{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:FKUOIR7NDTPUQDI6PIHBJ3PHPS","short_pith_number":"pith:FKUOIR7N","canonical_record":{"source":{"id":"1510.04749","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2015-10-16T00:19:54Z","cross_cats_sorted":[],"title_canon_sha256":"a3254f64b410e3e33257e44aeb5d5f2c790900bb8d0b94e11ff05b0b74b34cde","abstract_canon_sha256":"17bdc14f131096f76de2830cf83a5fefdf106336fdd716cfcf35274604af98a2"},"schema_version":"1.0"},"canonical_sha256":"2aa8e447ed1cdf480d1e7a0e14ede77cb799a1ef0146ecdc9f12fe1e49151261","source":{"kind":"arxiv","id":"1510.04749","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.04749","created_at":"2026-05-18T01:20:33Z"},{"alias_kind":"arxiv_version","alias_value":"1510.04749v1","created_at":"2026-05-18T01:20:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.04749","created_at":"2026-05-18T01:20:33Z"},{"alias_kind":"pith_short_12","alias_value":"FKUOIR7NDTPU","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"FKUOIR7NDTPUQDI6","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"FKUOIR7N","created_at":"2026-05-18T12:29:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:FKUOIR7NDTPUQDI6PIHBJ3PHPS","target":"record","payload":{"canonical_record":{"source":{"id":"1510.04749","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2015-10-16T00:19:54Z","cross_cats_sorted":[],"title_canon_sha256":"a3254f64b410e3e33257e44aeb5d5f2c790900bb8d0b94e11ff05b0b74b34cde","abstract_canon_sha256":"17bdc14f131096f76de2830cf83a5fefdf106336fdd716cfcf35274604af98a2"},"schema_version":"1.0"},"canonical_sha256":"2aa8e447ed1cdf480d1e7a0e14ede77cb799a1ef0146ecdc9f12fe1e49151261","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:20:33.714497Z","signature_b64":"DfDrR6pwb6e6pRSZXSY53itugNP675epCN99kxv1J8MmPiGjHMaAG4z33eS2xTV90Pf6EpvZvZj3YI6Yt2UqDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2aa8e447ed1cdf480d1e7a0e14ede77cb799a1ef0146ecdc9f12fe1e49151261","last_reissued_at":"2026-05-18T01:20:33.714005Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:20:33.714005Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1510.04749","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":"2026-05-18T01:20:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"hYV0WOae6lpaxMsopEPsyOYAPJ28DAS8j+p9Op6ip0ETDgoZ+xz6G5QIyzFkIngIrQbAHW7gzeE9F1VOsQRpAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T21:14:50.882755Z"},"content_sha256":"ee2ad11e26418fe1a6eadac7ef7af228a5c1a567bb4d624fd19fbcc38deb9d7f","schema_version":"1.0","event_id":"sha256:ee2ad11e26418fe1a6eadac7ef7af228a5c1a567bb4d624fd19fbcc38deb9d7f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:FKUOIR7NDTPUQDI6PIHBJ3PHPS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Intersite electron correlations in a Hubbard model on inhomogeneous lattices","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.str-el","authors_text":"Akihisa Koga, Hartmut Hafermann, Nayuta Takemori","submitted_at":"2015-10-16T00:19:54Z","abstract_excerpt":"We study intersite electron correlations in the half-filled Hubbard model on square lattices with periodic and open boundary conditions by means of a real-space dual fermion approach. By calculating renormalization factors, we clarify that nearest-neighbor intersite correlations already significantly reduce the critical interaction. The Mott transition occurs at U/t~6.4, where $U$ is the interaction strength and t is the hopping integral. This value is consistent with the quantum Monte Carlo results. This shows the importance of short-range intersite correlations, which are taken into account "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.04749","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":"2026-05-18T01:20:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3DMgnScaz/L2bqZdenzRt1kIbbHyRc/Hkv/S0Dk+8Ue2bXTHstnOLOZNVPB8jU2zUkc+x5X1o+Wpg8ZuT9jJDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T21:14:50.883478Z"},"content_sha256":"71c19b6bd451ad6db79344b170cfb3006ac05dbc0d2558f24ac98d7f1cc1f5ac","schema_version":"1.0","event_id":"sha256:71c19b6bd451ad6db79344b170cfb3006ac05dbc0d2558f24ac98d7f1cc1f5ac"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FKUOIR7NDTPUQDI6PIHBJ3PHPS/bundle.json","state_url":"https://pith