{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2016:62XTDV56QEJGXRPGIG2UF2C6ZW","short_pith_number":"pith:62XTDV56","canonical_record":{"source":{"id":"1602.07626","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-02-24T18:13:43Z","cross_cats_sorted":[],"title_canon_sha256":"561ba06734c4ddcabf410f0e8da72415e58b72c42a87aadefe98a1511df40ed3","abstract_canon_sha256":"387a8154a8fd1e69557a582741dfbdf92f98480899f9e8ea5bce17befdca5d55"},"schema_version":"1.0"},"canonical_sha256":"f6af31d7be81126bc5e641b542e85ecdb5cb78f92cf3d4fa51aef649bc3a21dc","source":{"kind":"arxiv","id":"1602.07626","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.07626","created_at":"2026-05-18T01:15:13Z"},{"alias_kind":"arxiv_version","alias_value":"1602.07626v1","created_at":"2026-05-18T01:15:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.07626","created_at":"2026-05-18T01:15:13Z"},{"alias_kind":"pith_short_12","alias_value":"62XTDV56QEJG","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_16","alias_value":"62XTDV56QEJGXRPG","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_8","alias_value":"62XTDV56","created_at":"2026-05-18T12:30:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2016:62XTDV56QEJGXRPGIG2UF2C6ZW","target":"record","payload":{"canonical_record":{"source":{"id":"1602.07626","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-02-24T18:13:43Z","cross_cats_sorted":[],"title_canon_sha256":"561ba06734c4ddcabf410f0e8da72415e58b72c42a87aadefe98a1511df40ed3","abstract_canon_sha256":"387a8154a8fd1e69557a582741dfbdf92f98480899f9e8ea5bce17befdca5d55"},"schema_version":"1.0"},"canonical_sha256":"f6af31d7be81126bc5e641b542e85ecdb5cb78f92cf3d4fa51aef649bc3a21dc","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:15:13.903675Z","signature_b64":"MmJuVTfj4PZY8gY4z3otZNpdGJIA5NjyaIUkqBk1i+i5gNcTH4Fb1Pu2XEzDcDzVHc5TzREm3QhMXUdyVrJYAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"f6af31d7be81126bc5e641b542e85ecdb5cb78f92cf3d4fa51aef649bc3a21dc","last_reissued_at":"2026-05-18T01:15:13.902881Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:15:13.902881Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1602.07626","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":"2026-05-18T01:15:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iVJPnZUl6f7OXKI7HgXf+ATTZf9MQweVW7MAUDm1QEfKc/jY24sHeABDaqmC336nqbroS2aAiSe964FOB2BJCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T13:51:45.506633Z"},"content_sha256":"bea6f0922fae7203d3562fdae462fbce73256f4260de14d6b0766eb342e28a2f","schema_version":"1.0","event_id":"sha256:bea6f0922fae7203d3562fdae462fbce73256f4260de14d6b0766eb342e28a2f"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2016:62XTDV56QEJGXRPGIG2UF2C6ZW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Enhanced estimation of loss in the presence of Kerr nonlinearity","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Francesco Albarelli, Matteo A. C. Rossi, Matteo G. A. Paris","submitted_at":"2016-02-24T18:13:43Z","abstract_excerpt":"We address the characterization of dissipative bosonic channels and show that estimation of the loss rate by Gaussian probes (coherent or squeezed) is improved in the presence of Kerr nonlinearity. In particular, enhancement of precision may be substantial for short interaction time, i.e. for media of moderate size, e.g. biological samples. We analyze in detail the behaviour of the quantum Fisher information (QFI), and determine the values of nonlinearity maximizing the QFI as a function of the interaction time and of the parameters of the input signal. We also discuss the precision achievable"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.07626","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":"2026-05-18T01:15:13Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iJhoXA00M789rejEi7cmAz7BHSzgp+IL7MPaeSZVZEhg4hCOWNnww2EFRItauPV1w1fPzdMQU8MCIXvJGSSbBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-01T13:51:45.506970Z"},"content_sha256":"da595bad422c152132585db752dd7569372106b32b5aa1c17ae9a8e84f610a36","schema_version":"1.0","event_id":"sha256:da595bad422c152132585db752dd7569372106b32b5aa1c17ae9a8e84f610a36"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/62XTDV56QEJGXRPGIG2UF2C6ZW/bundle.json","state_url":"https://pith