{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2010:WHKAYWB2V523ARTAC7EDY2VR5Z","short_pith_number":"pith:WHKAYWB2","canonical_record":{"source":{"id":"1004.4650","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2010-04-26T20:45:05Z","cross_cats_sorted":[],"title_canon_sha256":"af14937b0ad38dfc0a1c7c385bc9a4a6affb85483268bcc1e13d53d6712275bf","abstract_canon_sha256":"0455edf07d4008334c96b9f17634ee618398d2c00536d29991ed74185605e3b1"},"schema_version":"1.0"},"canonical_sha256":"b1d40c583aaf75b0466017c83c6ab1ee4157adce801d4dd751e71597736c9f57","source":{"kind":"arxiv","id":"1004.4650","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1004.4650","created_at":"2026-05-18T02:07:53Z"},{"alias_kind":"arxiv_version","alias_value":"1004.4650v1","created_at":"2026-05-18T02:07:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1004.4650","created_at":"2026-05-18T02:07:53Z"},{"alias_kind":"pith_short_12","alias_value":"WHKAYWB2V523","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_16","alias_value":"WHKAYWB2V523ARTA","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_8","alias_value":"WHKAYWB2","created_at":"2026-05-18T12:26:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2010:WHKAYWB2V523ARTAC7EDY2VR5Z","target":"record","payload":{"canonical_record":{"source":{"id":"1004.4650","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2010-04-26T20:45:05Z","cross_cats_sorted":[],"title_canon_sha256":"af14937b0ad38dfc0a1c7c385bc9a4a6affb85483268bcc1e13d53d6712275bf","abstract_canon_sha256":"0455edf07d4008334c96b9f17634ee618398d2c00536d29991ed74185605e3b1"},"schema_version":"1.0"},"canonical_sha256":"b1d40c583aaf75b0466017c83c6ab1ee4157adce801d4dd751e71597736c9f57","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:07:53.584398Z","signature_b64":"KWDk7KVh72FMZNGGyoigtacd85FbKlu1prhZylui9DTMZQq6fMK2tEyGblwqXnHmzCDtNC7C7j51LDnVFyNtAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b1d40c583aaf75b0466017c83c6ab1ee4157adce801d4dd751e71597736c9f57","last_reissued_at":"2026-05-18T02:07:53.583849Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:07:53.583849Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1004.4650","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":"2026-05-18T02:07:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"evsnuClIWbeUeAMEaLdsUu5dIvTtrTHv96WtXvv9SGRFm9MtFsOsY3oE8IksWOGpJjcEBMkuDQPJwL/QN7lrAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T22:08:20.749642Z"},"content_sha256":"60669d5f19eefc1dd70e9fd5b70fd799d6138ad4d00ac5edd98f2525085247d6","schema_version":"1.0","event_id":"sha256:60669d5f19eefc1dd70e9fd5b70fd799d6138ad4d00ac5edd98f2525085247d6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2010:WHKAYWB2V523ARTAC7EDY2VR5Z","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ferromagnetism of cold fermions loaded into a decorated square lattice","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cond-mat.quant-gas","authors_text":"Akihisa Koga, Kazuto Noda, Norio Kawakami, Thomas Pruschke","submitted_at":"2010-04-26T20:45:05Z","abstract_excerpt":"We investigate two-component ultracold fermions loaded into a decorated square lattice, which are described by the Hubbard model with repulsive interactions and nearest neighbor hoppings. By combining the real-space dynamical mean-field theory with the numerical renormalization group method, we discuss how a ferromagnetically ordered ground state in the weak coupling regime, which originates from the existence of a dispersionless band, is adiabatically connected to a Heisenberg ferrimagnetic state in the strong coupling limit. The effects of level splitting and  hopping imbalance are also addr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.4650","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":"2026-05-18T02:07:53Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"TCCkZwDT2ITHiEI78y1jbOO3msP7lYvUbIPlxS08rv3AxMOT1515dV7Lxk6+kS1QYhoz0Epf2F6LdLD2hWsGDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-26T22:08:20.750352Z"},"content_sha256":"52aacb62fb42c748606a6d53d9c360013abb077ff7fef998d76be23a96fd462c","schema_version":"1.0","event_id":"sha256:52aacb62fb42c748606a6d53d9c360013abb077ff7fef998d76be23a96fd462c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/WHKAYWB2V523ARTAC7EDY2VR5Z/bundle.json","state_url":"https://pith