{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:M6Z74H3NSQUT4KGEQVOQ2PWZUY","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":"02f9a0b77ea87bdbf0c9f3dbe61183d8b03759336da5c0e67e9f5d4a6135d579","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2012-11-11T22:45:09Z","title_canon_sha256":"ea0705a1ad3d99f68b5967c9d75a3041f99ede3a060bb110f1b8a5e1c6db7a9e"},"schema_version":"1.0","source":{"id":"1211.2474","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.2474","created_at":"2026-05-18T03:29:50Z"},{"alias_kind":"arxiv_version","alias_value":"1211.2474v1","created_at":"2026-05-18T03:29:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.2474","created_at":"2026-05-18T03:29:50Z"},{"alias_kind":"pith_short_12","alias_value":"M6Z74H3NSQUT","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_16","alias_value":"M6Z74H3NSQUT4KGE","created_at":"2026-05-18T12:27:14Z"},{"alias_kind":"pith_short_8","alias_value":"M6Z74H3N","created_at":"2026-05-18T12:27:14Z"}],"graph_snapshots":[{"event_id":"sha256:e1f14bba88b94b3554ffb5a3af0698a96e294c7c6e315f9a3669d852902bf9d0","target":"graph","created_at":"2026-05-18T03:29:50Z","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 consider the von Neumann and R\\'enyi entropies of the one dimensional quarter-filled Hubbard model. We observe that for periodic boundary conditions the entropies exhibit an unexpected dependence on system size: for L=4 mod 8 the results are in agreement with expectations based on conformal field theory, while for L=0 mod 8 additional contributions arise. We explain this observation in terms of a shell-filling effect, and develop a conformal field theory approach to calculate the extra term in the entropies. Similar shell filling effects in entanglement entropies are expected to be present ","authors_text":"Andreas M. L\\\"auchli, Fabian H. L. Essler, Pasquale Calabrese","cross_cats":["quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2012-11-11T22:45:09Z","title":"Shell-Filling Effect in the Entanglement Entropies of Spinful Fermions"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.2474","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":"sha256:5ed0cc42bf70e33fe2b554702ac240e6ec68f93a8c9d3e6f12e5f2314c394ee5","target":"record","created_at":"2026-05-18T03:29:50Z","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":"02f9a0b77ea87bdbf0c9f3dbe61183d8b03759336da5c0e67e9f5d4a6135d579","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cond-mat.str-el","submitted_at":"2012-11-11T22:45:09Z","title_canon_sha256":"ea0705a1ad3d99f68b5967c9d75a3041f99ede3a060bb110f1b8a5e1c6db7a9e"},"schema_version":"1.0","source":{"id":"1211.2474","kind":"arxiv","version":1}},"canonical_sha256":"67b3fe1f6d94293e28c4855d0d3ed9a60bb553de7f408ef9438cc56f6c535454","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"67b3fe1f6d94293e28c4855d0d3ed9a60bb553de7f408ef9438cc56f6c535454","first_computed_at":"2026-05-18T03:29:50.671710Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:29:50.671710Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Vn/6aPHjvle68cyQ1qARqHAywAWS7Rf2gx86bgYMtojQG61b/mC1HPYha83rrrHC9B7jKrH8dr1LRwuV+x8xCw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:29:50.672492Z","signed_message":"canonical_sha256_bytes"},"source_id":"1211.2474","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5ed0cc42bf70e33fe2b554702ac240e6ec68f93a8c9d3e6f12e5f2314c394ee5","sha256:e1f14bba88b94b3554ffb5a3af0698a96e294c7c6e315f9a3669d852902bf9d0"],"state_sha256":"98c7356802f7124bb5b952df26f7dec3cbd9b7c1b81361646be655677640258e"}