{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:GKERAC7CJ5PCJRRHKBQMBQX77E","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":"e99a2c0562ff8201b2d2716ed40453fce2510260751d4a4f0b553ae8552f9223","cross_cats_sorted":["cs.SY","eess.SY"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-02-10T17:21:42Z","title_canon_sha256":"05cbf743d129590624ab97afd7511e0c4ba6cec57adf65760c75290927c907b8"},"schema_version":"1.0","source":{"id":"2502.06698","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.06698","created_at":"2026-07-05T11:51:21Z"},{"alias_kind":"arxiv_version","alias_value":"2502.06698v2","created_at":"2026-07-05T11:51:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.06698","created_at":"2026-07-05T11:51:21Z"},{"alias_kind":"pith_short_12","alias_value":"GKERAC7CJ5PC","created_at":"2026-07-05T11:51:21Z"},{"alias_kind":"pith_short_16","alias_value":"GKERAC7CJ5PCJRRH","created_at":"2026-07-05T11:51:21Z"},{"alias_kind":"pith_short_8","alias_value":"GKERAC7C","created_at":"2026-07-05T11:51:21Z"}],"graph_snapshots":[{"event_id":"sha256:b512bf0136f003762dea326d00ac429f0f68e72490a1a05d2121fe3ac4e92310","target":"graph","created_at":"2026-07-05T11:51:21Z","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/2502.06698/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The calibration of high-quality two-qubit entangling gates is an essential component in engineering large-scale, fault-tolerant quantum computers. However, many standard calibration techniques are based on randomized circuits that are only quadratically sensitive to calibration errors. As a result, these approaches are inefficient, requiring many experimental shots to achieve acceptable performance. In this work, we demonstrate that robust phase estimation can enable high-precision, Heisenberg-limited estimates of coherent errors in multi-qubit gates. Equipped with an efficient estimator, the ","authors_text":"Akel Hashim, David I. Santiago, Irfan Siddiqi, J. P. Marceaux, Kenneth Rudinger, Kevin C. Young","cross_cats":["cs.SY","eess.SY"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-02-10T17:21:42Z","title":"Heisenberg-limited calibration of entangling gates with robust phase estimation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.06698","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:afe222503b59913aeff05ce042e0ff790c2a3c3023873682b14d38a498dbac82","target":"record","created_at":"2026-07-05T11:51:21Z","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":"e99a2c0562ff8201b2d2716ed40453fce2510260751d4a4f0b553ae8552f9223","cross_cats_sorted":["cs.SY","eess.SY"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2025-02-10T17:21:42Z","title_canon_sha256":"05cbf743d129590624ab97afd7511e0c4ba6cec57adf65760c75290927c907b8"},"schema_version":"1.0","source":{"id":"2502.06698","kind":"arxiv","version":2}},"canonical_sha256":"3289100be24f5e24c6275060c0c2fff933d9272f8917f7921c4d557ab21c7d60","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3289100be24f5e24c6275060c0c2fff933d9272f8917f7921c4d557ab21c7d60","first_computed_at":"2026-07-05T11:51:21.849869Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:51:21.849869Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"rv34kMCYUGcqtE8FpS+jgWA2F20QEVFlBc/41AISgYEs2mRua09oLXLKykrFcdAuO4thwlcvayqag9HOne0wDw==","signature_status":"signed_v1","signed_at":"2026-07-05T11:51:21.850366Z","signed_message":"canonical_sha256_bytes"},"source_id":"2502.06698","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:afe222503b59913aeff05ce042e0ff790c2a3c3023873682b14d38a498dbac82","sha256:b512bf0136f003762dea326d00ac429f0f68e72490a1a05d2121fe3ac4e92310"],"state_sha256":"f6c6d350862246c77182d3e049560810a323b9a0085fcff81c85ff57b020caec"}