{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:RJ5GZPXAFUO5SQGCMAEGBFR2XI","short_pith_number":"pith:RJ5GZPXA","canonical_record":{"source":{"id":"1806.00549","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2018-06-01T21:46:50Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"8a0b9391fdefeeea9c7b22aac548727e9d4c320e58621e0d03246c1e3c9eae3e","abstract_canon_sha256":"7f824b35cc1465e8c921a306c9b3f5f022c2c3966bef846797fdb018ac88c11b"},"schema_version":"1.0"},"canonical_sha256":"8a7a6cbee02d1dd940c2600860963aba1aceeae30570de02958e76b25aeb3be3","source":{"kind":"arxiv","id":"1806.00549","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.00549","created_at":"2026-05-17T23:56:20Z"},{"alias_kind":"arxiv_version","alias_value":"1806.00549v2","created_at":"2026-05-17T23:56:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.00549","created_at":"2026-05-17T23:56:20Z"},{"alias_kind":"pith_short_12","alias_value":"RJ5GZPXAFUO5","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"RJ5GZPXAFUO5SQGC","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"RJ5GZPXA","created_at":"2026-05-18T12:32:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:RJ5GZPXAFUO5SQGCMAEGBFR2XI","target":"record","payload":{"canonical_record":{"source":{"id":"1806.00549","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2018-06-01T21:46:50Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"8a0b9391fdefeeea9c7b22aac548727e9d4c320e58621e0d03246c1e3c9eae3e","abstract_canon_sha256":"7f824b35cc1465e8c921a306c9b3f5f022c2c3966bef846797fdb018ac88c11b"},"schema_version":"1.0"},"canonical_sha256":"8a7a6cbee02d1dd940c2600860963aba1aceeae30570de02958e76b25aeb3be3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:56:20.699294Z","signature_b64":"i9aC3WfnbYMCDzKgQZGush7CXwax3M39TdoP5pdVtSY1RhD3loOqHQ5bsGEvOlWb8/m9x6ctkGxz84AL14JeCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"8a7a6cbee02d1dd940c2600860963aba1aceeae30570de02958e76b25aeb3be3","last_reissued_at":"2026-05-17T23:56:20.698804Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:56:20.698804Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1806.00549","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":"2026-05-17T23:56:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BjOFAGddBa9zrvfSUnYpjRynEZX3olZ1eOSN4F+o/t7/FG7AWTBUlNctzhE0y6V6L0LiXlsdWbYwAehJT7AbDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T16:36:12.827130Z"},"content_sha256":"5fced53919a6f46774ee5a6581028d0150e3e46b1f312b11a19a54421ab58db6","schema_version":"1.0","event_id":"sha256:5fced53919a6f46774ee5a6581028d0150e3e46b1f312b11a19a54421ab58db6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:RJ5GZPXAFUO5SQGCMAEGBFR2XI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Black hole entropy from non-proper gauge degrees of freedom: II. The charged vacuum capacitor","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"hep-th","authors_text":"Glenn Barnich","submitted_at":"2018-06-01T21:46:50Z","abstract_excerpt":"The question which degrees of freedom are responsible for the classical part of the Gibbons-Hawking entropy is addressed. A physical toy model sharing the same properties from the viewpoint of the linearized theory is a charged vacuum capacitor. In Maxwell's theory, the gauge sector including ghosts is a topological field theory. When computing the grand canonical partition function with a chemical potential for electric charge in the indefinite metric Hilbert space of the BRST quantized theory, the classical contribution originates from the part of the gauge sector that is no longer trivial d"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.00549","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":"2026-05-17T23:56:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"znGSapAXLRIQmuDQ9/5Ds7ud7CzSNxdxleNOSZ3TetwqOrGoErCkUeKVySeUAPon+tycnAOEvybXx2yV1I2SBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T16:36:12.827486Z"},"content_sha256":"0861be019c26d07f860c5189ac719329927b5b3b7300f01d0983293051157dc3","schema_version":"1.0","event_id":"sha256:0861be019c26d07f860c5189ac719329927b5b3b7300f01d0983293051157dc3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/RJ5GZPXAFUO5SQGCMAEGBFR2XI/bundle.json","state_url":"https://