{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:F2RHZBQKPKDGOUUMLKTMPGZS22","short_pith_number":"pith:F2RHZBQK","canonical_record":{"source":{"id":"1209.5736","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-09-25T19:43:17Z","cross_cats_sorted":[],"title_canon_sha256":"38c6d42d2dc2d55a6c9ca6fda96d5134634466b5ff331b2b45cad2240b3c29e6","abstract_canon_sha256":"3f5fabd46746b64d542e414e6ee2c08cb00cfe70d612dad99eae505eaa8253dc"},"schema_version":"1.0"},"canonical_sha256":"2ea27c860a7a8667528c5aa6c79b32d6bfbaa8375adfc38dfb9af26499516c2e","source":{"kind":"arxiv","id":"1209.5736","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.5736","created_at":"2026-05-18T03:22:17Z"},{"alias_kind":"arxiv_version","alias_value":"1209.5736v2","created_at":"2026-05-18T03:22:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.5736","created_at":"2026-05-18T03:22:17Z"},{"alias_kind":"pith_short_12","alias_value":"F2RHZBQKPKDG","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_16","alias_value":"F2RHZBQKPKDGOUUM","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_8","alias_value":"F2RHZBQK","created_at":"2026-05-18T12:27:04Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:F2RHZBQKPKDGOUUMLKTMPGZS22","target":"record","payload":{"canonical_record":{"source":{"id":"1209.5736","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-09-25T19:43:17Z","cross_cats_sorted":[],"title_canon_sha256":"38c6d42d2dc2d55a6c9ca6fda96d5134634466b5ff331b2b45cad2240b3c29e6","abstract_canon_sha256":"3f5fabd46746b64d542e414e6ee2c08cb00cfe70d612dad99eae505eaa8253dc"},"schema_version":"1.0"},"canonical_sha256":"2ea27c860a7a8667528c5aa6c79b32d6bfbaa8375adfc38dfb9af26499516c2e","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T03:22:17.365243Z","signature_b64":"AKDiBrmtq99MMlRutHiVtGu3wqc0ujMI/TWZ4ouv7QfC4JOAAvJtGgqhS+wdw9N8x1AfXK+zK5x+pwNfgtJxDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2ea27c860a7a8667528c5aa6c79b32d6bfbaa8375adfc38dfb9af26499516c2e","last_reissued_at":"2026-05-18T03:22:17.364489Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T03:22:17.364489Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1209.5736","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":"2026-05-18T03:22:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"7lZpEeNGvxMiUxYIFvhAfK4H9GG2YcZ4blBdykpMaRUZyRqV7JYPCzXJjX0RPskzwrleJKCFU5Wg/tZpDIAmCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T23:24:55.208449Z"},"content_sha256":"2a86b9058c1a1fd0458ed45a51e834a8faf3f78c4ecd5fb69889fce9c1f297d6","schema_version":"1.0","event_id":"sha256:2a86b9058c1a1fd0458ed45a51e834a8faf3f78c4ecd5fb69889fce9c1f297d6"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:F2RHZBQKPKDGOUUMLKTMPGZS22","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Quantum Metrology Assisted with Abstention","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"B. Gendra, E. Bagan, E. Ronco-Bonvehi, J. Calsamiglia, R. Munoz-Tapia","submitted_at":"2012-09-25T19:43:17Z","abstract_excerpt":"The main goal of quantum metrology is to obtain accurate values of physical parameters using quantum probes. In this context, we show that abstention, i.e., the possibility of getting an inconclusive answer at readout, can drastically improve the measurement precision. We focus on phase estimation and quantify the required amount of abstention for a given precision. We also develop analytical tools to obtain the asymptotic behavior of the precision and required rate of abstention for arbitrary pure qubit states."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.5736","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":"2026-05-18T03:22:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"aL6a+gwRHSRyhLXnlyH7cCUNf80KlGSAtTQFaMatoJcBZ3/DdhMaFjcc1yiqeBIaIOexVvuiPDz8OXivaEtDDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T23:24:55.209139Z"},"content_sha256":"dcbc8e45784e5465045a35f481e3ab1e04f318d8263a711c4b559b4f0e6335fa","schema_version":"1.0","event_id":"sha256:dcbc8e45784e5465045a35f481e3ab1e04f318d8263a711c4b559b4f0e6335fa"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/F2RHZBQKPKDGOUUMLKTMPGZS22/bundle.json","state_url":"https://pith.science/pith/F2RHZBQKPKDGOUUMLKTMPGZS22/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/F2RHZBQKPKDGOUUMLKTMPGZS22/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":"2026-05-19T23:24:55Z","links":{"resolver":"https://pith.science/pith/F2RHZBQKPKDGOUUMLKTMPGZS22","bundle":"https://pith.science/pith/F2RHZBQKPKDGOUUMLKTMPGZS22/bundle.json","state":"https://pith.science/pith/F2RHZBQKPKDGOUUMLKTMPGZS22/state.json","well_known_bundle":"https://pith.science/.well-known/pith/F2RHZBQKPKDGOUUMLKTMPGZS22/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:F2RHZBQKPKDGOUUMLKTMPGZS22","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":"3f5fabd46746b64d542e414e6ee2c08cb00cfe70d612dad99eae505eaa8253dc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-09-25T19:43:17Z","title_canon_sha256":"38c6d42d2dc2d55a6c9ca6fda96d5134634466b5ff331b2b45cad2240b3c29e6"},"schema_version":"1.0","source":{"id":"1209.5736","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1209.5736","created_at":"2026-05-18T03:22:17Z"},{"alias_kind":"arxiv_version","alias_value":"1209.5736v2","created_at":"2026-05-18T03:22:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1209.5736","created_at":"2026-05-18T03:22:17Z"},{"alias_kind":"pith_short_12","alias_value":"F2RHZBQKPKDG","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_16","alias_value":"F2RHZBQKPKDGOUUM","created_at":"2026-05-18T12:27:04Z"},{"alias_kind":"pith_short_8","alias_value":"F2RHZBQK","created_at":"2026-05-18T12:27:04Z"}],"graph_snapshots":[{"event_id":"sha256:dcbc8e45784e5465045a35f481e3ab1e04f318d8263a711c4b559b4f0e6335fa","target":"graph","created_at":"2026-05-18T03:22:17Z","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 goal of quantum metrology is to obtain accurate values of physical parameters using quantum probes. In this context, we show that abstention, i.e., the possibility of getting an inconclusive answer at readout, can drastically improve the measurement precision. We focus on phase estimation and quantify the required amount of abstention for a given precision. We also develop analytical tools to obtain the asymptotic behavior of the precision and required rate of abstention for arbitrary pure qubit states.","authors_text":"B. Gendra, E. Bagan, E. Ronco-Bonvehi, J. Calsamiglia, R. Munoz-Tapia","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-09-25T19:43:17Z","title":"Quantum Metrology Assisted with Abstention"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1209.5736","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":"sha256:2a86b9058c1a1fd0458ed45a51e834a8faf3f78c4ecd5fb69889fce9c1f297d6","target":"record","created_at":"2026-05-18T03:22:17Z","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":"3f5fabd46746b64d542e414e6ee2c08cb00cfe70d612dad99eae505eaa8253dc","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2012-09-25T19:43:17Z","title_canon_sha256":"38c6d42d2dc2d55a6c9ca6fda96d5134634466b5ff331b2b45cad2240b3c29e6"},"schema_version":"1.0","source":{"id":"1209.5736","kind":"arxiv","version":2}},"canonical_sha256":"2ea27c860a7a8667528c5aa6c79b32d6bfbaa8375adfc38dfb9af26499516c2e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2ea27c860a7a8667528c5aa6c79b32d6bfbaa8375adfc38dfb9af26499516c2e","first_computed_at":"2026-05-18T03:22:17.364489Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T03:22:17.364489Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"AKDiBrmtq99MMlRutHiVtGu3wqc0ujMI/TWZ4ouv7QfC4JOAAvJtGgqhS+wdw9N8x1AfXK+zK5x+pwNfgtJxDw==","signature_status":"signed_v1","signed_at":"2026-05-18T03:22:17.365243Z","signed_message":"canonical_sha256_bytes"},"source_id":"1209.5736","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2a86b9058c1a1fd0458ed45a51e834a8faf3f78c4ecd5fb69889fce9c1f297d6","sha256:dcbc8e45784e5465045a35f481e3ab1e04f318d8263a711c4b559b4f0e6335fa"],"state_sha256":"d27fb56e9d40abe75d97d94c578264e326fe157a3b57aaa356febe770576b392"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cNvYtaOjmEj5hxfKtwbXqRaRwzcvtgc2ZjMN35v279moHeBqCzT932DIMe9zbtNp98xUGtceaITBgct6LFk5AQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-19T23:24:55.212914Z","bundle_sha256":"0fe299c7462820a4a439db1dc8728098e4b987d1357a054d0d9ae7639e803dca"}}