{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:K4LK7VTRSLNENJX4JEBW65OXEV","short_pith_number":"pith:K4LK7VTR","canonical_record":{"source":{"id":"0906.4463","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-06-24T15:26:04Z","cross_cats_sorted":[],"title_canon_sha256":"8b90d64682c8a858112fad7f1f17432dcd04ab48566d5b788352b14011867838","abstract_canon_sha256":"582d123a4131dbc32c2cd231914ee9b1a0e33c7c3692f20a58f95c05520a3461"},"schema_version":"1.0"},"canonical_sha256":"5716afd67192da46a6fc49036f75d7254f7d77218f4984612f423e4ca544655a","source":{"kind":"arxiv","id":"0906.4463","version":3},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.4463","created_at":"2026-07-04T17:19:31Z"},{"alias_kind":"arxiv_version","alias_value":"0906.4463v3","created_at":"2026-07-04T17:19:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.4463","created_at":"2026-07-04T17:19:31Z"},{"alias_kind":"pith_short_12","alias_value":"K4LK7VTRSLNE","created_at":"2026-07-04T17:19:31Z"},{"alias_kind":"pith_short_16","alias_value":"K4LK7VTRSLNENJX4","created_at":"2026-07-04T17:19:31Z"},{"alias_kind":"pith_short_8","alias_value":"K4LK7VTR","created_at":"2026-07-04T17:19:31Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:K4LK7VTRSLNENJX4JEBW65OXEV","target":"record","payload":{"canonical_record":{"source":{"id":"0906.4463","kind":"arxiv","version":3},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-06-24T15:26:04Z","cross_cats_sorted":[],"title_canon_sha256":"8b90d64682c8a858112fad7f1f17432dcd04ab48566d5b788352b14011867838","abstract_canon_sha256":"582d123a4131dbc32c2cd231914ee9b1a0e33c7c3692f20a58f95c05520a3461"},"schema_version":"1.0"},"canonical_sha256":"5716afd67192da46a6fc49036f75d7254f7d77218f4984612f423e4ca544655a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:19:31.055519Z","signature_b64":"LriBgizO9jwPrqMwUojHpufxXVlvHiiM0001Oxr9cEUe5c1mvRwzvevRNyjqJOtZ7xBwCkM3WSdWojnb6vSuAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5716afd67192da46a6fc49036f75d7254f7d77218f4984612f423e4ca544655a","last_reissued_at":"2026-07-04T17:19:31.055140Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:19:31.055140Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0906.4463","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":"2026-07-04T17:19:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xthBdxXOGGXFxyx1KdJR2HSolhXip26whsYcepoMFCLxFOoT8k4YnfOItwR20Tgkd/8bEmSjPpcgBLSNyOwLCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T01:48:24.104924Z"},"content_sha256":"92d5b950a16b750d1aff3d02d0f8efc52b6a26247f5d6f35161da9fead0fa459","schema_version":"1.0","event_id":"sha256:92d5b950a16b750d1aff3d02d0f8efc52b6a26247f5d6f35161da9fead0fa459"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:K4LK7VTRSLNENJX4JEBW65OXEV","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optimal Measurement on Noisy Quantum Systems","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Masahito Ueda, Takahiro Sagawa, Yu Watanabe","submitted_at":"2009-06-24T15:26:04Z","abstract_excerpt":"We identify the optimal measurement for obtaining information about the original quantum state after the state to be measured has undergone partial decoherence due to noise. We quantify the information that can be obtained by the measurement in terms of the Fisher information and find its value for the optimal measurement. We apply our results to a quantum control scheme based on a spin-boson model."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.4463","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0906.4463/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":"2026-07-04T17:19:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tIEF99PGeN742spfVpqbkcsdlXZOg//1JFo5DxEFjPUpeSfCVUd9DIFE2kBem7aVXBMsbOl5oC25AvwcwcA9Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T01:48:24.105426Z"},"content_sha256":"c13c3627ce3d59e80dce148ced5387fb3fec2cb18cf0ef8472baf1824ce68e80","schema_version":"1.0","event_id":"sha256:c13c3627ce3d59e80dce148ced5387fb3fec2cb18cf0ef8472baf1824ce68e80"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/K4LK7VTRSLNENJX4JEBW65OXEV/bundle.json","state_url":"https://pith.science