{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2000:NCKQ6JGGSHWOOB3LVDXAMYJXB4","short_pith_number":"pith:NCKQ6JGG","canonical_record":{"source":{"id":"quant-ph/0002071","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"2000-02-24T22:54:52Z","cross_cats_sorted":[],"title_canon_sha256":"c59b456a13c2053b1181840fb5c636b1fecf6636c0467408a9a9c444586e783d","abstract_canon_sha256":"c99ac072baaae058b242ccdb077750f0bcdc2b41bd6ca4221573e319f53abef2"},"schema_version":"1.0"},"canonical_sha256":"68950f24c691ece7076ba8ee0661370f0e4f37b85ea2938f1277801d7e4ae648","source":{"kind":"arxiv","id":"quant-ph/0002071","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/0002071","created_at":"2026-05-18T03:31:07Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/0002071v2","created_at":"2026-05-18T03:31:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/0002071","created_at":"2026-05-18T03:31:07Z"},{"alias_kind":"pith_short_12","alias_value":"NCKQ6JGGSHWO","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"NCKQ6JGGSHWOOB3L","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"NCKQ6JGG","created_at":"2026-05-18T12:25:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2000:NCKQ6JGGSHWOOB3LVDXAMYJXB4","target":"record","payload":{"canonical_record":{"source":{"id":"quant-ph/0002071","kind":"arxiv","version":2},"metadata":{"license":"","primary_cat":"quant-ph","submitted_at":"2000-02-24T22:54:52Z","cross_cats_sorted":[],"title_canon_sha256":"c59b456a13c2053b1181840fb5c636b1fecf6636c0467408a9a9c444586e783d","abstract_canon_sha256":"c99ac072baaae058b242ccdb077750f0bcdc2b41bd6ca4221573e319f53abef2"},"schema_version":"1.0"},"canonical_sha256":"68950f24c691ece7076ba8ee0661370f0e4f37b85ea2938f1277801d7e4ae648","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:31:07.393953Z","signature_b64":"rfIWv8064SdHAOwTQWc6Fa7/moOORHDfn3bcq/zuY1Ay4IiMzyBBWsZtiApMpTCEET4CT/EPJOz+JWBw4Ch1DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"68950f24c691ece7076ba8ee0661370f0e4f37b85ea2938f1277801d7e4ae648","last_reissued_at":"2026-05-18T03:31:07.393552Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:31:07.393552Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"quant-ph/0002071","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:31:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jwK4U2zPEYp4v/u1vWhCdM+SL4tj+su2lo7rV1/NkB7fYFfKtAk/5GWHmPhYQX0PAZ00zUzLAe7bVvddEElwCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T11:07:45.780849Z"},"content_sha256":"27a93e8af457da94ef5a12b7a28097014fa2d3a3ba9c5813d3717750fa809577","schema_version":"1.0","event_id":"sha256:27a93e8af457da94ef5a12b7a28097014fa2d3a3ba9c5813d3717750fa809577"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2000:NCKQ6JGGSHWOOB3LVDXAMYJXB4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Nonextensive approach to decoherence in quantum mechanics","license":"","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"A. Vidiella-Barranco, H. Moya-Cessa (INAOE, Mexico), Pue., Puebla","submitted_at":"2000-02-24T22:54:52Z","abstract_excerpt":"We propose a nonextensive generalization (q parametrized) of the von Neumann equation for the density operator. Our model naturally leads to the phenomenon of decoherence, and unitary evolution is recovered in the limit of q -> 1. The resulting evolution yields a nonexponential decay for quantum coherences, fact that might be attributed to nonextensivity. We discuss, as an example, the loss of coherence observed in trapped ions."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/0002071","kind":"arxiv","version":2},"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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:31:07Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2TsFiGWXNMmpe3QXWA97qAAHhCnklmdBXQOzkrLhCY6Hq/3VW6YZ6dVjOKa1Wfhvg5fGCMG048SHarIz7zxcDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-28T11:07:45.781238Z"},"content_sha256":"6f580b526b8acb2c5c90da979b895a892384a7c5351f85c3e063ff32145cb9ad","schema_version":"1.0","event_id":"sha256:6f580b526b8acb2c5c90da979b895a892384a7c5351f85c3e063ff32145cb9ad"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NCKQ6JGGSHWOOB3LVDXAMYJXB4/bundle.json","state_url":"https://pith.science/pith