pith.science/pith/RJ5GZPXAFUO5SQGCMAEGBFR2XI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/RJ5GZPXAFUO5SQGCMAEGBFR2XI/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":"2026-06-09T16:36:12Z","links":{"resolver":"https://pith.science/pith/RJ5GZPXAFUO5SQGCMAEGBFR2XI","bundle":"https://pith.science/pith/RJ5GZPXAFUO5SQGCMAEGBFR2XI/bundle.json","state":"https://pith.science/pith/RJ5GZPXAFUO5SQGCMAEGBFR2XI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/RJ5GZPXAFUO5SQGCMAEGBFR2XI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:RJ5GZPXAFUO5SQGCMAEGBFR2XI","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":"7f824b35cc1465e8c921a306c9b3f5f022c2c3966bef846797fdb018ac88c11b","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2018-06-01T21:46:50Z","title_canon_sha256":"8a0b9391fdefeeea9c7b22aac548727e9d4c320e58621e0d03246c1e3c9eae3e"},"schema_version":"1.0","source":{"id":"1806.00549","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1806.00549","created_at":"2026-05-17T23:56:20Z"},{"alias_kind":"arxiv_version","alias_value":"1806.00549v2","created_at":"2026-05-17T23:56:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.00549","created_at":"2026-05-17T23:56:20Z"},{"alias_kind":"pith_short_12","alias_value":"RJ5GZPXAFUO5","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"RJ5GZPXAFUO5SQGC","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"RJ5GZPXA","created_at":"2026-05-18T12:32:50Z"}],"graph_snapshots":[{"event_id":"sha256:0861be019c26d07f860c5189ac719329927b5b3b7300f01d0983293051157dc3","target":"graph","created_at":"2026-05-17T23:56:20Z","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":"The question which degrees of freedom are responsible for the classical part of the Gibbons-Hawking entropy is addressed. A physical toy model sharing the same properties from the viewpoint of the linearized theory is a charged vacuum capacitor. In Maxwell's theory, the gauge sector including ghosts is a topological field theory. When computing the grand canonical partition function with a chemical potential for electric charge in the indefinite metric Hilbert space of the BRST quantized theory, the classical contribution originates from the part of the gauge sector that is no longer trivial d","authors_text":"Glenn Barnich","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2018-06-01T21:46:50Z","title":"Black hole entropy from non-proper gauge degrees of freedom: II. The charged vacuum capacitor"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.00549","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":"sha256:5fced53919a6f46774ee5a6581028d0150e3e46b1f312b11a19a54421ab58db6","target":"record","created_at":"2026-05-17T23:56:20Z","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":"7f824b35cc1465e8c921a306c9b3f5f022c2c3966bef846797fdb018ac88c11b","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2018-06-01T21:46:50Z","title_canon_sha256":"8a0b9391fdefeeea9c7b22aac548727e9d4c320e58621e0d03246c1e3c9eae3e"},"schema_version":"1.0","source":{"id":"1806.00549","kind":"arxiv","version":2}},"canonical_sha256":"8a7a6cbee02d1dd940c2600860963aba1aceeae30570de02958e76b25aeb3be3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"8a7a6cbee02d1dd940c2600860963aba1aceeae30570de02958e76b25aeb3be3","first_computed_at":"2026-05-17T23:56:20.698804Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:56:20.698804Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"i9aC3WfnbYMCDzKgQZGush7CXwax3M39TdoP5pdVtSY1RhD3loOqHQ5bsGEvOlWb8/m9x6ctkGxz84AL14JeCQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:56:20.699294Z","signed_message":"canonical_sha256_bytes"},"source_id":"1806.00549","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5fced53919a6f46774ee5a6581028d0150e3e46b1f312b11a19a54421ab58db6","sha256:0861be019c26d07f860c5189ac719329927b5b3b7300f01d0983293051157dc3"],"state_sha256":"912e33eb059662df4583c86e539830a2386a14f22d97de75ccbc6bd857bf0b53"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"axCmasaAaLPv14Eilb/n9LcmiNVysMTTxa/tsDu0oIHeMgPRNLf+bjzoRRV07z0C/GXdgFGFPuKUg5+BlicsBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T16:36:12.829457Z","bundle_sha256":"5cf400a0dbbc3e76323ade75046c6479233afc9a0d0aba95e7f0482adbc05a8e"}}