{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:ZMD5FI5K7UOMTIRZB6F3J5B65Y","short_pith_number":"pith:ZMD5FI5K","canonical_record":{"source":{"id":"1401.3501","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2014-01-15T06:33:28Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"5bede46edc465d88e7433375c12be902d7613f5001459ad10ab6d1b4c3eb86c9","abstract_canon_sha256":"78949fe5243291ea9ea87c6c3cc934dc4c1cc6656e4bf4cafdc89b2129bf96bf"},"schema_version":"1.0"},"canonical_sha256":"cb07d2a3aafd1cc9a2390f8bb4f43eee1d91668f4362b582ee5299d9b37b7561","source":{"kind":"arxiv","id":"1401.3501","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1401.3501","created_at":"2026-05-18T02:30:33Z"},{"alias_kind":"arxiv_version","alias_value":"1401.3501v4","created_at":"2026-05-18T02:30:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1401.3501","created_at":"2026-05-18T02:30:33Z"},{"alias_kind":"pith_short_12","alias_value":"ZMD5FI5K7UOM","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_16","alias_value":"ZMD5FI5K7UOMTIRZ","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_8","alias_value":"ZMD5FI5K","created_at":"2026-05-18T12:28:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:ZMD5FI5K7UOMTIRZB6F3J5B65Y","target":"record","payload":{"canonical_record":{"source":{"id":"1401.3501","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2014-01-15T06:33:28Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"5bede46edc465d88e7433375c12be902d7613f5001459ad10ab6d1b4c3eb86c9","abstract_canon_sha256":"78949fe5243291ea9ea87c6c3cc934dc4c1cc6656e4bf4cafdc89b2129bf96bf"},"schema_version":"1.0"},"canonical_sha256":"cb07d2a3aafd1cc9a2390f8bb4f43eee1d91668f4362b582ee5299d9b37b7561","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:30:33.864263Z","signature_b64":"v/wSv9T97tjRGa2zYNIdXKaXS1kCzO9p1EMerF/i80ZuJmY91zE3bb1+m2Yss9yIhoiVjEangO8KAzZ76EMsCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"cb07d2a3aafd1cc9a2390f8bb4f43eee1d91668f4362b582ee5299d9b37b7561","last_reissued_at":"2026-05-18T02:30:33.863880Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:30:33.863880Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1401.3501","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T02:30:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JbVDs2AiX3F1zukj8TN60M5hQovAswlZSJ/bNzQm2zMMQbthzc0KquzuASVFKSeQ1iibnSDj7ftu0bGGxntUDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T02:04:33.898424Z"},"content_sha256":"ce296cb138c44758ebd3718359bf55aa4a28cda0c04f3faff840ceb976a4ca29","schema_version":"1.0","event_id":"sha256:ce296cb138c44758ebd3718359bf55aa4a28cda0c04f3faff840ceb976a4ca29"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:ZMD5FI5K7UOMTIRZB6F3J5B65Y","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Something special at the event horizon","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc"],"primary_cat":"hep-th","authors_text":"Myungseok Eune, Wontae Kim, Yongwan Gim","submitted_at":"2014-01-15T06:33:28Z","abstract_excerpt":"We calculate the free-fall energy density of scalar fields semi-classically by employing the trace anomaly on a two-dimensional Schwarzschild black hole with respect to various black hole states in order to clarify whether something special at the horizon happens or not. For the Boulware state, the energy density at the horizon is always negative divergent, which is independent of initial free-fall positions. However, in the Unruh state the initial free-fall position is responsible for the energy density at the horizon and there is a critical point to determine the sign of the energy density a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.3501","kind":"arxiv","version":4},"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":"2026-05-18T02:30:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XfDp5Z2U8U28TWJpjeqtnokUVQEsyA7SH3Z3Iy4QEWAN+Y4kIMhuUMXXxeRH+wmXSPOEo1QW3gN4x82U9goqCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T02:04:33.899218Z"},"content_sha256":"4302d1b4aecaf07037ed39e8b288aa537614e5a37ed01cfa28e67169def48415","schema_version":"1.0","event_id":"sha256:4302d1b4aecaf07037ed39e8b288aa537614e5a37ed01cfa28e67169def48415"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/ZMD5FI5K7UOMTIRZB6F3J5B65Y/bundle.json","state_url":"https://pith.science/pith/ZMD5FI5