{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:W2BLEBMXDMTDKFNZPPQXMGBKW2","short_pith_number":"pith:W2BLEBMX","canonical_record":{"source":{"id":"1208.0198","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-08-01T12:57:13Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"03fb6b9d964f1b4eb7ea4c9d7fd306713763a50a4d2759068b8ad330a5da99b1","abstract_canon_sha256":"7234e252c72b89e6f3cfb6b807232c9dcb05b1c661dd0392e1f05dfcdf84395b"},"schema_version":"1.0"},"canonical_sha256":"b682b205971b263515b97be176182ab6a9b551990777bf0dca54541bf070da0b","source":{"kind":"arxiv","id":"1208.0198","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.0198","created_at":"2026-05-18T01:55:24Z"},{"alias_kind":"arxiv_version","alias_value":"1208.0198v1","created_at":"2026-05-18T01:55:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.0198","created_at":"2026-05-18T01:55:24Z"},{"alias_kind":"pith_short_12","alias_value":"W2BLEBMXDMTD","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"W2BLEBMXDMTDKFNZ","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"W2BLEBMX","created_at":"2026-05-18T12:27:25Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:W2BLEBMXDMTDKFNZPPQXMGBKW2","target":"record","payload":{"canonical_record":{"source":{"id":"1208.0198","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-08-01T12:57:13Z","cross_cats_sorted":["gr-qc","hep-th"],"title_canon_sha256":"03fb6b9d964f1b4eb7ea4c9d7fd306713763a50a4d2759068b8ad330a5da99b1","abstract_canon_sha256":"7234e252c72b89e6f3cfb6b807232c9dcb05b1c661dd0392e1f05dfcdf84395b"},"schema_version":"1.0"},"canonical_sha256":"b682b205971b263515b97be176182ab6a9b551990777bf0dca54541bf070da0b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:55:24.473361Z","signature_b64":"3HIUh7+mzZFkzJSBMbA0B7ZxJ8ePxuKsp7ypElv3tWja0h9ftb8EjhQBo53xGontMvQEg4IVwALwsI7z7c+oDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"b682b205971b263515b97be176182ab6a9b551990777bf0dca54541bf070da0b","last_reissued_at":"2026-05-18T01:55:24.472761Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:55:24.472761Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1208.0198","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":"2026-05-18T01:55:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9ZQ7db5eXL1jID6r1UTYfXxFmAaSpjUK+JT5EjPX1fQIisAXbjqnRWaDFLV4CQkAXK36CpJPW01K5+ZFAycFCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T15:26:48.874240Z"},"content_sha256":"cab08e8afeaa9d57b1116b926e8cd3be395835d39c36995435e7b19518488f42","schema_version":"1.0","event_id":"sha256:cab08e8afeaa9d57b1116b926e8cd3be395835d39c36995435e7b19518488f42"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:W2BLEBMXDMTDKFNZPPQXMGBKW2","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dynamics of an Acoustic Black Hole as an Open Quantum System","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["gr-qc","hep-th"],"primary_cat":"quant-ph","authors_text":"Fernando C. Lombardo, Gustavo J. Turiaci","submitted_at":"2012-08-01T12:57:13Z","abstract_excerpt":"We studied the process of decoherence induced by the presence of an environment in acoustic black holes, using the open quantum system approach, thus extending previous work. We focused on the ion trap model but the formalism is general to any experimental implementation. We computed the decoherence time for that setup. We found that a quantum to classical transition occurs during the measurement and we proposed improved parameters to avoid such a feature. We provide analytic estimations for both zero and finite temperature. We also studied the entanglement between the Hawking-pair phonons for"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.0198","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":"2026-05-18T01:55:24Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DNEVavOYlUyk11vXVYRJ4cjbQKzTbOe37N2PWqCaOEmutLuVkK0AJsua1TFVl5y44awAEPxTq56JgaSTsRaPDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-30T15:26:48.874620Z"},"content_sha256":"773350cf6a4cdddf6c32b0b7ecfb8ab97f9df95c9ebf2c1c738da10a1ea79c80","schema_version":"1.0","event_id":"sha256:773350cf6a4cdddf6c32b0b7ecfb8ab97f9df95c9ebf2c1c738da10a1ea79c80"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/W2BLEBMXDMTDKFNZPPQXMGBKW2/bundle.json","state_url":"https://pith.science/pith/W2BLEBMXDMTDKFNZPPQXMGBKW2/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/W2BLEBMXDMTDKFNZPPQXMGBKW2/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":"2026-05-30T15:26:48Z","links":{"resolver":"https://pith.science/pith/W2BLEBMXDMTDKFNZPPQXMGBKW2","bundle":"https://pith.science/pith/W2BLEBMXDMTDKFNZPPQXMGBKW2/bundle.json","state":"https://pith.science/pith/W2BLEBMXDMTDKFNZPPQXMGBKW2/state.json","well_known_bundle":"https://pith.science/.well-known/pith/W2BLEBMXDMTDKFNZPPQXMGBKW2/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:W2BLEBMXDMTDKFNZPPQXMGBKW2","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":"7234e252c72b89e6f3cfb6b807232c9dcb05b1c661dd0392e1f05dfcdf84395b","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-08-01T12:57:13Z","title_canon_sha256":"03fb6b9d964f1b4eb7ea4c9d7fd306713763a50a4d2759068b8ad330a5da99b1"},"schema_version":"1.0","source":{"id":"1208.0198","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1208.0198","created_at":"2026-05-18T01:55:24Z"},{"alias_kind":"arxiv_version","alias_value":"1208.0198v1","created_at":"2026-05-18T01:55:24Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1208.0198","created_at":"2026-05-18T01:55:24Z"},{"alias_kind":"pith_short_12","alias_value":"W2BLEBMXDMTD","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_16","alias_value":"W2BLEBMXDMTDKFNZ","created_at":"2026-05-18T12:27:25Z"},{"alias_kind":"pith_short_8","alias_value":"W2BLEBMX","created_at":"2026-05-18T12:27:25Z"}],"graph_snapshots":[{"event_id":"sha256:773350cf6a4cdddf6c32b0b7ecfb8ab97f9df95c9ebf2c1c738da10a1ea79c80","target":"graph","created_at":"2026-05-18T01:55:24Z","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 studied the process of decoherence induced by the presence of an environment in acoustic black holes, using the open quantum system approach, thus extending previous work. We focused on the ion trap model but the formalism is general to any experimental implementation. We computed the decoherence time for that setup. We found that a quantum to classical transition occurs during the measurement and we proposed improved parameters to avoid such a feature. We provide analytic estimations for both zero and finite temperature. We also studied the entanglement between the Hawking-pair phonons for","authors_text":"Fernando C. Lombardo, Gustavo J. Turiaci","cross_cats":["gr-qc","hep-th"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-08-01T12:57:13Z","title":"Dynamics of an Acoustic Black Hole as an Open Quantum System"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1208.0198","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:cab08e8afeaa9d57b1116b926e8cd3be395835d39c36995435e7b19518488f42","target":"record","created_at":"2026-05-18T01:55:24Z","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":"7234e252c72b89e6f3cfb6b807232c9dcb05b1c661dd0392e1f05dfcdf84395b","cross_cats_sorted":["gr-qc","hep-th"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-08-01T12:57:13Z","title_canon_sha256":"03fb6b9d964f1b4eb7ea4c9d7fd306713763a50a4d2759068b8ad330a5da99b1"},"schema_version":"1.0","source":{"id":"1208.0198","kind":"arxiv","version":1}},"canonical_sha256":"b682b205971b263515b97be176182ab6a9b551990777bf0dca54541bf070da0b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"b682b205971b263515b97be176182ab6a9b551990777bf0dca54541bf070da0b","first_computed_at":"2026-05-18T01:55:24.472761Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:55:24.472761Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3HIUh7+mzZFkzJSBMbA0B7ZxJ8ePxuKsp7ypElv3tWja0h9ftb8EjhQBo53xGontMvQEg4IVwALwsI7z7c+oDw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:55:24.473361Z","signed_message":"canonical_sha256_bytes"},"source_id":"1208.0198","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:cab08e8afeaa9d57b1116b926e8cd3be395835d39c36995435e7b19518488f42","sha256:773350cf6a4cdddf6c32b0b7ecfb8ab97f9df95c9ebf2c1c738da10a1ea79c80"],"state_sha256":"c9ba3ecd9d9be586a392370f43c2a2bf7c58bf889d80cfea17516361ac533d45"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"w1mtBSge4+kkJzrOWH9brcTcQ819jL7Twdigz9YIRogarrJJ5ncHdHLiGWAEBIZXcwjvUOcHHkaIbTk28pSSCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-30T15:26:48.876625Z","bundle_sha256":"a02394c271a49c708207692ead7bed9bffe04dd4bf981c2ae8949be024cfcc62"}}