{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:KK576N2YZELZ4MVSPHNNBI6FOF","short_pith_number":"pith:KK576N2Y","canonical_record":{"source":{"id":"0912.4252","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-12-21T20:38:36Z","cross_cats_sorted":[],"title_canon_sha256":"73f192a6a8871dc2c6d7b21911c1191a99ea22dd522135172b49c5c697940b9c","abstract_canon_sha256":"fa285c4659c0d70fb0425cc96dc49f280f4fffe0d96875b692674bfd17dc4756"},"schema_version":"1.0"},"canonical_sha256":"52bbff3758c9179e32b279dad0a3c571655190a4d558cd3b42112d36f9fdeda1","source":{"kind":"arxiv","id":"0912.4252","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0912.4252","created_at":"2026-05-18T02:10:14Z"},{"alias_kind":"arxiv_version","alias_value":"0912.4252v1","created_at":"2026-05-18T02:10:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.4252","created_at":"2026-05-18T02:10:14Z"},{"alias_kind":"pith_short_12","alias_value":"KK576N2YZELZ","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"KK576N2YZELZ4MVS","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"KK576N2Y","created_at":"2026-05-18T12:26:00Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:KK576N2YZELZ4MVSPHNNBI6FOF","target":"record","payload":{"canonical_record":{"source":{"id":"0912.4252","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-12-21T20:38:36Z","cross_cats_sorted":[],"title_canon_sha256":"73f192a6a8871dc2c6d7b21911c1191a99ea22dd522135172b49c5c697940b9c","abstract_canon_sha256":"fa285c4659c0d70fb0425cc96dc49f280f4fffe0d96875b692674bfd17dc4756"},"schema_version":"1.0"},"canonical_sha256":"52bbff3758c9179e32b279dad0a3c571655190a4d558cd3b42112d36f9fdeda1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:10:14.846090Z","signature_b64":"GGMcjtdmh6LLt+1RpRyOsCwxNKjyc1hXsJFj0C3Onij0hNaPwk6x5Ltq4+vlBCLouvDhYxyPAiYHI0Hlh+sNBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"52bbff3758c9179e32b279dad0a3c571655190a4d558cd3b42112d36f9fdeda1","last_reissued_at":"2026-05-18T02:10:14.845491Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:10:14.845491Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0912.4252","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:10:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"te5mO/sEoZ3xY9XpNUJFyo3GQzSviEfdr+gHJp0I+/1M0Rup1JU0jXUA+uMaW1bcbIwAFQu01j/308Q8hCR6BQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T11:04:46.100695Z"},"content_sha256":"e65175e97379e11cd12e6089da1bd4326bd8f70b2c2ddef98b675b310982d35c","schema_version":"1.0","event_id":"sha256:e65175e97379e11cd12e6089da1bd4326bd8f70b2c2ddef98b675b310982d35c"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:KK576N2YZELZ4MVSPHNNBI6FOF","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"A Quantum-Bayesian Route to Quantum-State Space","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Christopher A. Fuchs, Ruediger Schack","submitted_at":"2009-12-21T20:38:36Z","abstract_excerpt":"In the quantum-Bayesian approach to quantum foundations, a quantum state is viewed as an expression of an agent's personalist Bayesian degrees of belief, or probabilities, concerning the results of measurements. These probabilities obey the usual probability rules as required by Dutch-book coherence, but quantum mechanics imposes additional constraints upon them. In this paper, we explore the question of deriving the structure of quantum-state space from a set of assumptions in the spirit of quantum Bayesianism. The starting point is the representation of quantum states induced by a symmetric "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.4252","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:10:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"25fkbepA8Vyb/4BBiIPP5KLRQ9eLIX4IrsRtlGky7C6o7ZBFKifkn+na8Ln+c5YsxlNTxLfWcZwygkzzhhakBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T11:04:46.101487Z"},"content_sha256":"748ae36e80e4d611cb258396b3863f59c6a4016bf91d81a92217d49f45fe6aed","schema_version":"1.0","event_id":"sha256:748ae36e80e4d611cb258396b3863f59c6a4016bf91d81a92217d49f45fe6aed"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KK576N2YZELZ4MVSPHNNBI6FOF/bundle.json","state_url":"https://pith.science/pith/KK576N2YZELZ4MVSPHNNBI6FOF/