{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:1998:EE7RB6MP6Z5O4YOI2VWBDA473P","short_pith_number":"pith:EE7RB6MP","canonical_record":{"source":{"id":"hep-th/9801138","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-th","submitted_at":"1998-01-20T13:18:21Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"992c7dfa6616b46cf9cf0123e7014324652cfdcbd7676452046aeb0143bbd4b9","abstract_canon_sha256":"e432f13f34a5bf553345be9940200ebbec5af637b18bd73af997eb02a89a4d47"},"schema_version":"1.0"},"canonical_sha256":"213f10f98ff67aee61c8d56c11839fdbd348362cbd38c7d7ad3ea96bcfbc2a08","source":{"kind":"arxiv","id":"hep-th/9801138","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-th/9801138","created_at":"2026-05-18T02:36:01Z"},{"alias_kind":"arxiv_version","alias_value":"hep-th/9801138v1","created_at":"2026-05-18T02:36:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-th/9801138","created_at":"2026-05-18T02:36:01Z"},{"alias_kind":"pith_short_12","alias_value":"EE7RB6MP6Z5O","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"EE7RB6MP6Z5O4YOI","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"EE7RB6MP","created_at":"2026-05-18T12:25:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:1998:EE7RB6MP6Z5O4YOI2VWBDA473P","target":"record","payload":{"canonical_record":{"source":{"id":"hep-th/9801138","kind":"arxiv","version":1},"metadata":{"license":"","primary_cat":"hep-th","submitted_at":"1998-01-20T13:18:21Z","cross_cats_sorted":["gr-qc"],"title_canon_sha256":"992c7dfa6616b46cf9cf0123e7014324652cfdcbd7676452046aeb0143bbd4b9","abstract_canon_sha256":"e432f13f34a5bf553345be9940200ebbec5af637b18bd73af997eb02a89a4d47"},"schema_version":"1.0"},"canonical_sha256":"213f10f98ff67aee61c8d56c11839fdbd348362cbd38c7d7ad3ea96bcfbc2a08","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:36:01.832408Z","signature_b64":"e8z4FNnr4c6SFXPnRB0uknLNa8zzLPmfc7/6nVFL/qGiAU29Q3Dtuno8cAThKQIKu25njIHQHbntGkS1MvETCg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"213f10f98ff67aee61c8d56c11839fdbd348362cbd38c7d7ad3ea96bcfbc2a08","last_reissued_at":"2026-05-18T02:36:01.831529Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:36:01.831529Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"hep-th/9801138","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":"2026-05-18T02:36:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"sJV4PR9Rt50MyL/ZMW8rQe6A/oBSc1s2On1ih2OQaJFcnBFrzw2+fMNk8HYjWejR35+o2N9KyGdRU9zVYkCbAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T03:07:00.635110Z"},"content_sha256":"566703f92ca87e5f43f221f1a110ac94ffb3d3272b6ba63d4b4e0ab00e578366","schema_version":"1.0","event_id":"sha256:566703f92ca87e5f43f221f1a110ac94ffb3d3272b6ba63d4b4e0ab00e578366"},{"event_type":"graph_snapshot","subject_pith_number":"pith:1998:EE7RB6MP6Z5O4YOI2VWBDA473P","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Event horizon - Magnifying glass for Planck length physics","license":"","headline":"","cross_cats":["gr-qc"],"primary_cat":"hep-th","authors_text":"T. Padmanabhan","submitted_at":"1998-01-20T13:18:21Z","abstract_excerpt":"An attempt is made to describe the `thermodynamics' of semiclassical spacetime without specifying the detailed `molecular structure' of the quantum spacetime, using the known properties of blackholes. I give detailed arguments, essentially based on the behaviour of quantum systems near the event horizon, which suggest that event horizon acts as a magnifying glass to probe Planck length physics even in those contexts in which the spacetime curvature is arbitrarily low. The quantum state describing a blackhole, in any microscopic description of spacetime, has to possess certain universal form of"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-th/9801138","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":"2026-05-18T02:36:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YtV9U95E15u87IHvKt508vwNtYADsBMD1weqm8TiQfv0jOoFwjfLdt7qE+qHjawOKRvaVcphcNqo3GKVrTW0Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T03:07:00.635566Z"},"content_sha256":"59d49f53f05cb139457d859cd39b5ff43ddd0a544153f910820d8ce349e54e4c","schema_version":"1.0","event_id":"sha256:59d49f53f05cb139457d859cd39b5ff43ddd0a544153f910820d8ce349e54e4c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EE7RB6MP6Z5O4YOI2VWBDA473P/bundle.json","state_url":"https://pith.science/pith/EE7RB6MP6