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This is achieved by restricting the analysis to operators polynomial in the canonical quadratures, leading to solutions with a geometric interpretation as orthogonal projections of the global optimum.","weakest_assumption":"Restricting the measurement and estimator search to operators that are polynomials in the canonical quadratures is sufficient to produce solutions that are either optimal or near-optimal for the original unbounded problem."}},"verdict_id":"0a26cff2-3442-43e0-b854-51c709cdf13f"}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:23dc663d18258ec4258db7007d774cd76ca8b6e691c5a687c53731c3f958e3c8","target":"record","created_at":"2026-05-20T00:03:34Z","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":"e493d35b13c4a7ea7ffb893a23645a1713352d354e7777418a37c05dc5c02ae1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2026-05-16T12:56:59Z","title_canon_sha256":"d0675d9330197971050bf9459ca23ab11387a1e05fb0c13ec951a182865bcab2"},"schema_version":"1.0","source":{"id":"2605.16978","kind":"arxiv","version":1}},"canonical_sha256":"e23e6638ee37cbc3af44751320eefe09a59f40f72ba6dbdb4c306c3732f59d0c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"e23e6638ee37cbc3af44751320eefe09a59f40f72ba6dbdb4c306c3732f59d0c","first_computed_at":"2026-05-20T00:03:34.149414Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-20T00:03:34.149414Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eofbu9RRX2x0rEIJ4HC339Kgwjab6VamPmvUyPI5WL/0MPlbyLRvp29CBt3WFQtzTSnGvRh41TpY+6eScWivBw==","signature_status":"signed_v1","signed_at":"2026-05-20T00:03:34.150167Z","signed_message":"canonical_sha256_bytes"},"source_id":"2605.16978","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:23dc663d18258ec4258db7007d774cd76ca8b6e691c5a687c53731c3f958e3c8","sha256:af5fa55c15d8728492604fa6384eae6eb10428d8ef2cfdb4574aab878a2881ae"],"state_sha256":"e6c16eaad675cb837837d72ce6c38429c0915c1141493fa97bb3439e4732bd23"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3qmB9ZctckSdahnEsk00MksVT5EWsHlFReyVB0UBHc5Q26qx+LKZ7keLju7Jxi0AUYDO16MNTkeiuWT2jNlNBQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-01T12:56:29.717161Z","bundle_sha256":"4e65c47804dc5b89d59f4cc4a42711b7f49f0fdec0a1357547bc586f24ed2a93"}}