{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:NEBDPJ5ACQQNYYSPJWIOLKQVNS","short_pith_number":"pith:NEBDPJ5A","canonical_record":{"source":{"id":"1802.08794","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2018-02-24T04:04:54Z","cross_cats_sorted":["gr-qc","quant-ph"],"title_canon_sha256":"b1a78546e86b44f9897740351553e95fecc06bc5953902106dfc198bf5fb0db1","abstract_canon_sha256":"270763d551b3841831780e169fa3c1e1f9172b48da6731d1fbf407929cd9d9b7"},"schema_version":"1.0"},"canonical_sha256":"690237a7a01420dc624f4d90e5aa156ca1c299a74716f5e1552f8f3070aaf22a","source":{"kind":"arxiv","id":"1802.08794","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.08794","created_at":"2026-05-18T00:16:25Z"},{"alias_kind":"arxiv_version","alias_value":"1802.08794v1","created_at":"2026-05-18T00:16:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.08794","created_at":"2026-05-18T00:16:25Z"},{"alias_kind":"pith_short_12","alias_value":"NEBDPJ5ACQQN","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"NEBDPJ5ACQQNYYSP","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"NEBDPJ5A","created_at":"2026-05-18T12:32:40Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:NEBDPJ5ACQQNYYSPJWIOLKQVNS","target":"record","payload":{"canonical_record":{"source":{"id":"1802.08794","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2018-02-24T04:04:54Z","cross_cats_sorted":["gr-qc","quant-ph"],"title_canon_sha256":"b1a78546e86b44f9897740351553e95fecc06bc5953902106dfc198bf5fb0db1","abstract_canon_sha256":"270763d551b3841831780e169fa3c1e1f9172b48da6731d1fbf407929cd9d9b7"},"schema_version":"1.0"},"canonical_sha256":"690237a7a01420dc624f4d90e5aa156ca1c299a74716f5e1552f8f3070aaf22a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:16:25.588486Z","signature_b64":"8brKeaA1D4qDt4Ktsg3bZGRo6C7xEAwlEEdxTpfmzHLRY4pvAkIqxJMKjRf9gwhK7PlqXypGnEJ5jpgkoFhLBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"690237a7a01420dc624f4d90e5aa156ca1c299a74716f5e1552f8f3070aaf22a","last_reissued_at":"2026-05-18T00:16:25.587975Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:16:25.587975Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1802.08794","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":"2026-05-18T00:16:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oeFx++ypqQ2uE3IbH88SXQfZTlz4wP7Nxvntp8dZXKPidwYQRW6oadg6YLGz0WeWDnPrUqiXhbk5THvHKAD7DQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T08:57:31.877989Z"},"content_sha256":"afc528895966af7e3abb3ae80ba555e96bc18e9cce3aedd96ed0aff0a00bc663","schema_version":"1.0","event_id":"sha256:afc528895966af7e3abb3ae80ba555e96bc18e9cce3aedd96ed0aff0a00bc663"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:NEBDPJ5ACQQNYYSPJWIOLKQVNS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum entanglement in de Sitter space with a wall, and the decoherence of bubble universes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","quant-ph"],"primary_cat":"hep-th","authors_text":"Andreas Albrecht, Misao Sasaki, Sugumi Kanno","submitted_at":"2018-02-24T04:04:54Z","abstract_excerpt":"We study the effect of a bubble wall on the entanglement entropy of a free massive scalar field between two causally disconnected open charts in de Sitter space. We assume there is a delta-functional wall between the open charts. This can be thought of as a model of pair creation of bubble universes in de Sitter space. We first derive the Euclidean vacuum mode functions of the scalar field in the presence of the wall in the coordinates that respect the open charts. We then derive the Bogoliubov transformation between the Euclidean vacuum and the open chart vacua that makes the reduced density "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.08794","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":"2026-05-18T00:16:25Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ex7tRkFNf40gF7/vmedsINC2+0LIuoS1Ib1FNk9rZzfDniOpK1OUfCZ1/bpelW8EmVw7OU83FhVAEE1xsEhVCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-25T08:57:31.878640Z"},"content_sha256":"4f27fcfcce383b6ba291cc69dd6c62ff3e0969ee9b8d6b5d5a92cdd1173a8faf","schema_version":"1.0","event_id":"sha256:4f27fcfcce383b6ba291cc69dd6c62ff3e0969ee9b8d6b5d5a92cdd1173a8faf"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/NEBDPJ5ACQQNYYSPJWIOLKQVNS/bundle.json","state_url":"https://pith.science/pith