{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:4F5KJCS22WAB34NBEWKLELRL7O","short_pith_number":"pith:4F5KJCS2","canonical_record":{"source":{"id":"0910.5358","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"quant-ph","submitted_at":"2009-10-28T12:02:42Z","cross_cats_sorted":[],"title_canon_sha256":"f3392158fc8f4e598e59cde77d76b6f326d06340ab76d35342184a56c9adc6e7","abstract_canon_sha256":"c9689d95357ecdb38a0a34c23e0d342d4faf29e4fd67f02ee1b4168a571c94d0"},"schema_version":"1.0"},"canonical_sha256":"e17aa48a5ad5801df1a12594b22e2bfbb7631a4e6ffb5e3f3f75c1a36004c24a","source":{"kind":"arxiv","id":"0910.5358","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.5358","created_at":"2026-05-18T02:11:02Z"},{"alias_kind":"arxiv_version","alias_value":"0910.5358v1","created_at":"2026-05-18T02:11:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.5358","created_at":"2026-05-18T02:11:02Z"},{"alias_kind":"pith_short_12","alias_value":"4F5KJCS22WAB","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"4F5KJCS22WAB34NB","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"4F5KJCS2","created_at":"2026-05-18T12:25:58Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:4F5KJCS22WAB34NBEWKLELRL7O","target":"record","payload":{"canonical_record":{"source":{"id":"0910.5358","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"quant-ph","submitted_at":"2009-10-28T12:02:42Z","cross_cats_sorted":[],"title_canon_sha256":"f3392158fc8f4e598e59cde77d76b6f326d06340ab76d35342184a56c9adc6e7","abstract_canon_sha256":"c9689d95357ecdb38a0a34c23e0d342d4faf29e4fd67f02ee1b4168a571c94d0"},"schema_version":"1.0"},"canonical_sha256":"e17aa48a5ad5801df1a12594b22e2bfbb7631a4e6ffb5e3f3f75c1a36004c24a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:11:02.249852Z","signature_b64":"mfaE7THObPC8+aJ2F6Dz3pN4ENlifJalfyMoAHnAU5fX8kpJF2Ww82KTspiyerxe6n0LPzpZ/9tUwNZEJvzTDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"e17aa48a5ad5801df1a12594b22e2bfbb7631a4e6ffb5e3f3f75c1a36004c24a","last_reissued_at":"2026-05-18T02:11:02.249036Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:11:02.249036Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0910.5358","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":"2026-05-18T02:11:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aNJ62AP8tfNCneKY1CsaR8+tDKjuNCIOhxfGJMfM8qfbfWKOHqZFqOp82RYb0NklipPMujoREeO+vpMpSRVQDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T21:05:05.654213Z"},"content_sha256":"a52da95ea2c80eb9b6add447345dcb636cad7959e345786c6e5d3571b38a89a0","schema_version":"1.0","event_id":"sha256:a52da95ea2c80eb9b6add447345dcb636cad7959e345786c6e5d3571b38a89a0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:4F5KJCS22WAB34NBEWKLELRL7O","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Nonclassicality of photon-added squeezed vacuum and its decoherence in thermal environment","license":"http://creativecommons.org/licenses/by/3.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Hong-yi Fan, Li-yun Hu","submitted_at":"2009-10-28T12:02:42Z","abstract_excerpt":"We study the nonclassicality of photon-added squeezed vacuum (PASV) and its decoherence in thermal environment in terms of the sub-Poissonian statistics and the negativity of Wigner function (WF). By converting the PASV to a squeezed Hermite polynomial excitation state, we derive a compact expression for the normalization factor of m-PASV, which is an m-order Legendre polynomial of squeezing parameter r. We also derive the explicit expression of WF of m-PASV and find the negative region of WF in phase space. We show that there is an upper bound value of r for this state to exhibit sub-Poissoni"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.5358","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":"2026-05-18T02:11:02Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZMUYyWvTx0UMZaxCHHvMMdrSscc3v+VAkNK26dV3rLssKyN4YaxfXcLfCVNbg8Uv6CIInskppWnFOwTlP2a8Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-29T21:05:05.654822Z"},"content_sha256":"d522fd31696ae0fa6b3b77f761e603217ac59b0ac25c84480cf045f21e6852d1","schema_version":"1.0","event_id":"sha256:d522fd31696ae0fa6b3b77f761e603217ac59b0ac25c84480cf045f21e6852d1"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/4F5KJCS22WAB34NBEWKLELRL7O/bundle.json","state_url":"https://pith.science/pith/4F5KJCS22WAB34NBEWKLELRL7O/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/4F5KJCS22WAB34NBEWKLELRL7O/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":"2026-05-29T21:05:05Z","links":{"resolver":"https://pith.science/pith/4F5KJCS22WAB34NBEWKLELRL7O","bundle":"https://pith.science/pith/4F5KJCS22WAB34NBEWKLELRL7O/bundle.json","state":"https://pith.science/pith/4F5KJCS22WAB34NBEWKLELRL7O/state.json","well_known_bundle":"https://pith.science/.well-known/pith/4F5KJCS22WAB34NBEWKLELRL7O/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:4F5KJCS22WAB34NBEWKLELRL7O","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":"c9689d95357ecdb38a0a34c23e0d342d4faf29e4fd67f02ee1b4168a571c94d0","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"quant-ph","submitted_at":"2009-10-28T12:02:42Z","title_canon_sha256":"f3392158fc8f4e598e59cde77d76b6f326d06340ab76d35342184a56c9adc6e7"},"schema_version":"1.0","source":{"id":"0910.5358","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0910.5358","created_at":"2026-05-18T02:11:02Z"},{"alias_kind":"arxiv_version","alias_value":"0910.5358v1","created_at":"2026-05-18T02:11:02Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.5358","created_at":"2026-05-18T02:11:02Z"},{"alias_kind":"pith_short_12","alias_value":"4F5KJCS22WAB","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_16","alias_value":"4F5KJCS22WAB34NB","created_at":"2026-05-18T12:25:58Z"},{"alias_kind":"pith_short_8","alias_value":"4F5KJCS2","created_at":"2026-05-18T12:25:58Z"}],"graph_snapshots":[{"event_id":"sha256:d522fd31696ae0fa6b3b77f761e603217ac59b0ac25c84480cf045f21e6852d1","target":"graph","created_at":"2026-05-18T02:11:02Z","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 nonclassicality of photon-added squeezed vacuum (PASV) and its decoherence in thermal environment in terms of the sub-Poissonian statistics and the negativity of Wigner function (WF). By converting the PASV to a squeezed Hermite polynomial excitation state, we derive a compact expression for the normalization factor of m-PASV, which is an m-order Legendre polynomial of squeezing parameter r. We also derive the explicit expression of WF of m-PASV and find the negative region of WF in phase space. We show that there is an upper bound value of r for this state to exhibit sub-Poissoni","authors_text":"Hong-yi Fan, Li-yun Hu","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"quant-ph","submitted_at":"2009-10-28T12:02:42Z","title":"Nonclassicality of photon-added squeezed vacuum and its decoherence in thermal environment"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.5358","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:a52da95ea2c80eb9b6add447345dcb636cad7959e345786c6e5d3571b38a89a0","target":"record","created_at":"2026-05-18T02:11:02Z","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":"c9689d95357ecdb38a0a34c23e0d342d4faf29e4fd67f02ee1b4168a571c94d0","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/3.0/","primary_cat":"quant-ph","submitted_at":"2009-10-28T12:02:42Z","title_canon_sha256":"f3392158fc8f4e598e59cde77d76b6f326d06340ab76d35342184a56c9adc6e7"},"schema_version":"1.0","source":{"id":"0910.5358","kind":"arxiv","version":1}},"canonical_sha256":"e17aa48a5ad5801df1a12594b22e2bfbb7631a4e6ffb5e3f3f75c1a36004c24a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e17aa48a5ad5801df1a12594b22e2bfbb7631a4e6ffb5e3f3f75c1a36004c24a","first_computed_at":"2026-05-18T02:11:02.249036Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:11:02.249036Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mfaE7THObPC8+aJ2F6Dz3pN4ENlifJalfyMoAHnAU5fX8kpJF2Ww82KTspiyerxe6n0LPzpZ/9tUwNZEJvzTDQ==","signature_status":"signed_v1","signed_at":"2026-05-18T02:11:02.249852Z","signed_message":"canonical_sha256_bytes"},"source_id":"0910.5358","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a52da95ea2c80eb9b6add447345dcb636cad7959e345786c6e5d3571b38a89a0","sha256:d522fd31696ae0fa6b3b77f761e603217ac59b0ac25c84480cf045f21e6852d1"],"state_sha256":"06a2dd8e714f21e9a781e1cf1ffc55583062be4c81d37253ae725300d13b3742"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VKVWk6/vBdR7miaTcKbWkaD2QxFelQiyCVq9eQrz5bchI4sVBPMohgZ4TkhY/EFUCs1MnymUMXSGnb62siDDCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-29T21:05:05.657665Z","bundle_sha256":"e87cfd2262a216278003991baa82b7ade6390629f160b35bd91759ed8d5738e7"}}