{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:XYQVH33UGVQLKG4MZDZBO3D67P","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":"47f2ed45b4c65c05216e7fc93325cb6f23bcbcf5e177dea9c8896223c3562515","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-04-27T10:09:02Z","title_canon_sha256":"f05a635ce6a7f1e73505da497ea9fcd1b72c8e8323aeeeda1783bc37bce10156"},"schema_version":"1.0","source":{"id":"1904.12139","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.12139","created_at":"2026-07-05T06:48:00Z"},{"alias_kind":"arxiv_version","alias_value":"1904.12139v2","created_at":"2026-07-05T06:48:00Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.12139","created_at":"2026-07-05T06:48:00Z"},{"alias_kind":"pith_short_12","alias_value":"XYQVH33UGVQL","created_at":"2026-07-05T06:48:00Z"},{"alias_kind":"pith_short_16","alias_value":"XYQVH33UGVQLKG4M","created_at":"2026-07-05T06:48:00Z"},{"alias_kind":"pith_short_8","alias_value":"XYQVH33U","created_at":"2026-07-05T06:48:00Z"}],"graph_snapshots":[{"event_id":"sha256:b75e0501866836ea156679b47d812f31a69b74bf5af7711a034bfa60c6cb35ea","target":"graph","created_at":"2026-07-05T06:48:00Z","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/1904.12139/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Quantum annealing is a promising heuristic method to solve combinatorial optimization problems, and efforts to quantify performance on real-world problems provide insights into how this approach may be best used in practice. We investigate the empirical performance of quantum annealing to solve the Nurse Scheduling Problem (NSP) with hard constraints using the D-Wave 2000Q quantum annealing device. NSP seeks the optimal assignment for a set of nurses to shifts under an accompanying set of constraints on schedule and personnel. After reducing NSP to a novel Ising-type Hamiltonian, we evaluate t","authors_text":"Kazuki Ikeda, Travis S. Humble, Yuma Nakamura","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-04-27T10:09:02Z","title":"Application of Quantum Annealing to Nurse Scheduling Problem"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.12139","kind":"arxiv","version":2},"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:f80dc9a328448d90e440287ab5ebddb1e61596fcdd11ac5c35e5953780cc1096","target":"record","created_at":"2026-07-05T06:48:00Z","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":"47f2ed45b4c65c05216e7fc93325cb6f23bcbcf5e177dea9c8896223c3562515","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-04-27T10:09:02Z","title_canon_sha256":"f05a635ce6a7f1e73505da497ea9fcd1b72c8e8323aeeeda1783bc37bce10156"},"schema_version":"1.0","source":{"id":"1904.12139","kind":"arxiv","version":2}},"canonical_sha256":"be2153ef743560b51b8cc8f2176c7efbf83fde8022f7c6ddf14db75ed2ecf206","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"be2153ef743560b51b8cc8f2176c7efbf83fde8022f7c6ddf14db75ed2ecf206","first_computed_at":"2026-07-05T06:48:00.496866Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:48:00.496866Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Qoc9jIHMiIhmt5EspxGhndPWaY0Up5zq5F0WRNJ4yLmSoyf1Z4US/fnfRSsIJAKFvd5W6ZVxLERsW6h04OCqCQ==","signature_status":"signed_v1","signed_at":"2026-07-05T06:48:00.497210Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.12139","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:f80dc9a328448d90e440287ab5ebddb1e61596fcdd11ac5c35e5953780cc1096","sha256:b75e0501866836ea156679b47d812f31a69b74bf5af7711a034bfa60c6cb35ea"],"state_sha256":"3ea9b7380f230467336c5cf3ec7aa6b059cbeeb7bb7ef57541410d8b0ae2705e"}