{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:BT5UIFO37TXHKGI5TNGCLSY2UB","short_pith_number":"pith:BT5UIFO3","canonical_record":{"source":{"id":"2002.03249","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-02-08T23:19:22Z","cross_cats_sorted":[],"title_canon_sha256":"0aedc64f2527c67bd2649500d732b3acdfd8e4bcdf02989b7ec7b37ee1685f0c","abstract_canon_sha256":"80a7be7065ede7770c3b6d30bcc3e5f61582485fdaade0d532599a5ca30e8c58"},"schema_version":"1.0"},"canonical_sha256":"0cfb4415dbfcee75191d9b4c25cb1aa074e1c26a994387294de3266292058cbf","source":{"kind":"arxiv","id":"2002.03249","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.03249","created_at":"2026-07-05T08:23:05Z"},{"alias_kind":"arxiv_version","alias_value":"2002.03249v4","created_at":"2026-07-05T08:23:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.03249","created_at":"2026-07-05T08:23:05Z"},{"alias_kind":"pith_short_12","alias_value":"BT5UIFO37TXH","created_at":"2026-07-05T08:23:05Z"},{"alias_kind":"pith_short_16","alias_value":"BT5UIFO37TXHKGI5","created_at":"2026-07-05T08:23:05Z"},{"alias_kind":"pith_short_8","alias_value":"BT5UIFO3","created_at":"2026-07-05T08:23:05Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:BT5UIFO37TXHKGI5TNGCLSY2UB","target":"record","payload":{"canonical_record":{"source":{"id":"2002.03249","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-02-08T23:19:22Z","cross_cats_sorted":[],"title_canon_sha256":"0aedc64f2527c67bd2649500d732b3acdfd8e4bcdf02989b7ec7b37ee1685f0c","abstract_canon_sha256":"80a7be7065ede7770c3b6d30bcc3e5f61582485fdaade0d532599a5ca30e8c58"},"schema_version":"1.0"},"canonical_sha256":"0cfb4415dbfcee75191d9b4c25cb1aa074e1c26a994387294de3266292058cbf","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:23:05.440695Z","signature_b64":"MQH+rJO/sEyAi9wrSkGor04KSvHWPpmtRVCXGPPvJ/kVlgLN3DBS7cfcxUuZFL+bXrCQS1hu7SgOWUYxO0k4DA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0cfb4415dbfcee75191d9b4c25cb1aa074e1c26a994387294de3266292058cbf","last_reissued_at":"2026-07-05T08:23:05.440224Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:23:05.440224Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2002.03249","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T08:23:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7D3Ex1CvYFJCQwxbpKb0Ba+fVdSiRmbiA9xWM9pc8C/bPxbdiJS8D08OCl4TUEjG30lTrNYZRv6ke0M7AT3qAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T11:55:39.245248Z"},"content_sha256":"2df044a59738c3eac1da4777cd8783024aa8b0f3dd23a67668cd3480a59e3b36","schema_version":"1.0","event_id":"sha256:2df044a59738c3eac1da4777cd8783024aa8b0f3dd23a67668cd3480a59e3b36"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:BT5UIFO37TXHKGI5TNGCLSY2UB","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Fisher-information-based estimation of optomechanical coupling strengths","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Andr\\'e Xuereb, Claudio Sanavio, J\\'ozsef Zsolt Bern\\'ad","submitted_at":"2020-02-08T23:19:22Z","abstract_excerpt":"The formalism of quantum estimation theory, focusing on the quantum and classical Fisher information, is applied to the estimation of the coupling strength in an optomechanical system. In order to estimate the optomechanical coupling, we have considered a cavity optomechanical model with non-Markovian Brownian motion of the mirror and employed input-output formalism to obtain the cavity output field. Our estimation scenario is based on balanced homodyne photodetection of the cavity output field. We have explored the difference between the associated measurement-dependent classical Fisher infor"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.03249","kind":"arxiv","version":4},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2002.03249/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T08:23:05Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oOS/Q0jRGguX+ghX1lewQJtef0nMHzO+fhUknbYe6kheHZiJJ7ffuEb4sPfyI6pHnapQmE0bZ55Xaav8RzbnAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-18T11:55:39.245921Z"},"content_sha256":"4910b3bcd4ffa7147ad6ce8bb6b1e1567503eea41874822847fd38d98fa91e15","schema_version":"1.0","event_id":"sha256:4910b3bcd4ffa7147ad6ce8bb6b1e1567503eea41874822847fd38d98fa91e15"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BT5UIFO37TXHKGI5TNGCLSY2UB/bundle.json","state_url":"https://pith.science/pith/BT5UIFO37TXHKGI5TNGCLSY2UB/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BT5UIFO37TXHKGI5TNGCLSY2UB/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":"2026-08-18T11:55:39Z","links":{"resolver":"https://pith.science/pith/BT5UIFO37TXHKGI5TNGCLSY2UB","bundle":"https://pith.science/pith/BT5UIFO37TXHKGI5TNGCLSY2UB/bundle.json","state":"https://pith.science/pith/BT5UIFO37TXHKGI5TNGCLSY2UB/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BT5UIFO37TXHKGI5TNGCLSY2UB/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:BT5UIFO37TXHKGI5TNGCLSY2UB","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":"80a7be7065ede7770c3b6d30bcc3e5f61582485fdaade0d532599a5ca30e8c58","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-02-08T23:19:22Z","title_canon_sha256":"0aedc64f2527c67bd2649500d732b3acdfd8e4bcdf02989b7ec7b37ee1685f0c"},"schema_version":"1.0","source":{"id":"2002.03249","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2002.03249","created_at":"2026-07-05T08:23:05Z"},{"alias_kind":"arxiv_version","alias_value":"2002.03249v4","created_at":"2026-07-05T08:23:05Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2002.03249","created_at":"2026-07-05T08:23:05Z"},{"alias_kind":"pith_short_12","alias_value":"BT5UIFO37TXH","created_at":"2026-07-05T08:23:05Z"},{"alias_kind":"pith_short_16","alias_value":"BT5UIFO37TXHKGI5","created_at":"2026-07-05T08:23:05Z"},{"alias_kind":"pith_short_8","alias_value":"BT5UIFO3","created_at":"2026-07-05T08:23:05Z"}],"graph_snapshots":[{"event_id":"sha256:4910b3bcd4ffa7147ad6ce8bb6b1e1567503eea41874822847fd38d98fa91e15","target":"graph","created_at":"2026-07-05T08:23:05Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2002.03249/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The formalism of quantum estimation theory, focusing on the quantum and classical Fisher information, is applied to the estimation of the coupling strength in an optomechanical system. In order to estimate the optomechanical coupling, we have considered a cavity optomechanical model with non-Markovian Brownian motion of the mirror and employed input-output formalism to obtain the cavity output field. Our estimation scenario is based on balanced homodyne photodetection of the cavity output field. We have explored the difference between the associated measurement-dependent classical Fisher infor","authors_text":"Andr\\'e Xuereb, Claudio Sanavio, J\\'ozsef Zsolt Bern\\'ad","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-02-08T23:19:22Z","title":"Fisher-information-based estimation of optomechanical coupling strengths"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2002.03249","kind":"arxiv","version":4},"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":"sha256:2df044a59738c3eac1da4777cd8783024aa8b0f3dd23a67668cd3480a59e3b36","target":"record","created_at":"2026-07-05T08:23:05Z","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":"80a7be7065ede7770c3b6d30bcc3e5f61582485fdaade0d532599a5ca30e8c58","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2020-02-08T23:19:22Z","title_canon_sha256":"0aedc64f2527c67bd2649500d732b3acdfd8e4bcdf02989b7ec7b37ee1685f0c"},"schema_version":"1.0","source":{"id":"2002.03249","kind":"arxiv","version":4}},"canonical_sha256":"0cfb4415dbfcee75191d9b4c25cb1aa074e1c26a994387294de3266292058cbf","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0cfb4415dbfcee75191d9b4c25cb1aa074e1c26a994387294de3266292058cbf","first_computed_at":"2026-07-05T08:23:05.440224Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T08:23:05.440224Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MQH+rJO/sEyAi9wrSkGor04KSvHWPpmtRVCXGPPvJ/kVlgLN3DBS7cfcxUuZFL+bXrCQS1hu7SgOWUYxO0k4DA==","signature_status":"signed_v1","signed_at":"2026-07-05T08:23:05.440695Z","signed_message":"canonical_sha256_bytes"},"source_id":"2002.03249","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2df044a59738c3eac1da4777cd8783024aa8b0f3dd23a67668cd3480a59e3b36","sha256:4910b3bcd4ffa7147ad6ce8bb6b1e1567503eea41874822847fd38d98fa91e15"],"state_sha256":"66d3f1eef8946d12d202dc197215fd948b45da10aa5127148583970395e0b46f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"jyLvUa3S793ViPBZM7yD3AU27o7VwxSJzF5tOWweJEbPLi1vfhZ4xrXjJGuA4wQv8x9qvwyDLvi/RYJGj+D5DA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-18T11:55:39.252098Z","bundle_sha256":"adb6617524c5cd2e6b7206252901e47c1a1a2f70cb2ad051e6c375a4470603e2"}}