{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2024:BK7MHBS7UZ2XEDM7ROXPOFLOZH","short_pith_number":"pith:BK7MHBS7","canonical_record":{"source":{"id":"2407.05500","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2024-07-07T21:19:59Z","cross_cats_sorted":[],"title_canon_sha256":"6a2ff2016fada52cf94df2af0141786cdee201ab0dee6b3fa71cc4405cae44f5","abstract_canon_sha256":"5ce9c48209b0c3b1ea2d60cbb23c90cd963d3b6b8f71c23b525f718b98f165f7"},"schema_version":"1.0"},"canonical_sha256":"0abec3865fa675720d9f8baef7156ec9ca2bdf1ed03e1aca7c1c70e0533123ed","source":{"kind":"arxiv","id":"2407.05500","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2407.05500","created_at":"2026-07-05T08:41:14Z"},{"alias_kind":"arxiv_version","alias_value":"2407.05500v1","created_at":"2026-07-05T08:41:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.05500","created_at":"2026-07-05T08:41:14Z"},{"alias_kind":"pith_short_12","alias_value":"BK7MHBS7UZ2X","created_at":"2026-07-05T08:41:14Z"},{"alias_kind":"pith_short_16","alias_value":"BK7MHBS7UZ2XEDM7","created_at":"2026-07-05T08:41:14Z"},{"alias_kind":"pith_short_8","alias_value":"BK7MHBS7","created_at":"2026-07-05T08:41:14Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2024:BK7MHBS7UZ2XEDM7ROXPOFLOZH","target":"record","payload":{"canonical_record":{"source":{"id":"2407.05500","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2024-07-07T21:19:59Z","cross_cats_sorted":[],"title_canon_sha256":"6a2ff2016fada52cf94df2af0141786cdee201ab0dee6b3fa71cc4405cae44f5","abstract_canon_sha256":"5ce9c48209b0c3b1ea2d60cbb23c90cd963d3b6b8f71c23b525f718b98f165f7"},"schema_version":"1.0"},"canonical_sha256":"0abec3865fa675720d9f8baef7156ec9ca2bdf1ed03e1aca7c1c70e0533123ed","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:41:14.271614Z","signature_b64":"dOukJRA963fHq3RkmrxJwkfQmCpa/e6/u5iUQV7pMZ2E1nKaDwiwElWZ53DKXxOVfAe3/xkb14vpnM3i1/obDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0abec3865fa675720d9f8baef7156ec9ca2bdf1ed03e1aca7c1c70e0533123ed","last_reissued_at":"2026-07-05T08:41:14.271130Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:41:14.271130Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2407.05500","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":"2026-07-05T08:41:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"2Ks4wospcrbJUcEWjmUKRJjMKzjoXvJpBf/rv7/8u0ZwTNbRQ+6g0F6HE5A3iN11kKmA/EzPrs8sEFl3cvZBBw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T07:58:49.398699Z"},"content_sha256":"604db9b4a2fde57ff7065af044a11afa4c86dc3cc25083f30b31c6c4af9367c3","schema_version":"1.0","event_id":"sha256:604db9b4a2fde57ff7065af044a11afa4c86dc3cc25083f30b31c6c4af9367c3"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2024:BK7MHBS7UZ2XEDM7ROXPOFLOZH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Revisiting light propagation over (loop) quantum Universe","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"gr-qc","authors_text":"Aliasghar Parvizi, Tomasz Paw{\\l}owski","submitted_at":"2024-07-07T21:19:59Z","abstract_excerpt":"One of the principal aspects through which the effects of quantum gravity are hoped to manifest is the possible modification of the dispersion relation for electromagnetic (e-m) waves. By combining (i) the symmetry reduced approaches to spacetime quantization, including loop quantum cosmology or geometrodynamics framework, and (ii) the (extension of the) Born-Oppenheimer approximation of interacting fields, one can build a reliable though still quasi-phenomenological model for a description of propagation of the e-m radiation over a cosmological spacetime. The past works employing such approac"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.05500","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/2407.05500/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":"2026-07-05T08:41:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/IEeT62t36gkNwGG+carZYCOxCYauX0Ms4jLiRdy/jdlrFWdG7ieR425iZfdDQ7Azx+6/kmuWVWmCGPgd5iSDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T07:58:49.399174Z"},"content_sha256":"d6f7956dda1c0ee6a28586cac2ec092f47330afcfbebaf304a63bb836ba76414","schema_version":"1.0","event_id":"sha256:d6f7956dda1c0ee6a28586cac2ec092f47330afcfbebaf304a63bb836ba76414"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BK7MHBS7UZ2XEDM7ROXPOFLOZH/bundle.json","state_url":"https://