{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:7KB265LOGVBA65T7572JKTZV46","short_pith_number":"pith:7KB265LO","canonical_record":{"source":{"id":"1606.03005","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-06-09T15:47:12Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"52162e26cf4aa3fd581455e66744a5a4302008e89065658a949515e16c4a8695","abstract_canon_sha256":"7631c520c793b272b93150dec90f5bc69439b6693d0435d5ebab7fee557d66ae"},"schema_version":"1.0"},"canonical_sha256":"fa83af756e35420f767feff4954f35e7a1d16de1b12b9d2ca91d663f77bfe04e","source":{"kind":"arxiv","id":"1606.03005","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.03005","created_at":"2026-05-18T00:30:33Z"},{"alias_kind":"arxiv_version","alias_value":"1606.03005v1","created_at":"2026-05-18T00:30:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.03005","created_at":"2026-05-18T00:30:33Z"},{"alias_kind":"pith_short_12","alias_value":"7KB265LOGVBA","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"7KB265LOGVBA65T7","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"7KB265LO","created_at":"2026-05-18T12:30:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:7KB265LOGVBA65T7572JKTZV46","target":"record","payload":{"canonical_record":{"source":{"id":"1606.03005","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-06-09T15:47:12Z","cross_cats_sorted":["quant-ph"],"title_canon_sha256":"52162e26cf4aa3fd581455e66744a5a4302008e89065658a949515e16c4a8695","abstract_canon_sha256":"7631c520c793b272b93150dec90f5bc69439b6693d0435d5ebab7fee557d66ae"},"schema_version":"1.0"},"canonical_sha256":"fa83af756e35420f767feff4954f35e7a1d16de1b12b9d2ca91d663f77bfe04e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:30:33.021208Z","signature_b64":"VhA0TbVIfJtS+4NumFSPDskfz0+TU3yKlMAIHkSKp3l0LYxHb3M6HrlxWNAuAAZktxymq3uDgIYxpV6YfnOWBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fa83af756e35420f767feff4954f35e7a1d16de1b12b9d2ca91d663f77bfe04e","last_reissued_at":"2026-05-18T00:30:33.020633Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:30:33.020633Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1606.03005","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":"2026-05-18T00:30:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yyf8zBPKBTwrPwvTili87Rf8Fi7zbpPPXajokZZAqp6PTuf9J4BFw8lyKDS8fH3TB7OVTDZIGVRkKGP2RF36Bw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T01:14:39.543175Z"},"content_sha256":"390e708f03c21f435a9f159cc92ce200985fe93b1901142481eb9c7252750088","schema_version":"1.0","event_id":"sha256:390e708f03c21f435a9f159cc92ce200985fe93b1901142481eb9c7252750088"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:7KB265LOGVBA65T7572JKTZV46","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Spacetime anisotropy affects cosmological entanglement","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["quant-ph"],"primary_cat":"gr-qc","authors_text":"Roberto Pierini, Shahpoor Moradi, Stefano Mancini","submitted_at":"2016-06-09T15:47:12Z","abstract_excerpt":"Most existing cosmological entanglement studies are focused on the isotropic Robertson-Walker (RW) spacetime. Here we go beyond this limitation and study the influence of anisotropy on entanglement generated by dynamical spacetime. Since the isotropic spacetime is viewed as a background medium and the anisotropy is incorporated as perturbation, we decompose entanglement entropy into isotropic and anisotropic contributions. The latter is shown to be non-negligible by analyzing two cosmological models with weak and conformal coupling. We also show the possibility of using entanglement to infer a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.03005","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":"2026-05-18T00:30:33Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pUTeqCgXvy8il0oOQNBBqHy1l/oaY6CGGtJ8YIK3Tx8CD8+DsLheaPhdVXKrPCAOC42XvWnna9przvtoA55IAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-02T01:14:39.543534Z"},"content_sha256":"aceefb023cb8c456dc50f69087a5946a72a7a36cf381e73e142c8d2fe8fc9ca5","schema_version":"1.0","event_id":"sha256:aceefb023cb8c456dc50f69087a5946a72a7a36cf381e73e142c8d2fe8fc9ca5"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7KB265LOGVBA65T7572JKTZV46/bundle.json","state_url":"https://pith.science/pith/7KB265LOGVBA65T7572