{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2009:BXWG344LAB55YBIS7G5CDXO4SS","short_pith_number":"pith:BXWG344L","canonical_record":{"source":{"id":"0908.0198","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-08-03T07:34:18Z","cross_cats_sorted":["math.OC"],"title_canon_sha256":"5a70c0bb3cffae66b6621d971e15d35039a7b776a17e9a9bb23ea638734eeea5","abstract_canon_sha256":"f3f5e210c4d2f3bac8ad815436937f715afc770e7df91464f6a46680d7b5674d"},"schema_version":"1.0"},"canonical_sha256":"0dec6df38b007bdc0512f9ba21dddc949e4eb3b9de85314519aff291b405f158","source":{"kind":"arxiv","id":"0908.0198","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0908.0198","created_at":"2026-07-04T17:24:01Z"},{"alias_kind":"arxiv_version","alias_value":"0908.0198v2","created_at":"2026-07-04T17:24:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0908.0198","created_at":"2026-07-04T17:24:01Z"},{"alias_kind":"pith_short_12","alias_value":"BXWG344LAB55","created_at":"2026-07-04T17:24:01Z"},{"alias_kind":"pith_short_16","alias_value":"BXWG344LAB55YBIS","created_at":"2026-07-04T17:24:01Z"},{"alias_kind":"pith_short_8","alias_value":"BXWG344L","created_at":"2026-07-04T17:24:01Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2009:BXWG344LAB55YBIS7G5CDXO4SS","target":"record","payload":{"canonical_record":{"source":{"id":"0908.0198","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-08-03T07:34:18Z","cross_cats_sorted":["math.OC"],"title_canon_sha256":"5a70c0bb3cffae66b6621d971e15d35039a7b776a17e9a9bb23ea638734eeea5","abstract_canon_sha256":"f3f5e210c4d2f3bac8ad815436937f715afc770e7df91464f6a46680d7b5674d"},"schema_version":"1.0"},"canonical_sha256":"0dec6df38b007bdc0512f9ba21dddc949e4eb3b9de85314519aff291b405f158","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T17:24:01.994161Z","signature_b64":"0DQEoBDtqwOIEu7BV+pmW7+OFaDK3t/5tAJKfinFAeSbp+vD/oSDM32uEmgz3x54nnBRZOqU4bPtOUrXWbUkAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0dec6df38b007bdc0512f9ba21dddc949e4eb3b9de85314519aff291b405f158","last_reissued_at":"2026-07-04T17:24:01.993759Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T17:24:01.993759Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"0908.0198","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":"2026-07-04T17:24:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"anvbeazt7b7c9P1rzHo7gWvPF+ecN8dwcAAeaWv7bpdcm0qRm00h6pibFUfEVEIxcrgqqolrxNPqRjUOYG6zDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T21:08:18.584741Z"},"content_sha256":"7358e799fd97d028794e1750dc6f645959099f5d3e8e31980d87816b99b6fc97","schema_version":"1.0","event_id":"sha256:7358e799fd97d028794e1750dc6f645959099f5d3e8e31980d87816b99b6fc97"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2009:BXWG344LAB55YBIS7G5CDXO4SS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Replacing Quantum Feedback with Open-Loop Control and Quantum Filtering","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["math.OC"],"primary_cat":"quant-ph","authors_text":"A. J. Scott, Howard M. Wiseman, Joshua Combes","submitted_at":"2009-08-03T07:34:18Z","abstract_excerpt":"Feedback control protocols can stabilize and enhance the operation of quantum devices, however, unavoidable delays in the feedback loop adversely affect their performance. We introduce a quantum control methodology, combining open-loop control with quantum filtering, which is not constrained by feedback delays. For the problems studied (rapid purification and rapid measurement) we analytically derive lower bounds on the control performance that are comparable with the best corresponding bounds for feedback protocols."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0908.0198","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/0908.0198/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":"2026-07-04T17:24:01Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"NAuZFLg+NTb+jOxvIuW+/zTaTeaXD5RBh5cHHJlt7gu/+pNC3vVcRbiJQlJo6bxkMKzz+D5zZ+i0wo8ZSqcEAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-10T21:08:18.585658Z"},"content_sha256":"c21282634595502776cbe9d6c63289b603b097e89c7d6f07c377a7267fbd712c","schema_version":"1.0","event_id":"sha256:c21282634595502776cbe9d6c63289b603b097e89c7d6f07c377a7267fbd712c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BXWG344LAB55YBIS7G5CDXO4SS/bundle.json","state_url":"https://pith.science