{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:5UJK7FPZJDYJPP2CQMNEJ32MXH","short_pith_number":"pith:5UJK7FPZ","canonical_record":{"source":{"id":"1211.1701","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-11-07T21:51:13Z","cross_cats_sorted":[],"title_canon_sha256":"cc3b58d03cb48e84fa55b2fa774f5fa80970982df4da3d03b04f98bd1ff0d911","abstract_canon_sha256":"e8a17879eabf21b3bfb3f72da249fde50c6c003bd6dee26f1c30602ef64fd072"},"schema_version":"1.0"},"canonical_sha256":"ed12af95f948f097bf42831a44ef4cb9e8cad724a8fee13f604820cf0ff74465","source":{"kind":"arxiv","id":"1211.1701","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.1701","created_at":"2026-05-18T03:16:06Z"},{"alias_kind":"arxiv_version","alias_value":"1211.1701v3","created_at":"2026-05-18T03:16:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.1701","created_at":"2026-05-18T03:16:06Z"},{"alias_kind":"pith_short_12","alias_value":"5UJK7FPZJDYJ","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"5UJK7FPZJDYJPP2C","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"5UJK7FPZ","created_at":"2026-05-18T12:26:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:5UJK7FPZJDYJPP2CQMNEJ32MXH","target":"record","payload":{"canonical_record":{"source":{"id":"1211.1701","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-11-07T21:51:13Z","cross_cats_sorted":[],"title_canon_sha256":"cc3b58d03cb48e84fa55b2fa774f5fa80970982df4da3d03b04f98bd1ff0d911","abstract_canon_sha256":"e8a17879eabf21b3bfb3f72da249fde50c6c003bd6dee26f1c30602ef64fd072"},"schema_version":"1.0"},"canonical_sha256":"ed12af95f948f097bf42831a44ef4cb9e8cad724a8fee13f604820cf0ff74465","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:16:06.346749Z","signature_b64":"nh/j/U+/j4+f+qSy+zDwEZRsyC+N1nRnOh2UEx7LStGhj//aNoWicLf3lJhoHgG2w1kY/9LQAaFNp4P7BdhuCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ed12af95f948f097bf42831a44ef4cb9e8cad724a8fee13f604820cf0ff74465","last_reissued_at":"2026-05-18T03:16:06.346343Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:16:06.346343Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1211.1701","source_version":3,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T03:16:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"s7dNkFHkKkXVs/fwrudOatlvDA1SX1KpVfj8vJY7m0s5VXvRgJfznLZBx07hLa24DUqLD159/XhQZBu/8htlAg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T08:08:11.958462Z"},"content_sha256":"1e6be1a7a08f35d75734bab5afd2755788eb9ab26bf1afa5831226ab72b45838","schema_version":"1.0","event_id":"sha256:1e6be1a7a08f35d75734bab5afd2755788eb9ab26bf1afa5831226ab72b45838"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:5UJK7FPZJDYJPP2CQMNEJ32MXH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Gaussification through decoherence","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Iulia Ghiu, Paulina Marian, Tudor A. Marian","submitted_at":"2012-11-07T21:51:13Z","abstract_excerpt":"We investigate the loss of nonclassicality and non-Gaussianity of a single-mode state of the radiation field in contact with a thermal reservoir. The damped density matrix for a Fock-diagonal input is written using the Weyl expansion of the density operator. Analysis of the evolution of the quasiprobability densities reveals the existence of two successive characteristic times of the reservoir which are sufficient to assure the positivity of the Wigner function and, respectively, of the $P$ representation. We examine the time evolution of non-Gaussianity using three recently introduced distanc"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.1701","kind":"arxiv","version":3},"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":"2026-05-18T03:16:06Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ep73DIHUKTzt1EXeeTa5y8GMkgOC4IerpdBKuU1ehCcNDmAGPTi0jNPphHJ/BLLgZRQZcoEPxjsqcQL03nm2BA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T08:08:11.959145Z"},"content_sha256":"88dc857821a08edcb5537729f201cc75171275db88f3c1b7aed4ac0ed6c875da","schema_version":"1.0","event_id":"sha256:88dc857821a08edcb5537729f201cc75171275db88f3c1b7aed4ac0ed6c875da"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5UJK7FPZJDYJPP2CQMNEJ32MXH/bundle.json","state_url":"https://pith.science/pith/5UJK7FPZJDYJPP2CQMNEJ32MXH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5UJK7FPZJDYJPP2CQMNEJ32MXH/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":"2026-05-27T08:08:11Z","links":{"resolver":"https://pith.science/pith/5UJK7FPZJDYJPP2CQMNEJ32MXH","bundle":"https://pith.science/pith/5UJK7FPZJDYJPP2CQMNEJ32MXH/bundle.json","state":"https://pith.science/pith/5UJK7FPZJDYJPP2CQMNEJ32MXH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5UJK7FPZJDYJPP2CQMNEJ32MXH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:5UJK7FPZJDYJPP2CQMNEJ32MXH","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":"e8a17879eabf21b3bfb3f72da249fde50c6c003bd6dee26f1c30602ef64fd072","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-11-07T21:51:13Z","title_canon_sha256":"cc3b58d03cb48e84fa55b2fa774f5fa80970982df4da3d03b04f98bd1ff0d911"},"schema_version":"1.0","source":{"id":"1211.1701","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1211.1701","created_at":"2026-05-18T03:16:06Z"},{"alias_kind":"arxiv_version","alias_value":"1211.1701v3","created_at":"2026-05-18T03:16:06Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1211.1701","created_at":"2026-05-18T03:16:06Z"},{"alias_kind":"pith_short_12","alias_value":"5UJK7FPZJDYJ","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_16","alias_value":"5UJK7FPZJDYJPP2C","created_at":"2026-05-18T12:26:56Z"},{"alias_kind":"pith_short_8","alias_value":"5UJK7FPZ","created_at":"2026-05-18T12:26:56Z"}],"graph_snapshots":[{"event_id":"sha256:88dc857821a08edcb5537729f201cc75171275db88f3c1b7aed4ac0ed6c875da","target":"graph","created_at":"2026-05-18T03:16:06Z","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 investigate the loss of nonclassicality and non-Gaussianity of a single-mode state of the radiation field in contact with a thermal reservoir. The damped density matrix for a Fock-diagonal input is written using the Weyl expansion of the density operator. Analysis of the evolution of the quasiprobability densities reveals the existence of two successive characteristic times of the reservoir which are sufficient to assure the positivity of the Wigner function and, respectively, of the $P$ representation. We examine the time evolution of non-Gaussianity using three recently introduced distanc","authors_text":"Iulia Ghiu, Paulina Marian, Tudor A. Marian","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-11-07T21:51:13Z","title":"Gaussification through decoherence"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1211.1701","kind":"arxiv","version":3},"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":"sha256:1e6be1a7a08f35d75734bab5afd2755788eb9ab26bf1afa5831226ab72b45838","target":"record","created_at":"2026-05-18T03:16:06Z","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":"e8a17879eabf21b3bfb3f72da249fde50c6c003bd6dee26f1c30602ef64fd072","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-11-07T21:51:13Z","title_canon_sha256":"cc3b58d03cb48e84fa55b2fa774f5fa80970982df4da3d03b04f98bd1ff0d911"},"schema_version":"1.0","source":{"id":"1211.1701","kind":"arxiv","version":3}},"canonical_sha256":"ed12af95f948f097bf42831a44ef4cb9e8cad724a8fee13f604820cf0ff74465","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ed12af95f948f097bf42831a44ef4cb9e8cad724a8fee13f604820cf0ff74465","first_computed_at":"2026-05-18T03:16:06.346343Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:16:06.346343Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"nh/j/U+/j4+f+qSy+zDwEZRsyC+N1nRnOh2UEx7LStGhj//aNoWicLf3lJhoHgG2w1kY/9LQAaFNp4P7BdhuCw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:16:06.346749Z","signed_message":"canonical_sha256_bytes"},"source_id":"1211.1701","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1e6be1a7a08f35d75734bab5afd2755788eb9ab26bf1afa5831226ab72b45838","sha256:88dc857821a08edcb5537729f201cc75171275db88f3c1b7aed4ac0ed6c875da"],"state_sha256":"0372bb5e60850d4232ee60eb2436222d703225603ff53fa9bc68ba418731a448"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XacN948nKvMJ5Fz/C0JbXbhvsxtMq9UOFRWIhhJweb+IwUPzQHQsLJD5/pIUPRuJKMhSD5UEzXZja+rnLkTBDA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T08:08:11.962945Z","bundle_sha256":"6f1f1ba1af5dabab8ea2da56119a8da449ab3a9227c2afd5286564521cb32d80"}}