.science/pith/FKUOIR7NDTPUQDI6PIHBJ3PHPS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FKUOIR7NDTPUQDI6PIHBJ3PHPS/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":"2026-05-26T21:14:50Z","links":{"resolver":"https://pith.science/pith/FKUOIR7NDTPUQDI6PIHBJ3PHPS","bundle":"https://pith.science/pith/FKUOIR7NDTPUQDI6PIHBJ3PHPS/bundle.json","state":"https://pith.science/pith/FKUOIR7NDTPUQDI6PIHBJ3PHPS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FKUOIR7NDTPUQDI6PIHBJ3PHPS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:FKUOIR7NDTPUQDI6PIHBJ3PHPS","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":"17bdc14f131096f76de2830cf83a5fefdf106336fdd716cfcf35274604af98a2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2015-10-16T00:19:54Z","title_canon_sha256":"a3254f64b410e3e33257e44aeb5d5f2c790900bb8d0b94e11ff05b0b74b34cde"},"schema_version":"1.0","source":{"id":"1510.04749","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1510.04749","created_at":"2026-05-18T01:20:33Z"},{"alias_kind":"arxiv_version","alias_value":"1510.04749v1","created_at":"2026-05-18T01:20:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1510.04749","created_at":"2026-05-18T01:20:33Z"},{"alias_kind":"pith_short_12","alias_value":"FKUOIR7NDTPU","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"FKUOIR7NDTPUQDI6","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"FKUOIR7N","created_at":"2026-05-18T12:29:19Z"}],"graph_snapshots":[{"event_id":"sha256:71c19b6bd451ad6db79344b170cfb3006ac05dbc0d2558f24ac98d7f1cc1f5ac","target":"graph","created_at":"2026-05-18T01:20:33Z","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":"We study intersite electron correlations in the half-filled Hubbard model on square lattices with periodic and open boundary conditions by means of a real-space dual fermion approach. By calculating renormalization factors, we clarify that nearest-neighbor intersite correlations already significantly reduce the critical interaction. The Mott transition occurs at U/t~6.4, where $U$ is the interaction strength and t is the hopping integral. This value is consistent with the quantum Monte Carlo results. This shows the importance of short-range intersite correlations, which are taken into account ","authors_text":"Akihisa Koga, Hartmut Hafermann, Nayuta Takemori","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2015-10-16T00:19:54Z","title":"Intersite electron correlations in a Hubbard model on inhomogeneous lattices"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1510.04749","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:ee2ad11e26418fe1a6eadac7ef7af228a5c1a567bb4d624fd19fbcc38deb9d7f","target":"record","created_at":"2026-05-18T01:20:33Z","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":"17bdc14f131096f76de2830cf83a5fefdf106336fdd716cfcf35274604af98a2","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2015-10-16T00:19:54Z","title_canon_sha256":"a3254f64b410e3e33257e44aeb5d5f2c790900bb8d0b94e11ff05b0b74b34cde"},"schema_version":"1.0","source":{"id":"1510.04749","kind":"arxiv","version":1}},"canonical_sha256":"2aa8e447ed1cdf480d1e7a0e14ede77cb799a1ef0146ecdc9f12fe1e49151261","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2aa8e447ed1cdf480d1e7a0e14ede77cb799a1ef0146ecdc9f12fe1e49151261","first_computed_at":"2026-05-18T01:20:33.714005Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:20:33.714005Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"DfDrR6pwb6e6pRSZXSY53itugNP675epCN99kxv1J8MmPiGjHMaAG4z33eS2xTV90Pf6EpvZvZj3YI6Yt2UqDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:20:33.714497Z","signed_message":"canonical_sha256_bytes"},"source_id":"1510.04749","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ee2ad11e26418fe1a6eadac7ef7af228a5c1a567bb4d624fd19fbcc38deb9d7f","sha256:71c19b6bd451ad6db79344b170cfb3006ac05dbc0d2558f24ac98d7f1cc1f5ac"],"state_sha256":"455b80cb66e48fd90748fed00da957d0af93f8b5dadd7c9650d62e49d9202194"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"gzV6TsCYz2nWFlFXoYYzaZVVu+22URE5KHb55CqbM0ZA7jlCYSrbcvuz2ttkQZbuluf68c7CmrvMlmTGRRBNAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T21:14:50.887331Z","bundle_sha256":"1b5776659c83daf2dee9eb4b795fa33a2d2857f90f9eb6fc01ed5a4c19662b65"}}