/pith/BXWG344LAB55YBIS7G5CDXO4SS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BXWG344LAB55YBIS7G5CDXO4SS/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":"2026-08-10T21:08:18Z","links":{"resolver":"https://pith.science/pith/BXWG344LAB55YBIS7G5CDXO4SS","bundle":"https://pith.science/pith/BXWG344LAB55YBIS7G5CDXO4SS/bundle.json","state":"https://pith.science/pith/BXWG344LAB55YBIS7G5CDXO4SS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BXWG344LAB55YBIS7G5CDXO4SS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2009:BXWG344LAB55YBIS7G5CDXO4SS","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":"f3f5e210c4d2f3bac8ad815436937f715afc770e7df91464f6a46680d7b5674d","cross_cats_sorted":["math.OC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-08-03T07:34:18Z","title_canon_sha256":"5a70c0bb3cffae66b6621d971e15d35039a7b776a17e9a9bb23ea638734eeea5"},"schema_version":"1.0","source":{"id":"0908.0198","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"0908.0198","created_at":"2026-07-04T17:24:01Z"},{"alias_kind":"arxiv_version","alias_value":"0908.0198v2","created_at":"2026-07-04T17:24:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0908.0198","created_at":"2026-07-04T17:24:01Z"},{"alias_kind":"pith_short_12","alias_value":"BXWG344LAB55","created_at":"2026-07-04T17:24:01Z"},{"alias_kind":"pith_short_16","alias_value":"BXWG344LAB55YBIS","created_at":"2026-07-04T17:24:01Z"},{"alias_kind":"pith_short_8","alias_value":"BXWG344L","created_at":"2026-07-04T17:24:01Z"}],"graph_snapshots":[{"event_id":"sha256:c21282634595502776cbe9d6c63289b603b097e89c7d6f07c377a7267fbd712c","target":"graph","created_at":"2026-07-04T17:24:01Z","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/0908.0198/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Feedback control protocols can stabilize and enhance the operation of quantum devices, however, unavoidable delays in the feedback loop adversely affect their performance. We introduce a quantum control methodology, combining open-loop control with quantum filtering, which is not constrained by feedback delays. For the problems studied (rapid purification and rapid measurement) we analytically derive lower bounds on the control performance that are comparable with the best corresponding bounds for feedback protocols.","authors_text":"A. J. Scott, Howard M. Wiseman, Joshua Combes","cross_cats":["math.OC"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-08-03T07:34:18Z","title":"Replacing Quantum Feedback with Open-Loop Control and Quantum Filtering"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0908.0198","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":"sha256:7358e799fd97d028794e1750dc6f645959099f5d3e8e31980d87816b99b6fc97","target":"record","created_at":"2026-07-04T17:24:01Z","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":"f3f5e210c4d2f3bac8ad815436937f715afc770e7df91464f6a46680d7b5674d","cross_cats_sorted":["math.OC"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-08-03T07:34:18Z","title_canon_sha256":"5a70c0bb3cffae66b6621d971e15d35039a7b776a17e9a9bb23ea638734eeea5"},"schema_version":"1.0","source":{"id":"0908.0198","kind":"arxiv","version":2}},"canonical_sha256":"0dec6df38b007bdc0512f9ba21dddc949e4eb3b9de85314519aff291b405f158","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0dec6df38b007bdc0512f9ba21dddc949e4eb3b9de85314519aff291b405f158","first_computed_at":"2026-07-04T17:24:01.993759Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T17:24:01.993759Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"0DQEoBDtqwOIEu7BV+pmW7+OFaDK3t/5tAJKfinFAeSbp+vD/oSDM32uEmgz3x54nnBRZOqU4bPtOUrXWbUkAg==","signature_status":"signed_v1","signed_at":"2026-07-04T17:24:01.994161Z","signed_message":"canonical_sha256_bytes"},"source_id":"0908.0198","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:7358e799fd97d028794e1750dc6f645959099f5d3e8e31980d87816b99b6fc97","sha256:c21282634595502776cbe9d6c63289b603b097e89c7d6f07c377a7267fbd712c"],"state_sha256":"69592579112b5cc052af5c334fbc38a760a35fdf0444f573a93e9f0ee2efe49a"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Do0fahvt/7Irq3IL7iVobMHipZ2aSCtLFyS1vyD0GC6btmuo7UN5xNpJtDNJmkwJqCpjqpKl0GST4fUWHJ7sCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-10T21:08:18.591507Z","bundle_sha256":"9ebce7a0aa1e3ce7b72d40dcacd20c8c518f2a42021cca93dcd4817e5870f0f2"}}