{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:LVPJ47O4T4M7TAHYXJMGDCC2ZX","short_pith_number":"pith:LVPJ47O4","canonical_record":{"source":{"id":"1803.00665","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-03-02T00:04:53Z","cross_cats_sorted":["cond-mat.quant-gas","cond-mat.stat-mech"],"title_canon_sha256":"61c01ba88245baf1aa8d3395644be30e90989e8511d544e280d5c980f2c84fb4","abstract_canon_sha256":"f946f99274f1ab33f7ad9def302c1feff7f756d7fc994a5b9f531f409bcce7a8"},"schema_version":"1.0"},"canonical_sha256":"5d5e9e7ddc9f19f980f8ba5861885acddf6f004b8035a5c5deb200cfd172a93d","source":{"kind":"arxiv","id":"1803.00665","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.00665","created_at":"2026-05-17T23:56:15Z"},{"alias_kind":"arxiv_version","alias_value":"1803.00665v2","created_at":"2026-05-17T23:56:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.00665","created_at":"2026-05-17T23:56:15Z"},{"alias_kind":"pith_short_12","alias_value":"LVPJ47O4T4M7","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"LVPJ47O4T4M7TAHY","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"LVPJ47O4","created_at":"2026-05-18T12:32:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:LVPJ47O4T4M7TAHYXJMGDCC2ZX","target":"record","payload":{"canonical_record":{"source":{"id":"1803.00665","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-03-02T00:04:53Z","cross_cats_sorted":["cond-mat.quant-gas","cond-mat.stat-mech"],"title_canon_sha256":"61c01ba88245baf1aa8d3395644be30e90989e8511d544e280d5c980f2c84fb4","abstract_canon_sha256":"f946f99274f1ab33f7ad9def302c1feff7f756d7fc994a5b9f531f409bcce7a8"},"schema_version":"1.0"},"canonical_sha256":"5d5e9e7ddc9f19f980f8ba5861885acddf6f004b8035a5c5deb200cfd172a93d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:56:15.331113Z","signature_b64":"jbxoQLnvYoDVQe+3HaOcBnv46qdvbArlQAe4ewCOK4MJJRcuIa26KeuRvx/vXW5UXZthCQT5O9qX7vTvMkw8Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5d5e9e7ddc9f19f980f8ba5861885acddf6f004b8035a5c5deb200cfd172a93d","last_reissued_at":"2026-05-17T23:56:15.330401Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:56:15.330401Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.00665","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":"2026-05-17T23:56:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YzsXfKV+T9VIx5xil7GIXxpmglXTjpA0l8Qg0zeJugDEzxggFSfFfzniUB5nmZxO9emECI72By5cOXLLrPm4Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T05:25:57.264834Z"},"content_sha256":"3ce5cc236f5ce9f739c3cba4dfca3a87fbc08026cdcaa314b46cd38257f68c2a","schema_version":"1.0","event_id":"sha256:3ce5cc236f5ce9f739c3cba4dfca3a87fbc08026cdcaa314b46cd38257f68c2a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:LVPJ47O4T4M7TAHYXJMGDCC2ZX","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum coarse-grained entropy and thermalization in closed systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.quant-gas","cond-mat.stat-mech"],"primary_cat":"quant-ph","authors_text":"Anthony Aguirre, Dominik \\v{S}afr\\'anek, J. M. Deutsch","submitted_at":"2018-03-02T00:04:53Z","abstract_excerpt":"We investigate the detailed properties of Observational entropy, introduced by \\v{S}afr\\'{a}nek et al. [Phys. Rev. A 99, 010101 (2019)] as a generalization of Boltzmann entropy to quantum mechanics. This quantity can involve multiple coarse-grainings, even those that do not commute with each other, without losing any of its properties. It is well-defined out of equilibrium, and for some coarse-grainings it generically rises to the correct thermodynamic value even in a genuinely isolated quantum system. The quantity contains several other entropy definitions as special cases, it has interesting"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.00665","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":"2026-05-17T23:56:15Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"z1LbzhjHTTbs2dCAqL8DE3YulvUjVekHSCR+b/LUA0Jd5s2qyohox2bsQK90g+xCwZSn93S4r0JEwuRwsg/+Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T05:25:57.265516Z"},"content_sha256":"f3fbf50d088c986ec785b8aaf793f35dddf02d98fe02cb2f6129482c1cddfb60","schema_version":"1.0","event_id":"sha256:f3fbf50d088c986ec785b8aaf793f35dddf02d98fe02cb2f6129482c1cddfb60"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/LVPJ47O4T4M7TAHYXJMGDCC2ZX/bundle.json","state_url":"https://pith.science/pith/LVPJ47O4T4M7TAHYXJMGDCC2ZX/