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KK576N2YZELZ4MVSPHNNBI6FOF/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":"2026-05-31T11:04:46Z","links":{"resolver":"https://pith.science/pith/KK576N2YZELZ4MVSPHNNBI6FOF","bundle":"https://pith.science/pith/KK576N2YZELZ4MVSPHNNBI6FOF/bundle.json","state":"https://pith.science/pith/KK576N2YZELZ4MVSPHNNBI6FOF/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KK576N2YZELZ4MVSPHNNBI6FOF/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:KK576N2YZELZ4MVSPHNNBI6FOF","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":"fa285c4659c0d70fb0425cc96dc49f280f4fffe0d96875b692674bfd17dc4756","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-12-21T20:38:36Z","title_canon_sha256":"73f192a6a8871dc2c6d7b21911c1191a99ea22dd522135172b49c5c697940b9c"},"schema_version":"1.0","source":{"id":"0912.4252","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0912.4252","created_at":"2026-05-18T02:10:14Z"},{"alias_kind":"arxiv_version","alias_value":"0912.4252v1","created_at":"2026-05-18T02:10:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0912.4252","created_at":"2026-05-18T02:10:14Z"},{"alias_kind":"pith_short_12","alias_value":"KK576N2YZELZ","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_16","alias_value":"KK576N2YZELZ4MVS","created_at":"2026-05-18T12:26:00Z"},{"alias_kind":"pith_short_8","alias_value":"KK576N2Y","created_at":"2026-05-18T12:26:00Z"}],"graph_snapshots":[{"event_id":"sha256:748ae36e80e4d611cb258396b3863f59c6a4016bf91d81a92217d49f45fe6aed","target":"graph","created_at":"2026-05-18T02:10:14Z","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":"In the quantum-Bayesian approach to quantum foundations, a quantum state is viewed as an expression of an agent's personalist Bayesian degrees of belief, or probabilities, concerning the results of measurements. These probabilities obey the usual probability rules as required by Dutch-book coherence, but quantum mechanics imposes additional constraints upon them. In this paper, we explore the question of deriving the structure of quantum-state space from a set of assumptions in the spirit of quantum Bayesianism. The starting point is the representation of quantum states induced by a symmetric ","authors_text":"Christopher A. Fuchs, Ruediger Schack","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-12-21T20:38:36Z","title":"A Quantum-Bayesian Route to Quantum-State Space"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0912.4252","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:e65175e97379e11cd12e6089da1bd4326bd8f70b2c2ddef98b675b310982d35c","target":"record","created_at":"2026-05-18T02:10:14Z","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":"fa285c4659c0d70fb0425cc96dc49f280f4fffe0d96875b692674bfd17dc4756","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-12-21T20:38:36Z","title_canon_sha256":"73f192a6a8871dc2c6d7b21911c1191a99ea22dd522135172b49c5c697940b9c"},"schema_version":"1.0","source":{"id":"0912.4252","kind":"arxiv","version":1}},"canonical_sha256":"52bbff3758c9179e32b279dad0a3c571655190a4d558cd3b42112d36f9fdeda1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"52bbff3758c9179e32b279dad0a3c571655190a4d558cd3b42112d36f9fdeda1","first_computed_at":"2026-05-18T02:10:14.845491Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:10:14.845491Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"GGMcjtdmh6LLt+1RpRyOsCwxNKjyc1hXsJFj0C3Onij0hNaPwk6x5Ltq4+vlBCLouvDhYxyPAiYHI0Hlh+sNBg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:10:14.846090Z","signed_message":"canonical_sha256_bytes"},"source_id":"0912.4252","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e65175e97379e11cd12e6089da1bd4326bd8f70b2c2ddef98b675b310982d35c","sha256:748ae36e80e4d611cb258396b3863f59c6a4016bf91d81a92217d49f45fe6aed"],"state_sha256":"0cef5f52d75290a43f2cc9a736c11f1513ec0b908f76b32a70343fdc6501e7ec"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JVCrM5HNV5nfuXXo0JpmAsvRECnI0L3Os5UFOniYXVgT3BILRm36FPbgdJ2+S2H9oDa4H8bWWUWPHPcPay7FBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T11:04:46.105472Z","bundle_sha256":"88ddc2c333ffe966911f9c090b6d1d7944f751e5ddfe4240ef898a731c7b0631"}}