{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:IZ3SCRXRCPU4MCWADJMZPOUQZX","short_pith_number":"pith:IZ3SCRXR","schema_version":"1.0","canonical_sha256":"46772146f113e9c60ac01a5997ba90cdc5f64343192a89ce40aca381cd6d3014","source":{"kind":"arxiv","id":"0903.5261","version":1},"attestation_state":"computed","paper":{"title":"Metric approach to quantum constraints","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Anna C.T. Gustavsson, Dorje C. Brody, Lane P. Hughston","submitted_at":"2009-03-30T16:43:22Z","abstract_excerpt":"A new framework for deriving equations of motion for constrained quantum systems is introduced, and a procedure for its implementation is outlined. In special cases the framework reduces to a quantum analogue of the Dirac theory of constrains in classical mechanics. Explicit examples involving spin-1/2 particles are worked out in detail: in one example our approach coincides with a quantum version of the Dirac formalism, while the other example illustrates how a situation that cannot be treated by Dirac's approach can nevertheless be dealt with in the present scheme."},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"0903.5261","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-03-30T16:43:22Z","cross_cats_sorted":[],"title_canon_sha256":"a5a35d17162615c08e45c6b1ce8731fc5e4f70e34368b99da314bf7868c81d2e","abstract_canon_sha256":"8938d673c8dbf11184d4373cc02ca6150d7c5c09217baebf899344343f387893"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:13:34.420095Z","signature_b64":"ot+KXRwm4Kkz0JR7pb8YzzqzxhMwetE0C9C3KgwzVEWUT/Dy51ZEtyGyy0bM7jSTXa3isjg5G+PYO4wWkdSvAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"46772146f113e9c60ac01a5997ba90cdc5f64343192a89ce40aca381cd6d3014","last_reissued_at":"2026-05-18T03:13:34.419462Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:13:34.419462Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Metric approach to quantum constraints","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Anna C.T. Gustavsson, Dorje C. Brody, Lane P. Hughston","submitted_at":"2009-03-30T16:43:22Z","abstract_excerpt":"A new framework for deriving equations of motion for constrained quantum systems is introduced, and a procedure for its implementation is outlined. In special cases the framework reduces to a quantum analogue of the Dirac theory of constrains in classical mechanics. Explicit examples involving spin-1/2 particles are worked out in detail: in one example our approach coincides with a quantum version of the Dirac formalism, while the other example illustrates how a situation that cannot be treated by Dirac's approach can nevertheless be dealt with in the present scheme."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0903.5261","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"0903.5261","created_at":"2026-05-18T03:13:34.419559+00:00"},{"alias_kind":"arxiv_version","alias_value":"0903.5261v1","created_at":"2026-05-18T03:13:34.419559+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0903.5261","created_at":"2026-05-18T03:13:34.419559+00:00"},{"alias_kind":"pith_short_12","alias_value":"IZ3SCRXRCPU4","created_at":"2026-05-18T12:26:00.592388+00:00"},{"alias_kind":"pith_short_16","alias_value":"IZ3SCRXRCPU4MCWA","created_at":"2026-05-18T12:26:00.592388+00:00"},{"alias_kind":"pith_short_8","alias_value":"IZ3SCRXR","created_at":"2026-05-18T12:26:00.592388+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/IZ3SCRXRCPU4MCWADJMZPOUQZX","json":"https://pith.science/pith/IZ3SCRXRCPU4MCWADJMZPOUQZX.json","graph_json":"https://pith.science/api/pith-number/IZ3SCRXRCPU4MCWADJMZPOUQZX/graph.json","events_json":"https://pith.science/api/pith-number/IZ3SCRXRCPU4MCWADJMZPOUQZX/events.json","paper":"https://pith.science/paper/IZ3SCRXR"},"agent_actions":{"view_html":"https://pith.science/pith/IZ3SCRXRCPU4MCWADJMZPOUQZX","download_json":"https://pith.science/pith/IZ3SCRXRCPU4MCWADJMZPOUQZX.json","view_paper":"https://pith.science/paper/IZ3SCRXR","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0903.5261&json=true","fetch_graph":"https://pith.science/api/pith-number/IZ3SCRXRCPU4MCWADJMZPOUQZX/graph.json","fetch_events":"https://pith.science/api/pith-number/IZ3SCRXRCPU4MCWADJMZPOUQZX/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/IZ3SCRXRCPU4MCWADJMZPOUQZX/action/timestamp_anchor","attest_storage":"https://pith.science/pith/IZ3SCRXRCPU4MCWADJMZPOUQZX/action/storage_attestation","attest_author":"https://pith.science/pith/IZ3SCRXRCPU4MCWADJMZPOUQZX/action/author_attestation","sign_citation":"https://pith.science/pith/IZ3SCRXRCPU4MCWADJMZPOUQZX/action/citation_signature","submit_replication":"https://pith.science/pith/IZ3SCRXRCPU4MCWADJMZPOUQZX/action/replication_record"}},"created_at":"2026-05-18T03:13:34.419559+00:00","updated_at":"2026-05-18T03:13:34.419559+00:00"}