JKTZV46/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7KB265LOGVBA65T7572JKTZV46/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":"2026-06-02T01:14:39Z","links":{"resolver":"https://pith.science/pith/7KB265LOGVBA65T7572JKTZV46","bundle":"https://pith.science/pith/7KB265LOGVBA65T7572JKTZV46/bundle.json","state":"https://pith.science/pith/7KB265LOGVBA65T7572JKTZV46/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7KB265LOGVBA65T7572JKTZV46/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:7KB265LOGVBA65T7572JKTZV46","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":"7631c520c793b272b93150dec90f5bc69439b6693d0435d5ebab7fee557d66ae","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-06-09T15:47:12Z","title_canon_sha256":"52162e26cf4aa3fd581455e66744a5a4302008e89065658a949515e16c4a8695"},"schema_version":"1.0","source":{"id":"1606.03005","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.03005","created_at":"2026-05-18T00:30:33Z"},{"alias_kind":"arxiv_version","alias_value":"1606.03005v1","created_at":"2026-05-18T00:30:33Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.03005","created_at":"2026-05-18T00:30:33Z"},{"alias_kind":"pith_short_12","alias_value":"7KB265LOGVBA","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_16","alias_value":"7KB265LOGVBA65T7","created_at":"2026-05-18T12:30:04Z"},{"alias_kind":"pith_short_8","alias_value":"7KB265LO","created_at":"2026-05-18T12:30:04Z"}],"graph_snapshots":[{"event_id":"sha256:aceefb023cb8c456dc50f69087a5946a72a7a36cf381e73e142c8d2fe8fc9ca5","target":"graph","created_at":"2026-05-18T00:30:33Z","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":"Most existing cosmological entanglement studies are focused on the isotropic Robertson-Walker (RW) spacetime. Here we go beyond this limitation and study the influence of anisotropy on entanglement generated by dynamical spacetime. Since the isotropic spacetime is viewed as a background medium and the anisotropy is incorporated as perturbation, we decompose entanglement entropy into isotropic and anisotropic contributions. The latter is shown to be non-negligible by analyzing two cosmological models with weak and conformal coupling. We also show the possibility of using entanglement to infer a","authors_text":"Roberto Pierini, Shahpoor Moradi, Stefano Mancini","cross_cats":["quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-06-09T15:47:12Z","title":"Spacetime anisotropy affects cosmological entanglement"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.03005","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":"sha256:390e708f03c21f435a9f159cc92ce200985fe93b1901142481eb9c7252750088","target":"record","created_at":"2026-05-18T00:30:33Z","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":"7631c520c793b272b93150dec90f5bc69439b6693d0435d5ebab7fee557d66ae","cross_cats_sorted":["quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"gr-qc","submitted_at":"2016-06-09T15:47:12Z","title_canon_sha256":"52162e26cf4aa3fd581455e66744a5a4302008e89065658a949515e16c4a8695"},"schema_version":"1.0","source":{"id":"1606.03005","kind":"arxiv","version":1}},"canonical_sha256":"fa83af756e35420f767feff4954f35e7a1d16de1b12b9d2ca91d663f77bfe04e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fa83af756e35420f767feff4954f35e7a1d16de1b12b9d2ca91d663f77bfe04e","first_computed_at":"2026-05-18T00:30:33.020633Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:30:33.020633Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VhA0TbVIfJtS+4NumFSPDskfz0+TU3yKlMAIHkSKp3l0LYxHb3M6HrlxWNAuAAZktxymq3uDgIYxpV6YfnOWBg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:30:33.021208Z","signed_message":"canonical_sha256_bytes"},"source_id":"1606.03005","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:390e708f03c21f435a9f159cc92ce200985fe93b1901142481eb9c7252750088","sha256:aceefb023cb8c456dc50f69087a5946a72a7a36cf381e73e142c8d2fe8fc9ca5"],"state_sha256":"f300a40531ebd04da61f462e3c7727987e4f4ce68b56449cdc8977b964d5b91e"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ild0lMHki9dXVIk7ELcz74t0Zp0wlQj7hKz2lNSHVdRqtO/jI9ou45oaysxOk2Hx8hHCXtSKVOGvy/CYdsqiCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-02T01:14:39.545432Z","bundle_sha256":"749a569ba406d16c58b3f49426a29337f06adcabda6c36e937e35dede3b9b527"}}