/NEBDPJ5ACQQNYYSPJWIOLKQVNS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/NEBDPJ5ACQQNYYSPJWIOLKQVNS/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":"2026-05-25T08:57:31Z","links":{"resolver":"https://pith.science/pith/NEBDPJ5ACQQNYYSPJWIOLKQVNS","bundle":"https://pith.science/pith/NEBDPJ5ACQQNYYSPJWIOLKQVNS/bundle.json","state":"https://pith.science/pith/NEBDPJ5ACQQNYYSPJWIOLKQVNS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/NEBDPJ5ACQQNYYSPJWIOLKQVNS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:NEBDPJ5ACQQNYYSPJWIOLKQVNS","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":"270763d551b3841831780e169fa3c1e1f9172b48da6731d1fbf407929cd9d9b7","cross_cats_sorted":["gr-qc","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2018-02-24T04:04:54Z","title_canon_sha256":"b1a78546e86b44f9897740351553e95fecc06bc5953902106dfc198bf5fb0db1"},"schema_version":"1.0","source":{"id":"1802.08794","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.08794","created_at":"2026-05-18T00:16:25Z"},{"alias_kind":"arxiv_version","alias_value":"1802.08794v1","created_at":"2026-05-18T00:16:25Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.08794","created_at":"2026-05-18T00:16:25Z"},{"alias_kind":"pith_short_12","alias_value":"NEBDPJ5ACQQN","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"NEBDPJ5ACQQNYYSP","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"NEBDPJ5A","created_at":"2026-05-18T12:32:40Z"}],"graph_snapshots":[{"event_id":"sha256:4f27fcfcce383b6ba291cc69dd6c62ff3e0969ee9b8d6b5d5a92cdd1173a8faf","target":"graph","created_at":"2026-05-18T00:16:25Z","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 study the effect of a bubble wall on the entanglement entropy of a free massive scalar field between two causally disconnected open charts in de Sitter space. We assume there is a delta-functional wall between the open charts. This can be thought of as a model of pair creation of bubble universes in de Sitter space. We first derive the Euclidean vacuum mode functions of the scalar field in the presence of the wall in the coordinates that respect the open charts. We then derive the Bogoliubov transformation between the Euclidean vacuum and the open chart vacua that makes the reduced density ","authors_text":"Andreas Albrecht, Misao Sasaki, Sugumi Kanno","cross_cats":["gr-qc","quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2018-02-24T04:04:54Z","title":"Quantum entanglement in de Sitter space with a wall, and the decoherence of bubble universes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.08794","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:afc528895966af7e3abb3ae80ba555e96bc18e9cce3aedd96ed0aff0a00bc663","target":"record","created_at":"2026-05-18T00:16:25Z","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":"270763d551b3841831780e169fa3c1e1f9172b48da6731d1fbf407929cd9d9b7","cross_cats_sorted":["gr-qc","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"hep-th","submitted_at":"2018-02-24T04:04:54Z","title_canon_sha256":"b1a78546e86b44f9897740351553e95fecc06bc5953902106dfc198bf5fb0db1"},"schema_version":"1.0","source":{"id":"1802.08794","kind":"arxiv","version":1}},"canonical_sha256":"690237a7a01420dc624f4d90e5aa156ca1c299a74716f5e1552f8f3070aaf22a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"690237a7a01420dc624f4d90e5aa156ca1c299a74716f5e1552f8f3070aaf22a","first_computed_at":"2026-05-18T00:16:25.587975Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:16:25.587975Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"8brKeaA1D4qDt4Ktsg3bZGRo6C7xEAwlEEdxTpfmzHLRY4pvAkIqxJMKjRf9gwhK7PlqXypGnEJ5jpgkoFhLBQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:16:25.588486Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.08794","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:afc528895966af7e3abb3ae80ba555e96bc18e9cce3aedd96ed0aff0a00bc663","sha256:4f27fcfcce383b6ba291cc69dd6c62ff3e0969ee9b8d6b5d5a92cdd1173a8faf"],"state_sha256":"219f0b2812a93ece720f03bd7c38ca20a7c14e1673de79db95adcb8f5d72c773"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oQrVhH/tELTHCOXaFYgkTpb7vSj4LmXobeDsgVqFjxdZHeWHCRHY9Ea/w3a6/vH8UzXJxAnjuE8fctyzQ/ENDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-25T08:57:31.881991Z","bundle_sha256":"a16c437fc67b2fe407a78a676c5a161c8708daf0107dbcb8c1d4326306ed5e11"}}