/pith/K4LK7VTRSLNENJX4JEBW65OXEV/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/K4LK7VTRSLNENJX4JEBW65OXEV/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":"2026-08-11T01:48:24Z","links":{"resolver":"https://pith.science/pith/K4LK7VTRSLNENJX4JEBW65OXEV","bundle":"https://pith.science/pith/K4LK7VTRSLNENJX4JEBW65OXEV/bundle.json","state":"https://pith.science/pith/K4LK7VTRSLNENJX4JEBW65OXEV/state.json","well_known_bundle":"https://pith.science/.well-known/pith/K4LK7VTRSLNENJX4JEBW65OXEV/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:K4LK7VTRSLNENJX4JEBW65OXEV","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":"582d123a4131dbc32c2cd231914ee9b1a0e33c7c3692f20a58f95c05520a3461","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-06-24T15:26:04Z","title_canon_sha256":"8b90d64682c8a858112fad7f1f17432dcd04ab48566d5b788352b14011867838"},"schema_version":"1.0","source":{"id":"0906.4463","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0906.4463","created_at":"2026-07-04T17:19:31Z"},{"alias_kind":"arxiv_version","alias_value":"0906.4463v3","created_at":"2026-07-04T17:19:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0906.4463","created_at":"2026-07-04T17:19:31Z"},{"alias_kind":"pith_short_12","alias_value":"K4LK7VTRSLNE","created_at":"2026-07-04T17:19:31Z"},{"alias_kind":"pith_short_16","alias_value":"K4LK7VTRSLNENJX4","created_at":"2026-07-04T17:19:31Z"},{"alias_kind":"pith_short_8","alias_value":"K4LK7VTR","created_at":"2026-07-04T17:19:31Z"}],"graph_snapshots":[{"event_id":"sha256:c13c3627ce3d59e80dce148ced5387fb3fec2cb18cf0ef8472baf1824ce68e80","target":"graph","created_at":"2026-07-04T17:19:31Z","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/0906.4463/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We identify the optimal measurement for obtaining information about the original quantum state after the state to be measured has undergone partial decoherence due to noise. We quantify the information that can be obtained by the measurement in terms of the Fisher information and find its value for the optimal measurement. We apply our results to a quantum control scheme based on a spin-boson model.","authors_text":"Masahito Ueda, Takahiro Sagawa, Yu Watanabe","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-06-24T15:26:04Z","title":"Optimal Measurement on Noisy Quantum Systems"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0906.4463","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":"sha256:92d5b950a16b750d1aff3d02d0f8efc52b6a26247f5d6f35161da9fead0fa459","target":"record","created_at":"2026-07-04T17:19:31Z","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":"582d123a4131dbc32c2cd231914ee9b1a0e33c7c3692f20a58f95c05520a3461","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-06-24T15:26:04Z","title_canon_sha256":"8b90d64682c8a858112fad7f1f17432dcd04ab48566d5b788352b14011867838"},"schema_version":"1.0","source":{"id":"0906.4463","kind":"arxiv","version":3}},"canonical_sha256":"5716afd67192da46a6fc49036f75d7254f7d77218f4984612f423e4ca544655a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5716afd67192da46a6fc49036f75d7254f7d77218f4984612f423e4ca544655a","first_computed_at":"2026-07-04T17:19:31.055140Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:19:31.055140Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LriBgizO9jwPrqMwUojHpufxXVlvHiiM0001Oxr9cEUe5c1mvRwzvevRNyjqJOtZ7xBwCkM3WSdWojnb6vSuAA==","signature_status":"signed_v1","signed_at":"2026-07-04T17:19:31.055519Z","signed_message":"canonical_sha256_bytes"},"source_id":"0906.4463","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:92d5b950a16b750d1aff3d02d0f8efc52b6a26247f5d6f35161da9fead0fa459","sha256:c13c3627ce3d59e80dce148ced5387fb3fec2cb18cf0ef8472baf1824ce68e80"],"state_sha256":"3734896b3438da75fe296342cbee05b74477a212b6a6b6430c638444081351fd"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CmYnP9U1sk3KvnET6XIi0nqzKXWQMIhKf+YKwDIAXPj5NOR2AiF7+RqnxCQyt85xXIO2uZEUAPUWAKUQO6QSDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T01:48:24.111634Z","bundle_sha256":"c48621a481d7295b2b6e6890360b4bc17553bd8d1b0560c77899873d4589c2b1"}}