","created_at":"2026-05-18T12:30:39.010887+00:00"},{"alias_kind":"pith_short_16","alias_value":"PAJGVWVMF5KHUMLT","created_at":"2026-05-18T12:30:39.010887+00:00"},{"alias_kind":"pith_short_8","alias_value":"PAJGVWVM","created_at":"2026-05-18T12:30:39.010887+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/PAJGVWVMF5KHUMLTBJOSOV3XUY","json":"https://pith.science/pith/PAJGVWVMF5KHUMLTBJOSOV3XUY.json","graph_json":"https://pith.science/api/pith-number/PAJGVWVMF5KHUMLTBJOSOV3XUY/graph.json","events_json":"https://pith.science/api/pith-number/PAJGVWVMF5KHUMLTBJOSOV3XUY/events.json","paper":"https://pith.science/paper/PAJGVWVM"},"agent_actions":{"view_html":"https://pith.science/pith/PAJGVWVMF5KHUMLTBJOSOV3XUY","download_json":"https://pith.science/pith/PAJGVWVMF5KHUMLTBJOSOV3XUY.json","view_paper":"https://pith.science/paper/PAJGVWVM","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1608.00125&json=true","fetch_graph":"https://pith.science/api/pith-number/PAJGVWVMF5KHUMLTBJOSOV3XUY/graph.json","fetch_events":"https://pith.science/api/pith-number/PAJGVWVMF5KHUMLTBJOSOV3XUY/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/PAJGVWVMF5KHUMLTBJOSOV3XUY/action/timestamp_anchor","attest_storage":"https://pith.science/pith/PAJGVWVMF5KHUMLTBJOSOV3XUY/action/storage_attestation","attest_author":"https://pith.science/pith/PAJGVWVMF5KHUMLTBJOSOV3XUY/action/author_attestation","sign_citation":"https://pith.science/pith/PAJGVWVMF5KHUMLTBJOSOV3XUY/action/citation_signature","submit_replication":"https://pith.science/pith/PAJGVWVMF5KHUMLTBJOSOV3XUY/action/replication_record"}},"created_at":"2026-05-18T00:53:40.138402+00:00","updated_at":"2026-05-18T00:53:40.138402+00:00"}