.science/pith/WHKAYWB2V523ARTAC7EDY2VR5Z/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/WHKAYWB2V523ARTAC7EDY2VR5Z/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":"2026-05-26T22:08:20Z","links":{"resolver":"https://pith.science/pith/WHKAYWB2V523ARTAC7EDY2VR5Z","bundle":"https://pith.science/pith/WHKAYWB2V523ARTAC7EDY2VR5Z/bundle.json","state":"https://pith.science/pith/WHKAYWB2V523ARTAC7EDY2VR5Z/state.json","well_known_bundle":"https://pith.science/.well-known/pith/WHKAYWB2V523ARTAC7EDY2VR5Z/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2010:WHKAYWB2V523ARTAC7EDY2VR5Z","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":"0455edf07d4008334c96b9f17634ee618398d2c00536d29991ed74185605e3b1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2010-04-26T20:45:05Z","title_canon_sha256":"af14937b0ad38dfc0a1c7c385bc9a4a6affb85483268bcc1e13d53d6712275bf"},"schema_version":"1.0","source":{"id":"1004.4650","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1004.4650","created_at":"2026-05-18T02:07:53Z"},{"alias_kind":"arxiv_version","alias_value":"1004.4650v1","created_at":"2026-05-18T02:07:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1004.4650","created_at":"2026-05-18T02:07:53Z"},{"alias_kind":"pith_short_12","alias_value":"WHKAYWB2V523","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_16","alias_value":"WHKAYWB2V523ARTA","created_at":"2026-05-18T12:26:15Z"},{"alias_kind":"pith_short_8","alias_value":"WHKAYWB2","created_at":"2026-05-18T12:26:15Z"}],"graph_snapshots":[{"event_id":"sha256:52aacb62fb42c748606a6d53d9c360013abb077ff7fef998d76be23a96fd462c","target":"graph","created_at":"2026-05-18T02:07:53Z","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 investigate two-component ultracold fermions loaded into a decorated square lattice, which are described by the Hubbard model with repulsive interactions and nearest neighbor hoppings. By combining the real-space dynamical mean-field theory with the numerical renormalization group method, we discuss how a ferromagnetically ordered ground state in the weak coupling regime, which originates from the existence of a dispersionless band, is adiabatically connected to a Heisenberg ferrimagnetic state in the strong coupling limit. The effects of level splitting and  hopping imbalance are also addr","authors_text":"Akihisa Koga, Kazuto Noda, Norio Kawakami, Thomas Pruschke","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2010-04-26T20:45:05Z","title":"Ferromagnetism of cold fermions loaded into a decorated square lattice"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1004.4650","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":"sha256:60669d5f19eefc1dd70e9fd5b70fd799d6138ad4d00ac5edd98f2525085247d6","target":"record","created_at":"2026-05-18T02:07:53Z","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":"0455edf07d4008334c96b9f17634ee618398d2c00536d29991ed74185605e3b1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2010-04-26T20:45:05Z","title_canon_sha256":"af14937b0ad38dfc0a1c7c385bc9a4a6affb85483268bcc1e13d53d6712275bf"},"schema_version":"1.0","source":{"id":"1004.4650","kind":"arxiv","version":1}},"canonical_sha256":"b1d40c583aaf75b0466017c83c6ab1ee4157adce801d4dd751e71597736c9f57","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b1d40c583aaf75b0466017c83c6ab1ee4157adce801d4dd751e71597736c9f57","first_computed_at":"2026-05-18T02:07:53.583849Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:07:53.583849Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"KWDk7KVh72FMZNGGyoigtacd85FbKlu1prhZylui9DTMZQq6fMK2tEyGblwqXnHmzCDtNC7C7j51LDnVFyNtAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:07:53.584398Z","signed_message":"canonical_sha256_bytes"},"source_id":"1004.4650","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:60669d5f19eefc1dd70e9fd5b70fd799d6138ad4d00ac5edd98f2525085247d6","sha256:52aacb62fb42c748606a6d53d9c360013abb077ff7fef998d76be23a96fd462c"],"state_sha256":"20855fcab4c0fa85270dce5a811b877bf4f0f2143f5c4b073b0a2e64aef6fa55"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ao0Q9c2TQdlmTlmAZHxxgBGZJmlRWPaB7jDB72SwSxW6fQjyw//tRXzIQaetrq3x0M51TNlztZVHnVzluKBxAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-26T22:08:20.754100Z","bundle_sha256":"68cb0d39646abdb487d2361dc41f3ad1da0e6e0798044f69350446f3d8e8dba7"}}