{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:K4P4PJVBKNQWCRYRH5EEWM4EQA","short_pith_number":"pith:K4P4PJVB","canonical_record":{"source":{"id":"1911.06059","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-11-14T12:22:16Z","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","hep-th"],"title_canon_sha256":"bbd758dfd923bc964e1b7c1eadd90862477ecad59f5c371a8081b06fd27930a9","abstract_canon_sha256":"959b9b5f9a0d6e7c40c898cfc0709e94646d5e5d8212d901089f30d2be4f1728"},"schema_version":"1.0"},"canonical_sha256":"571fc7a6a153616147113f484b33848036365874c682e36449ad2388d42630d0","source":{"kind":"arxiv","id":"1911.06059","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.06059","created_at":"2026-07-05T00:19:14Z"},{"alias_kind":"arxiv_version","alias_value":"1911.06059v1","created_at":"2026-07-05T00:19:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.06059","created_at":"2026-07-05T00:19:14Z"},{"alias_kind":"pith_short_12","alias_value":"K4P4PJVBKNQW","created_at":"2026-07-05T00:19:14Z"},{"alias_kind":"pith_short_16","alias_value":"K4P4PJVBKNQWCRYR","created_at":"2026-07-05T00:19:14Z"},{"alias_kind":"pith_short_8","alias_value":"K4P4PJVB","created_at":"2026-07-05T00:19:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:K4P4PJVBKNQWCRYRH5EEWM4EQA","target":"record","payload":{"canonical_record":{"source":{"id":"1911.06059","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-11-14T12:22:16Z","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","hep-th"],"title_canon_sha256":"bbd758dfd923bc964e1b7c1eadd90862477ecad59f5c371a8081b06fd27930a9","abstract_canon_sha256":"959b9b5f9a0d6e7c40c898cfc0709e94646d5e5d8212d901089f30d2be4f1728"},"schema_version":"1.0"},"canonical_sha256":"571fc7a6a153616147113f484b33848036365874c682e36449ad2388d42630d0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T00:19:14.994875Z","signature_b64":"9VB5jJaqvN/4m3Ji5z0pYrLMiC2Bj9RxWo9l9i3gLhLUk5/dIv6uaBDSxyK8nXIVl1W5tUnpbSV8KY9DhaqrBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"571fc7a6a153616147113f484b33848036365874c682e36449ad2388d42630d0","last_reissued_at":"2026-07-05T00:19:14.994494Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T00:19:14.994494Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1911.06059","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":"2026-07-05T00:19:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"h3VXCggZu+z4vqKUcegZBAzrvPb+HiB0IW3a6V8Fp47SKEp6Zc6YHTsmRctt7KHUDpfuK6PWfNlcPcvSErCgAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T22:23:00.688104Z"},"content_sha256":"2b86ef36d894bba5d45f1bb9d4fe751097a7ea0a6687f7c7cfe731488906401d","schema_version":"1.0","event_id":"sha256:2b86ef36d894bba5d45f1bb9d4fe751097a7ea0a6687f7c7cfe731488906401d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:K4P4PJVBKNQWCRYRH5EEWM4EQA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Black holes, Planckian granularity, and the changing cosmological `constant'","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO","astro-ph.GA","hep-th"],"primary_cat":"gr-qc","authors_text":"Alejandro Perez, Daniel Sudarsky","submitted_at":"2019-11-14T12:22:16Z","abstract_excerpt":"In a recent work we have argued that nosy energy momentum diffusion due to space-time discreteness at the Planck scale (naturally expected to arise from quantum gravity) can be responsible for the generation of a cosmological constant during the electro-weak phase transition era of the cosmic evolution. Simple dimensional analysis and an effectively Brownian description of the propagation of fundamental particles on a granular background yields a cosmological constant of the order of magnitude of the observed value, without fine tuning. While the energy diffusion is negligible for matter in st"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.06059","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/1911.06059/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T00:19:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"thQ9jUpF7vRRPgKOJUx39pT93581i2pQbn6O3CqA7Tx199CZ1lDrj/57jR+nMQGwwLmt6XYuywobf0KqCXGGCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-19T22:23:00.689095Z"},"content_sha256":"d2f92a8ccb9fac96befc07987eb84da80fbf26ac719c4fabeb59e1c96dd5edce","schema_version":"1.0","event_id":"sha256:d2f92a8ccb9fac96befc07987eb84da80fbf26ac719c4fabeb59e1c96dd5edce"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/K4P4PJVBKNQWCRYRH5EEWM4EQA/bundle.json","state_url":"