K7UOMTIRZB6F3J5B65Y/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/ZMD5FI5K7UOMTIRZB6F3J5B65Y/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":"2026-06-01T02:04:33Z","links":{"resolver":"https://pith.science/pith/ZMD5FI5K7UOMTIRZB6F3J5B65Y","bundle":"https://pith.science/pith/ZMD5FI5K7UOMTIRZB6F3J5B65Y/bundle.json","state":"https://pith.science/pith/ZMD5FI5K7UOMTIRZB6F3J5B65Y/state.json","well_known_bundle":"https://pith.science/.well-known/pith/ZMD5FI5K7UOMTIRZB6F3J5B65Y/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:ZMD5FI5K7UOMTIRZB6F3J5B65Y","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":"78949fe5243291ea9ea87c6c3cc934dc4c1cc6656e4bf4cafdc89b2129bf96bf","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2014-01-15T06:33:28Z","title_canon_sha256":"5bede46edc465d88e7433375c12be902d7613f5001459ad10ab6d1b4c3eb86c9"},"schema_version":"1.0","source":{"id":"1401.3501","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1401.3501","created_at":"2026-05-18T02:30:33Z"},{"alias_kind":"arxiv_version","alias_value":"1401.3501v4","created_at":"2026-05-18T02:30:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1401.3501","created_at":"2026-05-18T02:30:33Z"},{"alias_kind":"pith_short_12","alias_value":"ZMD5FI5K7UOM","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_16","alias_value":"ZMD5FI5K7UOMTIRZ","created_at":"2026-05-18T12:28:59Z"},{"alias_kind":"pith_short_8","alias_value":"ZMD5FI5K","created_at":"2026-05-18T12:28:59Z"}],"graph_snapshots":[{"event_id":"sha256:4302d1b4aecaf07037ed39e8b288aa537614e5a37ed01cfa28e67169def48415","target":"graph","created_at":"2026-05-18T02:30:33Z","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 calculate the free-fall energy density of scalar fields semi-classically by employing the trace anomaly on a two-dimensional Schwarzschild black hole with respect to various black hole states in order to clarify whether something special at the horizon happens or not. For the Boulware state, the energy density at the horizon is always negative divergent, which is independent of initial free-fall positions. However, in the Unruh state the initial free-fall position is responsible for the energy density at the horizon and there is a critical point to determine the sign of the energy density a","authors_text":"Myungseok Eune, Wontae Kim, Yongwan Gim","cross_cats":["gr-qc"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2014-01-15T06:33:28Z","title":"Something special at the event horizon"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1401.3501","kind":"arxiv","version":4},"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:ce296cb138c44758ebd3718359bf55aa4a28cda0c04f3faff840ceb976a4ca29","target":"record","created_at":"2026-05-18T02:30:33Z","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":"78949fe5243291ea9ea87c6c3cc934dc4c1cc6656e4bf4cafdc89b2129bf96bf","cross_cats_sorted":["gr-qc"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2014-01-15T06:33:28Z","title_canon_sha256":"5bede46edc465d88e7433375c12be902d7613f5001459ad10ab6d1b4c3eb86c9"},"schema_version":"1.0","source":{"id":"1401.3501","kind":"arxiv","version":4}},"canonical_sha256":"cb07d2a3aafd1cc9a2390f8bb4f43eee1d91668f4362b582ee5299d9b37b7561","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"cb07d2a3aafd1cc9a2390f8bb4f43eee1d91668f4362b582ee5299d9b37b7561","first_computed_at":"2026-05-18T02:30:33.863880Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:30:33.863880Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"v/wSv9T97tjRGa2zYNIdXKaXS1kCzO9p1EMerF/i80ZuJmY91zE3bb1+m2Yss9yIhoiVjEangO8KAzZ76EMsCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:30:33.864263Z","signed_message":"canonical_sha256_bytes"},"source_id":"1401.3501","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ce296cb138c44758ebd3718359bf55aa4a28cda0c04f3faff840ceb976a4ca29","sha256:4302d1b4aecaf07037ed39e8b288aa537614e5a37ed01cfa28e67169def48415"],"state_sha256":"e8ee61c6836e9dbf8b3d38573a9d01496338adb1681cde7c8c57ad502dab5b02"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oRTLMfo0A/iSHJhkt3ANqPaDPziXekTDrpvZBaM1HE9THtfPcY97MG2C9NgCpL3BGY7JBA2PPgSvhR9D6prVCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T02:04:33.903210Z","bundle_sha256":"cb7491826823651747fbbd1ec522144763a8ff50ae893f82b39d231520a7dbff"}}