{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:ENYSFFVA6TF3ZITJ5S3X7C2AXW","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":"ee1dc96a37faec93813f90539a1d21685a76f9190f730dd43643b47584ae1cc4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-09-14T05:23:01Z","title_canon_sha256":"ed9413d3466da7f12841672e18b16f5f8e25c1ad1ecd1741909aefde480a7b2e"},"schema_version":"1.0","source":{"id":"1509.03955","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1509.03955","created_at":"2026-05-18T01:32:26Z"},{"alias_kind":"arxiv_version","alias_value":"1509.03955v1","created_at":"2026-05-18T01:32:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1509.03955","created_at":"2026-05-18T01:32:26Z"},{"alias_kind":"pith_short_12","alias_value":"ENYSFFVA6TF3","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"ENYSFFVA6TF3ZITJ","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"ENYSFFVA","created_at":"2026-05-18T12:29:19Z"}],"graph_snapshots":[{"event_id":"sha256:a7eb2fb6e908177d32c5cb0732bd0dcc4b7d99c70832bf179fac180741515275","target":"graph","created_at":"2026-05-18T01:32:26Z","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":"The effects of reservoir squeezing on the precision of parameter estimation are investigated analytically based on non-perturbation procedures. The exact analytic quantum Fisher information (QFI) is obtained. It is shown that the QFI depends on the estimated parameter and its decay could be reduced by the squeezed reservoir compared with thermal (vacuum) reservoir, in particular, if the squeezing phase matching is satisfied.","authors_text":"Chang-shui Yu, He-Shan Song, Shao-xiong Wu","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-09-14T05:23:01Z","title":"Effects of the reservoir squeezing on the precision of parameter estimation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1509.03955","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:b078d61b9bebdd30b7a159e77a61f5365d016e17d11632cd78de0efdede4d2ef","target":"record","created_at":"2026-05-18T01:32:26Z","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":"ee1dc96a37faec93813f90539a1d21685a76f9190f730dd43643b47584ae1cc4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-09-14T05:23:01Z","title_canon_sha256":"ed9413d3466da7f12841672e18b16f5f8e25c1ad1ecd1741909aefde480a7b2e"},"schema_version":"1.0","source":{"id":"1509.03955","kind":"arxiv","version":1}},"canonical_sha256":"23712296a0f4cbbca269ecb77f8b40bd99b7d822863843a72c78e72ea0ac3754","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"23712296a0f4cbbca269ecb77f8b40bd99b7d822863843a72c78e72ea0ac3754","first_computed_at":"2026-05-18T01:32:26.470539Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:32:26.470539Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"7nL6+jqw5JJVIl1NL7ncNaY2IKF7FiGnN3ZAaS5DaH45AAdPIfok9m68OrESYRF7XF4mI0CEGO1JmWoPJVfNAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:32:26.471216Z","signed_message":"canonical_sha256_bytes"},"source_id":"1509.03955","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b078d61b9bebdd30b7a159e77a61f5365d016e17d11632cd78de0efdede4d2ef","sha256:a7eb2fb6e908177d32c5cb0732bd0dcc4b7d99c70832bf179fac180741515275"],"state_sha256":"a4ed97ae0af0d364ecb381e8e781ca1752cf6f20910cf3f8569e71bb34cbf2ec"}