https://pith.science/pith/K4P4PJVBKNQWCRYRH5EEWM4EQA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/K4P4PJVBKNQWCRYRH5EEWM4EQA/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":"2026-08-19T22:23:00Z","links":{"resolver":"https://pith.science/pith/K4P4PJVBKNQWCRYRH5EEWM4EQA","bundle":"https://pith.science/pith/K4P4PJVBKNQWCRYRH5EEWM4EQA/bundle.json","state":"https://pith.science/pith/K4P4PJVBKNQWCRYRH5EEWM4EQA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/K4P4PJVBKNQWCRYRH5EEWM4EQA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:K4P4PJVBKNQWCRYRH5EEWM4EQA","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":"959b9b5f9a0d6e7c40c898cfc0709e94646d5e5d8212d901089f30d2be4f1728","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-11-14T12:22:16Z","title_canon_sha256":"bbd758dfd923bc964e1b7c1eadd90862477ecad59f5c371a8081b06fd27930a9"},"schema_version":"1.0","source":{"id":"1911.06059","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1911.06059","created_at":"2026-07-05T00:19:14Z"},{"alias_kind":"arxiv_version","alias_value":"1911.06059v1","created_at":"2026-07-05T00:19:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1911.06059","created_at":"2026-07-05T00:19:14Z"},{"alias_kind":"pith_short_12","alias_value":"K4P4PJVBKNQW","created_at":"2026-07-05T00:19:14Z"},{"alias_kind":"pith_short_16","alias_value":"K4P4PJVBKNQWCRYR","created_at":"2026-07-05T00:19:14Z"},{"alias_kind":"pith_short_8","alias_value":"K4P4PJVB","created_at":"2026-07-05T00:19:14Z"}],"graph_snapshots":[{"event_id":"sha256:d2f92a8ccb9fac96befc07987eb84da80fbf26ac719c4fabeb59e1c96dd5edce","target":"graph","created_at":"2026-07-05T00:19:14Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/1911.06059/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In a recent work we have argued that nosy energy momentum diffusion due to space-time discreteness at the Planck scale (naturally expected to arise from quantum gravity) can be responsible for the generation of a cosmological constant during the electro-weak phase transition era of the cosmic evolution. Simple dimensional analysis and an effectively Brownian description of the propagation of fundamental particles on a granular background yields a cosmological constant of the order of magnitude of the observed value, without fine tuning. While the energy diffusion is negligible for matter in st","authors_text":"Alejandro Perez, Daniel Sudarsky","cross_cats":["astro-ph.CO","astro-ph.GA","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-11-14T12:22:16Z","title":"Black holes, Planckian granularity, and the changing cosmological `constant'"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1911.06059","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":"sha256:2b86ef36d894bba5d45f1bb9d4fe751097a7ea0a6687f7c7cfe731488906401d","target":"record","created_at":"2026-07-05T00:19:14Z","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":"959b9b5f9a0d6e7c40c898cfc0709e94646d5e5d8212d901089f30d2be4f1728","cross_cats_sorted":["astro-ph.CO","astro-ph.GA","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2019-11-14T12:22:16Z","title_canon_sha256":"bbd758dfd923bc964e1b7c1eadd90862477ecad59f5c371a8081b06fd27930a9"},"schema_version":"1.0","source":{"id":"1911.06059","kind":"arxiv","version":1}},"canonical_sha256":"571fc7a6a153616147113f484b33848036365874c682e36449ad2388d42630d0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"571fc7a6a153616147113f484b33848036365874c682e36449ad2388d42630d0","first_computed_at":"2026-07-05T00:19:14.994494Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:19:14.994494Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"9VB5jJaqvN/4m3Ji5z0pYrLMiC2Bj9RxWo9l9i3gLhLUk5/dIv6uaBDSxyK8nXIVl1W5tUnpbSV8KY9DhaqrBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T00:19:14.994875Z","signed_message":"canonical_sha256_bytes"},"source_id":"1911.06059","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2b86ef36d894bba5d45f1bb9d4fe751097a7ea0a6687f7c7cfe731488906401d","sha256:d2f92a8ccb9fac96befc07987eb84da80fbf26ac719c4fabeb59e1c96dd5edce"],"state_sha256":"551df21aa00869f2f64ecff73c6bf9ecf6927ff14ac254f642809a63a37c3d6d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"m6xdBop8XOfsc17jh5DgJAcg4uxonF9TMKP9oZ19O58iqJXxawc4wlq4og21w+QLfmfTxPFEEYKe+3vfviEoCg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-19T22:23:00.695575Z","bundle_sha256":"9c13a8d3486796905631d6c6c78f7034983dba3292dd48e1181a884297db72ee"}}