{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2013:SU5W6WNNYE2DPJ7QNQTQX55X7Q","short_pith_number":"pith:SU5W6WNN","canonical_record":{"source":{"id":"1305.3210","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-05-14T17:03:15Z","cross_cats_sorted":["cond-mat.supr-con"],"title_canon_sha256":"995e8f111f88189b2217fb2364f3dde2a9063c41240bf4dcba749277385d361e","abstract_canon_sha256":"4adb338e71c45d23f06838e7b97036d212ba81aa7f1de136e8ae43c08230be16"},"schema_version":"1.0"},"canonical_sha256":"953b6f59adc13437a7f06c270bf7b7fc2a69ed01c5c329874aa00580c84d1a48","source":{"kind":"arxiv","id":"1305.3210","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1305.3210","created_at":"2026-05-18T03:25:44Z"},{"alias_kind":"arxiv_version","alias_value":"1305.3210v1","created_at":"2026-05-18T03:25:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.3210","created_at":"2026-05-18T03:25:44Z"},{"alias_kind":"pith_short_12","alias_value":"SU5W6WNNYE2D","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_16","alias_value":"SU5W6WNNYE2DPJ7Q","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_8","alias_value":"SU5W6WNN","created_at":"2026-05-18T12:27:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2013:SU5W6WNNYE2DPJ7QNQTQX55X7Q","target":"record","payload":{"canonical_record":{"source":{"id":"1305.3210","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-05-14T17:03:15Z","cross_cats_sorted":["cond-mat.supr-con"],"title_canon_sha256":"995e8f111f88189b2217fb2364f3dde2a9063c41240bf4dcba749277385d361e","abstract_canon_sha256":"4adb338e71c45d23f06838e7b97036d212ba81aa7f1de136e8ae43c08230be16"},"schema_version":"1.0"},"canonical_sha256":"953b6f59adc13437a7f06c270bf7b7fc2a69ed01c5c329874aa00580c84d1a48","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:25:44.476830Z","signature_b64":"H0JLBq8G6fMVhTHrEXo9xLR54TWBkWJoTkV82W3bYkJXEykYSltPI/vWED7ojkSmRvhTa/eWPvFJ7xM7H+NVDA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"953b6f59adc13437a7f06c270bf7b7fc2a69ed01c5c329874aa00580c84d1a48","last_reissued_at":"2026-05-18T03:25:44.476113Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:25:44.476113Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1305.3210","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:25:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"R9v1l2XMFIuXOVRQeRy+FCu0Jm2L8YJ7zKvy88vy5dpAj4e3NtFSUhjp6F53BjmlVj7G1vuISZpvByrb/eT9DA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T03:26:09.051291Z"},"content_sha256":"0db64ece17ff20bbfac1f68a956211a94b389e2364dae4d50a7485bb00eac558","schema_version":"1.0","event_id":"sha256:0db64ece17ff20bbfac1f68a956211a94b389e2364dae4d50a7485bb00eac558"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2013:SU5W6WNNYE2DPJ7QNQTQX55X7Q","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Specific heat of a non-local attractive Hubbard model","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.supr-con"],"primary_cat":"cond-mat.str-el","authors_text":"A. Troper, C. M. Chaves, C. O. Lobo, E. J. Calegari, S. G. Magalhaes","submitted_at":"2013-05-14T17:03:15Z","abstract_excerpt":"The specific heat of an attractive (interaction $G<0$) non-local Hubbard model is investigated. We use a two-pole approximation which leads to a set of correlation functions. In particular, the correlation function $\\ <\\vec{S}_i\\cdot\\vec{S}_j\\ >$ plays an important role as a source of anomalies in the normal state of the model. Our results show that for a giving range of $G$ and $\\delta$ where $\\delta=1-n_T$ ($n_T=n_{\\uparrow}+n_{\\downarrow}$), the specific heat as a function of the temperature presents a two peak structure. Nevertehelesss, the presence of a pseudogap on the anti-nodal points "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.3210","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:25:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"763qC1Y1BfMMx5ouXulb+RXiM9O1LJAcgQUmSSi0fQid555WladAna/oYFArGv4P/Tpwdv1vm1ll785ETiwrBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T03:26:09.051972Z"},"content_sha256":"0cc94df53f6ab4f59defa64cecc35d1836cd5d7df4501ebe26f5f650795a6a25","schema_version":"1.0","event_id":"sha256:0cc94df53f6ab4f59defa64cecc35d1836cd5d7df4501ebe26f5f650795a6a25"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SU5W6WNNYE2DPJ7QNQTQX55X7Q/bundle.json","state_url":"https://pith.science/pith/SU5W6WNNYE2DPJ7QNQTQX55X7Q/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SU5W6WNNYE2DPJ7QNQTQX55X7Q/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-05T03:26:09Z","links":{"resolver":"https://pith.science/pith/SU5W6WNNYE2DPJ7QNQTQX55X7Q","bundle":"https://pith.science/pith/SU5W6WNNYE2DPJ7QNQTQX55X7Q/bundle.json","state":"https://pith.science/pith/SU5W6WNNYE2DPJ7QNQTQX55X7Q/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SU5W6WNNYE2DPJ7QNQTQX55X7Q/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2013:SU5W6WNNYE2DPJ7QNQTQX55X7Q","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"4adb338e71c45d23f06838e7b97036d212ba81aa7f1de136e8ae43c08230be16","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-05-14T17:03:15Z","title_canon_sha256":"995e8f111f88189b2217fb2364f3dde2a9063c41240bf4dcba749277385d361e"},"schema_version":"1.0","source":{"id":"1305.3210","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1305.3210","created_at":"2026-05-18T03:25:44Z"},{"alias_kind":"arxiv_version","alias_value":"1305.3210v1","created_at":"2026-05-18T03:25:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1305.3210","created_at":"2026-05-18T03:25:44Z"},{"alias_kind":"pith_short_12","alias_value":"SU5W6WNNYE2D","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_16","alias_value":"SU5W6WNNYE2DPJ7Q","created_at":"2026-05-18T12:27:59Z"},{"alias_kind":"pith_short_8","alias_value":"SU5W6WNN","created_at":"2026-05-18T12:27:59Z"}],"graph_snapshots":[{"event_id":"sha256:0cc94df53f6ab4f59defa64cecc35d1836cd5d7df4501ebe26f5f650795a6a25","target":"graph","created_at":"2026-05-18T03:25:44Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"The specific heat of an attractive (interaction $G<0$) non-local Hubbard model is investigated. We use a two-pole approximation which leads to a set of correlation functions. In particular, the correlation function $\\ <\\vec{S}_i\\cdot\\vec{S}_j\\ >$ plays an important role as a source of anomalies in the normal state of the model. Our results show that for a giving range of $G$ and $\\delta$ where $\\delta=1-n_T$ ($n_T=n_{\\uparrow}+n_{\\downarrow}$), the specific heat as a function of the temperature presents a two peak structure. Nevertehelesss, the presence of a pseudogap on the anti-nodal points ","authors_text":"A. Troper, C. M. Chaves, C. O. Lobo, E. J. Calegari, S. G. Magalhaes","cross_cats":["cond-mat.supr-con"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-05-14T17:03:15Z","title":"Specific heat of a non-local attractive Hubbard model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1305.3210","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:0db64ece17ff20bbfac1f68a956211a94b389e2364dae4d50a7485bb00eac558","target":"record","created_at":"2026-05-18T03:25:44Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"4adb338e71c45d23f06838e7b97036d212ba81aa7f1de136e8ae43c08230be16","cross_cats_sorted":["cond-mat.supr-con"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2013-05-14T17:03:15Z","title_canon_sha256":"995e8f111f88189b2217fb2364f3dde2a9063c41240bf4dcba749277385d361e"},"schema_version":"1.0","source":{"id":"1305.3210","kind":"arxiv","version":1}},"canonical_sha256":"953b6f59adc13437a7f06c270bf7b7fc2a69ed01c5c329874aa00580c84d1a48","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"953b6f59adc13437a7f06c270bf7b7fc2a69ed01c5c329874aa00580c84d1a48","first_computed_at":"2026-05-18T03:25:44.476113Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:25:44.476113Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"H0JLBq8G6fMVhTHrEXo9xLR54TWBkWJoTkV82W3bYkJXEykYSltPI/vWED7ojkSmRvhTa/eWPvFJ7xM7H+NVDA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:25:44.476830Z","signed_message":"canonical_sha256_bytes"},"source_id":"1305.3210","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0db64ece17ff20bbfac1f68a956211a94b389e2364dae4d50a7485bb00eac558","sha256:0cc94df53f6ab4f59defa64cecc35d1836cd5d7df4501ebe26f5f650795a6a25"],"state_sha256":"8ac9ccc69767d45ea78b1071bd9b6aea7ca0daf5870363383ee234c892ccd453"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"bbOR1h8yCNWmsrC0+GwUtp69d6oydc4uEQ/uwtaetkTMQePe6rb5oNSyUW567twt2bYWp+QvYANlug5oZ+A6CA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T03:26:09.055226Z","bundle_sha256":"a550ab596338167c43286b4591e2695235a8178528d3fdf4019155dad23bf8ca"}}