/NCKQ6JGGSHWOOB3LVDXAMYJXB4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NCKQ6JGGSHWOOB3LVDXAMYJXB4/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-28T11:07:45Z","links":{"resolver":"https://pith.science/pith/NCKQ6JGGSHWOOB3LVDXAMYJXB4","bundle":"https://pith.science/pith/NCKQ6JGGSHWOOB3LVDXAMYJXB4/bundle.json","state":"https://pith.science/pith/NCKQ6JGGSHWOOB3LVDXAMYJXB4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NCKQ6JGGSHWOOB3LVDXAMYJXB4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2000:NCKQ6JGGSHWOOB3LVDXAMYJXB4","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":"c99ac072baaae058b242ccdb077750f0bcdc2b41bd6ca4221573e319f53abef2","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"2000-02-24T22:54:52Z","title_canon_sha256":"c59b456a13c2053b1181840fb5c636b1fecf6636c0467408a9a9c444586e783d"},"schema_version":"1.0","source":{"id":"quant-ph/0002071","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"quant-ph/0002071","created_at":"2026-05-18T03:31:07Z"},{"alias_kind":"arxiv_version","alias_value":"quant-ph/0002071v2","created_at":"2026-05-18T03:31:07Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.quant-ph/0002071","created_at":"2026-05-18T03:31:07Z"},{"alias_kind":"pith_short_12","alias_value":"NCKQ6JGGSHWO","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_16","alias_value":"NCKQ6JGGSHWOOB3L","created_at":"2026-05-18T12:25:50Z"},{"alias_kind":"pith_short_8","alias_value":"NCKQ6JGG","created_at":"2026-05-18T12:25:50Z"}],"graph_snapshots":[{"event_id":"sha256:6f580b526b8acb2c5c90da979b895a892384a7c5351f85c3e063ff32145cb9ad","target":"graph","created_at":"2026-05-18T03:31:07Z","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 propose a nonextensive generalization (q parametrized) of the von Neumann equation for the density operator. Our model naturally leads to the phenomenon of decoherence, and unitary evolution is recovered in the limit of q -> 1. The resulting evolution yields a nonexponential decay for quantum coherences, fact that might be attributed to nonextensivity. We discuss, as an example, the loss of coherence observed in trapped ions.","authors_text":"A. Vidiella-Barranco, H. Moya-Cessa (INAOE, Mexico), Pue., Puebla","cross_cats":[],"headline":"","license":"","primary_cat":"quant-ph","submitted_at":"2000-02-24T22:54:52Z","title":"Nonextensive approach to decoherence in quantum mechanics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"quant-ph/0002071","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":"sha256:27a93e8af457da94ef5a12b7a28097014fa2d3a3ba9c5813d3717750fa809577","target":"record","created_at":"2026-05-18T03:31:07Z","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":"c99ac072baaae058b242ccdb077750f0bcdc2b41bd6ca4221573e319f53abef2","cross_cats_sorted":[],"license":"","primary_cat":"quant-ph","submitted_at":"2000-02-24T22:54:52Z","title_canon_sha256":"c59b456a13c2053b1181840fb5c636b1fecf6636c0467408a9a9c444586e783d"},"schema_version":"1.0","source":{"id":"quant-ph/0002071","kind":"arxiv","version":2}},"canonical_sha256":"68950f24c691ece7076ba8ee0661370f0e4f37b85ea2938f1277801d7e4ae648","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"68950f24c691ece7076ba8ee0661370f0e4f37b85ea2938f1277801d7e4ae648","first_computed_at":"2026-05-18T03:31:07.393552Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:31:07.393552Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rfIWv8064SdHAOwTQWc6Fa7/moOORHDfn3bcq/zuY1Ay4IiMzyBBWsZtiApMpTCEET4CT/EPJOz+JWBw4Ch1DA==","signature_status":"signed_v1","signed_at":"2026-05-18T03:31:07.393953Z","signed_message":"canonical_sha256_bytes"},"source_id":"quant-ph/0002071","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:27a93e8af457da94ef5a12b7a28097014fa2d3a3ba9c5813d3717750fa809577","sha256:6f580b526b8acb2c5c90da979b895a892384a7c5351f85c3e063ff32145cb9ad"],"state_sha256":"5c0f280d49915d200dea5da6503c78968ff2e8b5fe6c03183496d579498a6e1d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"U2FOTisKWKJDCYvQqIXijGitQk4MP3oyVruGEs49beEhBxT1bC91y8MdD6d61/L8IlpiHz0avflZ2XWfGMqHDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-28T11:07:45.783303Z","bundle_sha256":"8a6dd32e3175a21c597b5199353fb2bd32bbd65e6eceb68422714bcee1adfdcc"}}