{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:KVHD2VIXLHW32EIOY4VP3FMGIQ","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":"47ef4d50ce6203f32a73d2c41b3d0e8529d837c55de66d4e7c50cc59a87b4b81","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-04-23T11:12:11Z","title_canon_sha256":"82d14997c22cb4201cf36ddba8cb372d9cc5932c6d86790ee2b4ca0b85f0d8a4"},"schema_version":"1.0","source":{"id":"1904.10246","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1904.10246","created_at":"2026-07-05T00:35:43Z"},{"alias_kind":"arxiv_version","alias_value":"1904.10246v2","created_at":"2026-07-05T00:35:43Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1904.10246","created_at":"2026-07-05T00:35:43Z"},{"alias_kind":"pith_short_12","alias_value":"KVHD2VIXLHW3","created_at":"2026-07-05T00:35:43Z"},{"alias_kind":"pith_short_16","alias_value":"KVHD2VIXLHW32EIO","created_at":"2026-07-05T00:35:43Z"},{"alias_kind":"pith_short_8","alias_value":"KVHD2VIX","created_at":"2026-07-05T00:35:43Z"}],"graph_snapshots":[{"event_id":"sha256:a47ed3c1f0d5c86613094bb5e92b3b7f5f3d326d972870c8bb0a352c8e7cf597","target":"graph","created_at":"2026-07-05T00:35:43Z","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/1904.10246/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"This paper focuses on the quantum amplitude estimation algorithm, which is a core subroutine in quantum computation for various applications. The conventional approach for amplitude estimation is to use the phase estimation algorithm, which consists of many controlled amplification operations followed by a quantum Fourier transform. However, the whole procedure is hard to implement with current and near-term quantum computers. In this paper, we propose a quantum amplitude estimation algorithm without the use of expensive controlled operations; the key idea is to utilize the maximum likelihood ","authors_text":"Naoki Yamamoto, Rudy Raymond, Shumpei Uno, Tamiya Onodera, Tomoki Tanaka, Yohichi Suzuki","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-04-23T11:12:11Z","title":"Amplitude estimation without phase estimation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.10246","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":"sha256:535a7210b9ce8093bb036eacabb9b9d0def5415f6c8d38b83091bfd0d6a9d008","target":"record","created_at":"2026-07-05T00:35:43Z","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":"47ef4d50ce6203f32a73d2c41b3d0e8529d837c55de66d4e7c50cc59a87b4b81","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2019-04-23T11:12:11Z","title_canon_sha256":"82d14997c22cb4201cf36ddba8cb372d9cc5932c6d86790ee2b4ca0b85f0d8a4"},"schema_version":"1.0","source":{"id":"1904.10246","kind":"arxiv","version":2}},"canonical_sha256":"554e3d551759edbd110ec72afd95864431e5cf61d374d79c8089e8ee84c11b26","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"554e3d551759edbd110ec72afd95864431e5cf61d374d79c8089e8ee84c11b26","first_computed_at":"2026-07-05T00:35:43.640211Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:35:43.640211Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"ny33bq2Dje+QFz9jJozCWEyqyaOMoxRVYYr4Wk/rR+98LEU/fCQcaJeSw+kLyuupkDTenBPlKjJvP7D6dkyYBQ==","signature_status":"signed_v1","signed_at":"2026-07-05T00:35:43.640725Z","signed_message":"canonical_sha256_bytes"},"source_id":"1904.10246","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:535a7210b9ce8093bb036eacabb9b9d0def5415f6c8d38b83091bfd0d6a9d008","sha256:a47ed3c1f0d5c86613094bb5e92b3b7f5f3d326d972870c8bb0a352c8e7cf597"],"state_sha256":"48286b3f0a1cbf5ef96d138864b9338ba56f6b9a92b89d76926235ccf6852f0e"}