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/LVPJ47O4T4M7TAHYXJMGDCC2ZX/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":"2026-06-09T05:25:57Z","links":{"resolver":"https://pith.science/pith/LVPJ47O4T4M7TAHYXJMGDCC2ZX","bundle":"https://pith.science/pith/LVPJ47O4T4M7TAHYXJMGDCC2ZX/bundle.json","state":"https://pith.science/pith/LVPJ47O4T4M7TAHYXJMGDCC2ZX/state.json","well_known_bundle":"https://pith.science/.well-known/pith/LVPJ47O4T4M7TAHYXJMGDCC2ZX/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:LVPJ47O4T4M7TAHYXJMGDCC2ZX","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":"f946f99274f1ab33f7ad9def302c1feff7f756d7fc994a5b9f531f409bcce7a8","cross_cats_sorted":["cond-mat.quant-gas","cond-mat.stat-mech"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-03-02T00:04:53Z","title_canon_sha256":"61c01ba88245baf1aa8d3395644be30e90989e8511d544e280d5c980f2c84fb4"},"schema_version":"1.0","source":{"id":"1803.00665","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.00665","created_at":"2026-05-17T23:56:15Z"},{"alias_kind":"arxiv_version","alias_value":"1803.00665v2","created_at":"2026-05-17T23:56:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.00665","created_at":"2026-05-17T23:56:15Z"},{"alias_kind":"pith_short_12","alias_value":"LVPJ47O4T4M7","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_16","alias_value":"LVPJ47O4T4M7TAHY","created_at":"2026-05-18T12:32:37Z"},{"alias_kind":"pith_short_8","alias_value":"LVPJ47O4","created_at":"2026-05-18T12:32:37Z"}],"graph_snapshots":[{"event_id":"sha256:f3fbf50d088c986ec785b8aaf793f35dddf02d98fe02cb2f6129482c1cddfb60","target":"graph","created_at":"2026-05-17T23:56:15Z","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 investigate the detailed properties of Observational entropy, introduced by \\v{S}afr\\'{a}nek et al. [Phys. Rev. A 99, 010101 (2019)] as a generalization of Boltzmann entropy to quantum mechanics. This quantity can involve multiple coarse-grainings, even those that do not commute with each other, without losing any of its properties. It is well-defined out of equilibrium, and for some coarse-grainings it generically rises to the correct thermodynamic value even in a genuinely isolated quantum system. The quantity contains several other entropy definitions as special cases, it has interesting","authors_text":"Anthony Aguirre, Dominik \\v{S}afr\\'anek, J. M. Deutsch","cross_cats":["cond-mat.quant-gas","cond-mat.stat-mech"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-03-02T00:04:53Z","title":"Quantum coarse-grained entropy and thermalization in closed systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.00665","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":"sha256:3ce5cc236f5ce9f739c3cba4dfca3a87fbc08026cdcaa314b46cd38257f68c2a","target":"record","created_at":"2026-05-17T23:56:15Z","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":"f946f99274f1ab33f7ad9def302c1feff7f756d7fc994a5b9f531f409bcce7a8","cross_cats_sorted":["cond-mat.quant-gas","cond-mat.stat-mech"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2018-03-02T00:04:53Z","title_canon_sha256":"61c01ba88245baf1aa8d3395644be30e90989e8511d544e280d5c980f2c84fb4"},"schema_version":"1.0","source":{"id":"1803.00665","kind":"arxiv","version":2}},"canonical_sha256":"5d5e9e7ddc9f19f980f8ba5861885acddf6f004b8035a5c5deb200cfd172a93d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5d5e9e7ddc9f19f980f8ba5861885acddf6f004b8035a5c5deb200cfd172a93d","first_computed_at":"2026-05-17T23:56:15.330401Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:56:15.330401Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"jbxoQLnvYoDVQe+3HaOcBnv46qdvbArlQAe4ewCOK4MJJRcuIa26KeuRvx/vXW5UXZthCQT5O9qX7vTvMkw8Bg==","signature_status":"signed_v1","signed_at":"2026-05-17T23:56:15.331113Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.00665","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3ce5cc236f5ce9f739c3cba4dfca3a87fbc08026cdcaa314b46cd38257f68c2a","sha256:f3fbf50d088c986ec785b8aaf793f35dddf02d98fe02cb2f6129482c1cddfb60"],"state_sha256":"e5bd7d42e5f6cf4dc489e5fb81969755c01e61695c4e8943aaf1bba826c96005"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"e+Rg5KCfKNO6z1DvogYcLgooe0eNe6gX+Kln90SgAgVqPLO2433zgDeJuXM+L/2w8q970G7lqlCmoISnvSivDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T05:25:57.269431Z","bundle_sha256":"86b9fe8316a4c3f8bacd8a6b440d4a57d51a824468946c57edc8406dacce2fdb"}}