Z5O4YOI2VWBDA473P/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EE7RB6MP6Z5O4YOI2VWBDA473P/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":"2026-08-21T03:07:00Z","links":{"resolver":"https://pith.science/pith/EE7RB6MP6Z5O4YOI2VWBDA473P","bundle":"https://pith.science/pith/EE7RB6MP6Z5O4YOI2VWBDA473P/bundle.json","state":"https://pith.science/pith/EE7RB6MP6Z5O4YOI2VWBDA473P/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EE7RB6MP6Z5O4YOI2VWBDA473P/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:1998:EE7RB6MP6Z5O4YOI2VWBDA473P","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":"e432f13f34a5bf553345be9940200ebbec5af637b18bd73af997eb02a89a4d47","cross_cats_sorted":["gr-qc"],"license":"","primary_cat":"hep-th","submitted_at":"1998-01-20T13:18:21Z","title_canon_sha256":"992c7dfa6616b46cf9cf0123e7014324652cfdcbd7676452046aeb0143bbd4b9"},"schema_version":"1.0","source":{"id":"hep-th/9801138","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"hep-th/9801138","created_at":"2026-05-18T02:36:01Z"},{"alias_kind":"arxiv_version","alias_value":"hep-th/9801138v1","created_at":"2026-05-18T02:36:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.hep-th/9801138","created_at":"2026-05-18T02:36:01Z"},{"alias_kind":"pith_short_12","alias_value":"EE7RB6MP6Z5O","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_16","alias_value":"EE7RB6MP6Z5O4YOI","created_at":"2026-05-18T12:25:49Z"},{"alias_kind":"pith_short_8","alias_value":"EE7RB6MP","created_at":"2026-05-18T12:25:49Z"}],"graph_snapshots":[{"event_id":"sha256:59d49f53f05cb139457d859cd39b5ff43ddd0a544153f910820d8ce349e54e4c","target":"graph","created_at":"2026-05-18T02:36:01Z","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":"An attempt is made to describe the `thermodynamics' of semiclassical spacetime without specifying the detailed `molecular structure' of the quantum spacetime, using the known properties of blackholes. I give detailed arguments, essentially based on the behaviour of quantum systems near the event horizon, which suggest that event horizon acts as a magnifying glass to probe Planck length physics even in those contexts in which the spacetime curvature is arbitrarily low. The quantum state describing a blackhole, in any microscopic description of spacetime, has to possess certain universal form of","authors_text":"T. Padmanabhan","cross_cats":["gr-qc"],"headline":"","license":"","primary_cat":"hep-th","submitted_at":"1998-01-20T13:18:21Z","title":"Event horizon - Magnifying glass for Planck length physics"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-th/9801138","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":"sha256:566703f92ca87e5f43f221f1a110ac94ffb3d3272b6ba63d4b4e0ab00e578366","target":"record","created_at":"2026-05-18T02:36:01Z","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":"e432f13f34a5bf553345be9940200ebbec5af637b18bd73af997eb02a89a4d47","cross_cats_sorted":["gr-qc"],"license":"","primary_cat":"hep-th","submitted_at":"1998-01-20T13:18:21Z","title_canon_sha256":"992c7dfa6616b46cf9cf0123e7014324652cfdcbd7676452046aeb0143bbd4b9"},"schema_version":"1.0","source":{"id":"hep-th/9801138","kind":"arxiv","version":1}},"canonical_sha256":"213f10f98ff67aee61c8d56c11839fdbd348362cbd38c7d7ad3ea96bcfbc2a08","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"213f10f98ff67aee61c8d56c11839fdbd348362cbd38c7d7ad3ea96bcfbc2a08","first_computed_at":"2026-05-18T02:36:01.831529Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:36:01.831529Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"e8z4FNnr4c6SFXPnRB0uknLNa8zzLPmfc7/6nVFL/qGiAU29Q3Dtuno8cAThKQIKu25njIHQHbntGkS1MvETCg==","signature_status":"signed_v1","signed_at":"2026-05-18T02:36:01.832408Z","signed_message":"canonical_sha256_bytes"},"source_id":"hep-th/9801138","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:566703f92ca87e5f43f221f1a110ac94ffb3d3272b6ba63d4b4e0ab00e578366","sha256:59d49f53f05cb139457d859cd39b5ff43ddd0a544153f910820d8ce349e54e4c"],"state_sha256":"6a87b71ecd31ee55bf397c8b1f4baec32c20684a4dbaa033d25a416d64134ade"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"mBHBSxBVZah4JQIEamW7QcHNSjCfB7lV/KauFXGEQTfKWah7qZHvUtWCMuEtIsne2/HsRIQY8DEJfRWpG2GSAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T03:07:00.640017Z","bundle_sha256":"14e683c307ba6122f85ae27c55960f84ed2b7e1207939c18fd504a59606a66e9"}}