.science/pith/62XTDV56QEJGXRPGIG2UF2C6ZW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/62XTDV56QEJGXRPGIG2UF2C6ZW/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":"2026-06-01T13:51:45Z","links":{"resolver":"https://pith.science/pith/62XTDV56QEJGXRPGIG2UF2C6ZW","bundle":"https://pith.science/pith/62XTDV56QEJGXRPGIG2UF2C6ZW/bundle.json","state":"https://pith.science/pith/62XTDV56QEJGXRPGIG2UF2C6ZW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/62XTDV56QEJGXRPGIG2UF2C6ZW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:62XTDV56QEJGXRPGIG2UF2C6ZW","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":"387a8154a8fd1e69557a582741dfbdf92f98480899f9e8ea5bce17befdca5d55","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-02-24T18:13:43Z","title_canon_sha256":"561ba06734c4ddcabf410f0e8da72415e58b72c42a87aadefe98a1511df40ed3"},"schema_version":"1.0","source":{"id":"1602.07626","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1602.07626","created_at":"2026-05-18T01:15:13Z"},{"alias_kind":"arxiv_version","alias_value":"1602.07626v1","created_at":"2026-05-18T01:15:13Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1602.07626","created_at":"2026-05-18T01:15:13Z"},{"alias_kind":"pith_short_12","alias_value":"62XTDV56QEJG","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_16","alias_value":"62XTDV56QEJGXRPG","created_at":"2026-05-18T12:30:01Z"},{"alias_kind":"pith_short_8","alias_value":"62XTDV56","created_at":"2026-05-18T12:30:01Z"}],"graph_snapshots":[{"event_id":"sha256:da595bad422c152132585db752dd7569372106b32b5aa1c17ae9a8e84f610a36","target":"graph","created_at":"2026-05-18T01:15:13Z","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 address the characterization of dissipative bosonic channels and show that estimation of the loss rate by Gaussian probes (coherent or squeezed) is improved in the presence of Kerr nonlinearity. In particular, enhancement of precision may be substantial for short interaction time, i.e. for media of moderate size, e.g. biological samples. We analyze in detail the behaviour of the quantum Fisher information (QFI), and determine the values of nonlinearity maximizing the QFI as a function of the interaction time and of the parameters of the input signal. We also discuss the precision achievable","authors_text":"Francesco Albarelli, Matteo A. C. Rossi, Matteo G. A. Paris","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-02-24T18:13:43Z","title":"Enhanced estimation of loss in the presence of Kerr nonlinearity"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.07626","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:bea6f0922fae7203d3562fdae462fbce73256f4260de14d6b0766eb342e28a2f","target":"record","created_at":"2026-05-18T01:15:13Z","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":"387a8154a8fd1e69557a582741dfbdf92f98480899f9e8ea5bce17befdca5d55","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-02-24T18:13:43Z","title_canon_sha256":"561ba06734c4ddcabf410f0e8da72415e58b72c42a87aadefe98a1511df40ed3"},"schema_version":"1.0","source":{"id":"1602.07626","kind":"arxiv","version":1}},"canonical_sha256":"f6af31d7be81126bc5e641b542e85ecdb5cb78f92cf3d4fa51aef649bc3a21dc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f6af31d7be81126bc5e641b542e85ecdb5cb78f92cf3d4fa51aef649bc3a21dc","first_computed_at":"2026-05-18T01:15:13.902881Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:15:13.902881Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MmJuVTfj4PZY8gY4z3otZNpdGJIA5NjyaIUkqBk1i+i5gNcTH4Fb1Pu2XEzDcDzVHc5TzREm3QhMXUdyVrJYAA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:15:13.903675Z","signed_message":"canonical_sha256_bytes"},"source_id":"1602.07626","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:bea6f0922fae7203d3562fdae462fbce73256f4260de14d6b0766eb342e28a2f","sha256:da595bad422c152132585db752dd7569372106b32b5aa1c17ae9a8e84f610a36"],"state_sha256":"6622eb7571db4d7d08f1cc00364e8b65cb4ad810cf69cd6d20ecdf6e9c87bc2b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uk8epJGRvJs8Ec7D2EeH20cR8+TgFzkhBHeoZwk+GW/w2wF25covFbxWPRMDDLRHDRIm8HPcJEO1Sm0E0TyuAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T13:51:45.508712Z","bundle_sha256":"2372b045e140e4456312e1aef1e3ce2a710dd1dab06a8b6560d69f341a7cf094"}}