{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:3GQ4XE75QZCNLFMTARS2HCS3UB","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":"8fbe7ac5e104192b16be9b049ef66a325750e73737740e8c042d36d968dd1569","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2020-11-30T04:20:49Z","title_canon_sha256":"2399e9d567b8a64281346e2058fc971107fcfe80a89480f2404c069ac688285c"},"schema_version":"1.0","source":{"id":"2011.14538","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2011.14538","created_at":"2026-07-05T02:45:19Z"},{"alias_kind":"arxiv_version","alias_value":"2011.14538v1","created_at":"2026-07-05T02:45:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2011.14538","created_at":"2026-07-05T02:45:19Z"},{"alias_kind":"pith_short_12","alias_value":"3GQ4XE75QZCN","created_at":"2026-07-05T02:45:19Z"},{"alias_kind":"pith_short_16","alias_value":"3GQ4XE75QZCNLFMT","created_at":"2026-07-05T02:45:19Z"},{"alias_kind":"pith_short_8","alias_value":"3GQ4XE75","created_at":"2026-07-05T02:45:19Z"}],"graph_snapshots":[{"event_id":"sha256:9b3ba13eb5c2a74f19cc8a7a7bf06da5e514f74fb30dc06e167a369f5a421ce7","target":"graph","created_at":"2026-07-05T02:45:19Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2011.14538/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We study properties of the lowest energy states at non-zero total momentum (yrast states) of the Hubbard model for spin-1/2 fermions in the quantum ring configuration with attractive on-site interaction at low density. In the one-dimensional (1D) case we solve the Hubbard model using the Bethe ansatz, while for the crossover into the 2D regime we use the Full-Configuration-Interaction Quantum Monte-Carlo method (FCIQMC) to obtain the yrast states for the spin-balanced Fermi system. We show how the yrast excitation spectrum changes from the 1D to the 2D regime and how pairing affects the yrast ","authors_text":"Ali Alavi, Joachim Brand, Ulrich Ebling","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2020-11-30T04:20:49Z","title":"Signatures of the BCS-BEC crossover in the yrast spectra of Fermi quantum rings"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2011.14538","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":"sha256:45c7e44797c0f1afc38f7689e209f8bd79afb1c30e7a1b254e3dd2cfe0950caf","target":"record","created_at":"2026-07-05T02:45:19Z","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":"8fbe7ac5e104192b16be9b049ef66a325750e73737740e8c042d36d968dd1569","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"cond-mat.quant-gas","submitted_at":"2020-11-30T04:20:49Z","title_canon_sha256":"2399e9d567b8a64281346e2058fc971107fcfe80a89480f2404c069ac688285c"},"schema_version":"1.0","source":{"id":"2011.14538","kind":"arxiv","version":1}},"canonical_sha256":"d9a1cb93fd8644d595930465a38a5ba04b810af11e290136b028902c7770f444","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d9a1cb93fd8644d595930465a38a5ba04b810af11e290136b028902c7770f444","first_computed_at":"2026-07-05T02:45:19.151049Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:45:19.151049Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"I5RRZiwNAFYUUPYgL4C3zrivS+BKVxuqMIdvl4k4W/2omXTxurFOZGLqWYnaejsvc99fxPrXLObEn6lpbbfEBA==","signature_status":"signed_v1","signed_at":"2026-07-05T02:45:19.151535Z","signed_message":"canonical_sha256_bytes"},"source_id":"2011.14538","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:45c7e44797c0f1afc38f7689e209f8bd79afb1c30e7a1b254e3dd2cfe0950caf","sha256:9b3ba13eb5c2a74f19cc8a7a7bf06da5e514f74fb30dc06e167a369f5a421ce7"],"state_sha256":"4b66bea4d14812c94fa66daef0d61cdd99fb4976c7ec5b522e9618b7123a1bbd"}