{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:NGFGZ3V5RM7SCTRTXQ4CK5PNTF","short_pith_number":"pith:NGFGZ3V5","schema_version":"1.0","canonical_sha256":"698a6ceebd8b3f214e33bc382575ed995f5d8f89852b71f9be96c5a39bb1006f","source":{"kind":"arxiv","id":"1502.04799","version":1},"attestation_state":"computed","paper":{"title":"Drude and Superconducting Weights and Mott Transitions in Variation Theory","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Hisatoshi Yokoyama, Shun Tamura","submitted_at":"2015-02-17T05:22:13Z","abstract_excerpt":"Drude weight ($D$) is a useful measure to distinguish a metal from an insulator. However, $D$ has not been justifiably estimated by the variation theory for long, since Millis and Coppersmith [Phys. Rev. B 43 (1991) 13770] pointed out that a variational wave function $\\Psi_Q$, which includes the key ingredient (doublon-holon binding effect) for a Mott transition, yields a positive $D$ (namely metallic) even in the Mott-insulating regime. We argue that, to obtain a correct $D$, an imaginary part must exist in the wave function. By introducing a configuration-dependent phase factor ${\\cal P}_\\th"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1502.04799","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2015-02-17T05:22:13Z","cross_cats_sorted":[],"title_canon_sha256":"2b7712eb238c25c04164e5211413dbd1280a60d79ad2279d0712300a08c3a82d","abstract_canon_sha256":"2cb575d35cfed271db77104b24f782f833763ac7826b3a5a39998e67dde9bb5e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:13:28.734348Z","signature_b64":"v3J9gQosLH/V3UzwTr1xjJ0418KaN23rO/8WvOLaj+B9UXxsRgSSmiBkEUREzvI74uCC2asUq6XDaQD9uwXyAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"698a6ceebd8b3f214e33bc382575ed995f5d8f89852b71f9be96c5a39bb1006f","last_reissued_at":"2026-05-18T01:13:28.733925Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:13:28.733925Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Drude and Superconducting Weights and Mott Transitions in Variation Theory","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Hisatoshi Yokoyama, Shun Tamura","submitted_at":"2015-02-17T05:22:13Z","abstract_excerpt":"Drude weight ($D$) is a useful measure to distinguish a metal from an insulator. However, $D$ has not been justifiably estimated by the variation theory for long, since Millis and Coppersmith [Phys. Rev. B 43 (1991) 13770] pointed out that a variational wave function $\\Psi_Q$, which includes the key ingredient (doublon-holon binding effect) for a Mott transition, yields a positive $D$ (namely metallic) even in the Mott-insulating regime. We argue that, to obtain a correct $D$, an imaginary part must exist in the wave function. By introducing a configuration-dependent phase factor ${\\cal P}_\\th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.04799","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":"1502.04799","created_at":"2026-05-18T01:13:28.733989+00:00"},{"alias_kind":"arxiv_version","alias_value":"1502.04799v1","created_at":"2026-05-18T01:13:28.733989+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.04799","created_at":"2026-05-18T01:13:28.733989+00:00"},{"alias_kind":"pith_short_12","alias_value":"NGFGZ3V5RM7S","created_at":"2026-05-18T12:29:32.376354+00:00"},{"alias_kind":"pith_short_16","alias_value":"NGFGZ3V5RM7SCTRT","created_at":"2026-05-18T12:29:32.376354+00:00"},{"alias_kind":"pith_short_8","alias_value":"NGFGZ3V5","created_at":"2026-05-18T12:29:32.376354+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/NGFGZ3V5RM7SCTRTXQ4CK5PNTF","json":"https://pith.science/pith/NGFGZ3V5RM7SCTRTXQ4CK5PNTF.json","graph_json":"https://pith.science/api/pith-number/NGFGZ3V5RM7SCTRTXQ4CK5PNTF/graph.json","events_json":"https://pith.science/api/pith-number/NGFGZ3V5RM7SCTRTXQ4CK5PNTF/events.json","paper":"https://pith.science/paper/NGFGZ3V5"},"agent_actions":{"view_html":"https://pith.science/pith/NGFGZ3V5RM7SCTRTXQ4CK5PNTF","download_json":"https://pith.science/pith/NGFGZ3V5RM7SCTRTXQ4CK5PNTF.json","view_paper":"https://pith.science/paper/NGFGZ3V5","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1502.04799&json=true","fetch_graph":"https://pith.science/api/pith-number/NGFGZ3V5RM7SCTRTXQ4CK5PNTF/graph.json","fetch_events":"https://pith.science/api/pith-number/NGFGZ3V5RM7SCTRTXQ4CK5PNTF/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/NGFGZ3V5RM7SCTRTXQ4CK5PNTF/action/timestamp_anchor","attest_storage":"https://pith.science/pith/NGFGZ3V5RM7SCTRTXQ4CK5PNTF/action/storage_attestation","attest_author":"https://pith.science/pith/NGFGZ3V5RM7SCTRTXQ4CK5PNTF/action/author_attestation","sign_citation":"https://pith.science/pith/NGFGZ3V5RM7SCTRTXQ4CK5PNTF/action/citation_signature","submit_replication":"https://pith.science/pith/NGFGZ3V5RM7SCTRTXQ4CK5PNTF/action/replication_record"}},"created_at":"2026-05-18T01:13:28.733989+00:00","updated_at":"2026-05-18T01:13:28.733989+00:00"}