pith.science/pith/BK7MHBS7UZ2XEDM7ROXPOFLOZH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BK7MHBS7UZ2XEDM7ROXPOFLOZH/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":"2026-08-04T07:58:49Z","links":{"resolver":"https://pith.science/pith/BK7MHBS7UZ2XEDM7ROXPOFLOZH","bundle":"https://pith.science/pith/BK7MHBS7UZ2XEDM7ROXPOFLOZH/bundle.json","state":"https://pith.science/pith/BK7MHBS7UZ2XEDM7ROXPOFLOZH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BK7MHBS7UZ2XEDM7ROXPOFLOZH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2024:BK7MHBS7UZ2XEDM7ROXPOFLOZH","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":"5ce9c48209b0c3b1ea2d60cbb23c90cd963d3b6b8f71c23b525f718b98f165f7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2024-07-07T21:19:59Z","title_canon_sha256":"6a2ff2016fada52cf94df2af0141786cdee201ab0dee6b3fa71cc4405cae44f5"},"schema_version":"1.0","source":{"id":"2407.05500","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2407.05500","created_at":"2026-07-05T08:41:14Z"},{"alias_kind":"arxiv_version","alias_value":"2407.05500v1","created_at":"2026-07-05T08:41:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2407.05500","created_at":"2026-07-05T08:41:14Z"},{"alias_kind":"pith_short_12","alias_value":"BK7MHBS7UZ2X","created_at":"2026-07-05T08:41:14Z"},{"alias_kind":"pith_short_16","alias_value":"BK7MHBS7UZ2XEDM7","created_at":"2026-07-05T08:41:14Z"},{"alias_kind":"pith_short_8","alias_value":"BK7MHBS7","created_at":"2026-07-05T08:41:14Z"}],"graph_snapshots":[{"event_id":"sha256:d6f7956dda1c0ee6a28586cac2ec092f47330afcfbebaf304a63bb836ba76414","target":"graph","created_at":"2026-07-05T08:41:14Z","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/2407.05500/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"One of the principal aspects through which the effects of quantum gravity are hoped to manifest is the possible modification of the dispersion relation for electromagnetic (e-m) waves. By combining (i) the symmetry reduced approaches to spacetime quantization, including loop quantum cosmology or geometrodynamics framework, and (ii) the (extension of the) Born-Oppenheimer approximation of interacting fields, one can build a reliable though still quasi-phenomenological model for a description of propagation of the e-m radiation over a cosmological spacetime. The past works employing such approac","authors_text":"Aliasghar Parvizi, Tomasz Paw{\\l}owski","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2024-07-07T21:19:59Z","title":"Revisiting light propagation over (loop) quantum Universe"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2407.05500","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":"sha256:604db9b4a2fde57ff7065af044a11afa4c86dc3cc25083f30b31c6c4af9367c3","target":"record","created_at":"2026-07-05T08:41:14Z","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":"5ce9c48209b0c3b1ea2d60cbb23c90cd963d3b6b8f71c23b525f718b98f165f7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2024-07-07T21:19:59Z","title_canon_sha256":"6a2ff2016fada52cf94df2af0141786cdee201ab0dee6b3fa71cc4405cae44f5"},"schema_version":"1.0","source":{"id":"2407.05500","kind":"arxiv","version":1}},"canonical_sha256":"0abec3865fa675720d9f8baef7156ec9ca2bdf1ed03e1aca7c1c70e0533123ed","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0abec3865fa675720d9f8baef7156ec9ca2bdf1ed03e1aca7c1c70e0533123ed","first_computed_at":"2026-07-05T08:41:14.271130Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:41:14.271130Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"dOukJRA963fHq3RkmrxJwkfQmCpa/e6/u5iUQV7pMZ2E1nKaDwiwElWZ53DKXxOVfAe3/xkb14vpnM3i1/obDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T08:41:14.271614Z","signed_message":"canonical_sha256_bytes"},"source_id":"2407.05500","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:604db9b4a2fde57ff7065af044a11afa4c86dc3cc25083f30b31c6c4af9367c3","sha256:d6f7956dda1c0ee6a28586cac2ec092f47330afcfbebaf304a63bb836ba76414"],"state_sha256":"ff2493b5f53791939dbc009c46c37b8166bb26970105123f3c50e07febc1d580"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"x1tB1F4g8zgvuACKKE0Q2dorJzOZ3FVkNecqV14kBABvenErhfbVTJSdb+sS7JafC2UTXbV4+Ascb8kbzsCIAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T07:58:49.403300Z","bundle_sha256":"a747f8ee63697415c16e1b744e8bbcfc8facbcc6a08e9e5ea89bb4ff8a7c4859"}}