{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2015:EYKOANISAXXJMHD4QHDIBN7UAM","short_pith_number":"pith:EYKOANIS","canonical_record":{"source":{"id":"1505.04539","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-05-18T07:54:02Z","cross_cats_sorted":[],"title_canon_sha256":"54a78589b501837f4fa04393ce6202a8717c52c7e1215482746fe85a066f6d32","abstract_canon_sha256":"1f315d326fa9d517d3cafb23db3fe818e54f35548128e9bd71286e6b38b36947"},"schema_version":"1.0"},"canonical_sha256":"2614e0351205ee961c7c81c680b7f4033ebae90de4cd8009c7f016e4f918269d","source":{"kind":"arxiv","id":"1505.04539","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.04539","created_at":"2026-05-18T00:42:39Z"},{"alias_kind":"arxiv_version","alias_value":"1505.04539v2","created_at":"2026-05-18T00:42:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.04539","created_at":"2026-05-18T00:42:39Z"},{"alias_kind":"pith_short_12","alias_value":"EYKOANISAXXJ","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"EYKOANISAXXJMHD4","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"EYKOANIS","created_at":"2026-05-18T12:29:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2015:EYKOANISAXXJMHD4QHDIBN7UAM","target":"record","payload":{"canonical_record":{"source":{"id":"1505.04539","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-05-18T07:54:02Z","cross_cats_sorted":[],"title_canon_sha256":"54a78589b501837f4fa04393ce6202a8717c52c7e1215482746fe85a066f6d32","abstract_canon_sha256":"1f315d326fa9d517d3cafb23db3fe818e54f35548128e9bd71286e6b38b36947"},"schema_version":"1.0"},"canonical_sha256":"2614e0351205ee961c7c81c680b7f4033ebae90de4cd8009c7f016e4f918269d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:42:39.791645Z","signature_b64":"mMNZ+uBsXUX2tn74hXDu7q5nk1LzET1Fj15sVVk8+a9yHDikxrJ1Sf99gBedJEEeIwjmojFo6YQOPMwOUeGTCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2614e0351205ee961c7c81c680b7f4033ebae90de4cd8009c7f016e4f918269d","last_reissued_at":"2026-05-18T00:42:39.790946Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:42:39.790946Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1505.04539","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:42:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0/CMYu0+QUUFF2X/OGtHWYp6eL/kmMtEB+t/D1yR7RjBzC+nH9vv64eey8lLdxcmLAxriAXnKYC046ZBN+Z4Ag==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T20:06:40.404093Z"},"content_sha256":"a2956cf1988dd3f709867b9ae7fd80998b8ca202ade2575ee74a486d7d1e9570","schema_version":"1.0","event_id":"sha256:a2956cf1988dd3f709867b9ae7fd80998b8ca202ade2575ee74a486d7d1e9570"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2015:EYKOANISAXXJMHD4QHDIBN7UAM","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Entanglement-assisted quantum feedback control","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Naoki Yamamoto, Tomoaki Mikami","submitted_at":"2015-05-18T07:54:02Z","abstract_excerpt":"The main advantage of quantum metrology relies on the effective use of entanglement, which indeed allows us to achieve strictly better estimation performance over the standard quantum limit. In this paper, we propose an analogous method uti- lizing entanglement for the purpose of feedback control. The system considered is a general linear dynamical quantum system, where the control goal can be systemati- cally formulated as a linear quadratic Gaussian control problem based on the quantum Kalman filtering method; in this setting, an entangled input probe field is effectively used to reduce the "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.04539","kind":"arxiv","version":2},"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":"2026-05-18T00:42:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"XRWuCvCBovbxtmlLrE+5nsSFDftFHrGbCPH+67/mDVcEDIwiX2yaQjHSwcxChG8+t/dqD5LLmvPf6uDjVnefAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-18T20:06:40.404758Z"},"content_sha256":"bda2129d24509f951b8b5674fe3e40ba46ebbbf1d80e525786d60993d91b7526","schema_version":"1.0","event_id":"sha256:bda2129d24509f951b8b5674fe3e40ba46ebbbf1d80e525786d60993d91b7526"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EYKOANISAXXJMHD4QHDIBN7UAM/bundle.json","state_url":"https://pith.science/pith/EYKOANISAXXJMHD4QHDIBN7UAM/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EYKOANISAXXJMHD4QHDIBN7UAM/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":"2026-05-18T20:06:40Z","links":{"resolver":"https://pith.science/pith/EYKOANISAXXJMHD4QHDIBN7UAM","bundle":"https://pith.science/pith/EYKOANISAXXJMHD4QHDIBN7UAM/bundle.json","state":"https://pith.science/pith/EYKOANISAXXJMHD4QHDIBN7UAM/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EYKOANISAXXJMHD4QHDIBN7UAM/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2015:EYKOANISAXXJMHD4QHDIBN7UAM","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":"1f315d326fa9d517d3cafb23db3fe818e54f35548128e9bd71286e6b38b36947","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-05-18T07:54:02Z","title_canon_sha256":"54a78589b501837f4fa04393ce6202a8717c52c7e1215482746fe85a066f6d32"},"schema_version":"1.0","source":{"id":"1505.04539","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1505.04539","created_at":"2026-05-18T00:42:39Z"},{"alias_kind":"arxiv_version","alias_value":"1505.04539v2","created_at":"2026-05-18T00:42:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1505.04539","created_at":"2026-05-18T00:42:39Z"},{"alias_kind":"pith_short_12","alias_value":"EYKOANISAXXJ","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_16","alias_value":"EYKOANISAXXJMHD4","created_at":"2026-05-18T12:29:19Z"},{"alias_kind":"pith_short_8","alias_value":"EYKOANIS","created_at":"2026-05-18T12:29:19Z"}],"graph_snapshots":[{"event_id":"sha256:bda2129d24509f951b8b5674fe3e40ba46ebbbf1d80e525786d60993d91b7526","target":"graph","created_at":"2026-05-18T00:42:39Z","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 main advantage of quantum metrology relies on the effective use of entanglement, which indeed allows us to achieve strictly better estimation performance over the standard quantum limit. In this paper, we propose an analogous method uti- lizing entanglement for the purpose of feedback control. The system considered is a general linear dynamical quantum system, where the control goal can be systemati- cally formulated as a linear quadratic Gaussian control problem based on the quantum Kalman filtering method; in this setting, an entangled input probe field is effectively used to reduce the ","authors_text":"Naoki Yamamoto, Tomoaki Mikami","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-05-18T07:54:02Z","title":"Entanglement-assisted quantum feedback control"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.04539","kind":"arxiv","version":2},"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:a2956cf1988dd3f709867b9ae7fd80998b8ca202ade2575ee74a486d7d1e9570","target":"record","created_at":"2026-05-18T00:42:39Z","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":"1f315d326fa9d517d3cafb23db3fe818e54f35548128e9bd71286e6b38b36947","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-05-18T07:54:02Z","title_canon_sha256":"54a78589b501837f4fa04393ce6202a8717c52c7e1215482746fe85a066f6d32"},"schema_version":"1.0","source":{"id":"1505.04539","kind":"arxiv","version":2}},"canonical_sha256":"2614e0351205ee961c7c81c680b7f4033ebae90de4cd8009c7f016e4f918269d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2614e0351205ee961c7c81c680b7f4033ebae90de4cd8009c7f016e4f918269d","first_computed_at":"2026-05-18T00:42:39.790946Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:42:39.790946Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mMNZ+uBsXUX2tn74hXDu7q5nk1LzET1Fj15sVVk8+a9yHDikxrJ1Sf99gBedJEEeIwjmojFo6YQOPMwOUeGTCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:42:39.791645Z","signed_message":"canonical_sha256_bytes"},"source_id":"1505.04539","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a2956cf1988dd3f709867b9ae7fd80998b8ca202ade2575ee74a486d7d1e9570","sha256:bda2129d24509f951b8b5674fe3e40ba46ebbbf1d80e525786d60993d91b7526"],"state_sha256":"8b2bb257b7660bdf2929ef74b3aa5f5e410ba7a269824823c6923082401271c5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZcSxMJRaC0hGSzj2hZ0XSyVRNjIlECY/ndFRcoPykWYVdkXUg+1Pisjp6Rq5feef+++2aqKulwSh1Pk8Ltv1Dw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-18T20:06:40.406796Z","bundle_sha256":"333c6926178e5154d556efdd463d631ebb85c3516414ea1166897d478b1d5ada"}}