{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:RQIBJTPASYZLZXYQJACYPKT6DX","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":"9210b940209168571bed74e05eb2ccc8f524bfea2fd08abc3bdb545a19e16479","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-06-18T05:38:02Z","title_canon_sha256":"f16117df4e789e3799a9a889a2dc6aeae27be472b144e8d5fd94f8af6e7ee32f"},"schema_version":"1.0","source":{"id":"1206.3830","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1206.3830","created_at":"2026-05-18T03:43:07Z"},{"alias_kind":"arxiv_version","alias_value":"1206.3830v1","created_at":"2026-05-18T03:43:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1206.3830","created_at":"2026-05-18T03:43:07Z"},{"alias_kind":"pith_short_12","alias_value":"RQIBJTPASYZL","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_16","alias_value":"RQIBJTPASYZLZXYQ","created_at":"2026-05-18T12:27:20Z"},{"alias_kind":"pith_short_8","alias_value":"RQIBJTPA","created_at":"2026-05-18T12:27:20Z"}],"graph_snapshots":[{"event_id":"sha256:2d642b95ee0287c483a1f6deb7966b86a28b797c5ca192178417000e3e25f843","target":"graph","created_at":"2026-05-18T03:43:07Z","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 develop qubit Hamiltonian single parameter estimation techniques using a Bayesian approach. The algorithms considered are restricted to projective measurements in a fixed basis, and are derived under the assumption that the qubit measurement is much slower than the characteristic qubit evolution. We optimize a non-adaptive algorithm using particle swarm optimization (PSO) and compare with a previously-developed locally-optimal scheme.","authors_text":"Alexandr Sergeevich, Stephen D. Bartlett","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-06-18T05:38:02Z","title":"Optimizing qubit Hamiltonian parameter estimation algorithms using PSO"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1206.3830","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":"sha256:719a73ce6df5c6b253fab23c039f828500af0166fdbd46f217470329a0f62edb","target":"record","created_at":"2026-05-18T03:43:07Z","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":"9210b940209168571bed74e05eb2ccc8f524bfea2fd08abc3bdb545a19e16479","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-06-18T05:38:02Z","title_canon_sha256":"f16117df4e789e3799a9a889a2dc6aeae27be472b144e8d5fd94f8af6e7ee32f"},"schema_version":"1.0","source":{"id":"1206.3830","kind":"arxiv","version":1}},"canonical_sha256":"8c1014cde09632bcdf10480587aa7e1dc9b4ab403879cab5f1373393ddc87e6a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8c1014cde09632bcdf10480587aa7e1dc9b4ab403879cab5f1373393ddc87e6a","first_computed_at":"2026-05-18T03:43:07.094308Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:43:07.094308Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VhSEFWdXOS3ACnaWZUlaq6gSvOtSnXB2kp2spxoaBMOPavcnjlNcm9IFHup1DQG8AOy8Q0KHgS3rgWZqWxUrBA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:43:07.095001Z","signed_message":"canonical_sha256_bytes"},"source_id":"1206.3830","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:719a73ce6df5c6b253fab23c039f828500af0166fdbd46f217470329a0f62edb","sha256:2d642b95ee0287c483a1f6deb7966b86a28b797c5ca192178417000e3e25f843"],"state_sha256":"f98e55f830134a7acfbf846fb74755df68dabc770cae98e98a4016150ab60d7b"}