{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:GEZXSRVTXEPALKC57I4RNADCWV","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":"b7086ee7b8f288d987865de889072c5c017cab58cb71a3d8358a0a47fc5d0c0f","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-02-26T18:38:01Z","title_canon_sha256":"4a787ce6ab0d46d7958674431a155ddc86804fbde869249ee7c1db564a451122"},"schema_version":"1.0","source":{"id":"2602.23332","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2602.23332","created_at":"2026-06-29T01:15:04Z"},{"alias_kind":"arxiv_version","alias_value":"2602.23332v2","created_at":"2026-06-29T01:15:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2602.23332","created_at":"2026-06-29T01:15:04Z"},{"alias_kind":"pith_short_12","alias_value":"GEZXSRVTXEPA","created_at":"2026-06-29T01:15:04Z"},{"alias_kind":"pith_short_16","alias_value":"GEZXSRVTXEPALKC5","created_at":"2026-06-29T01:15:04Z"},{"alias_kind":"pith_short_8","alias_value":"GEZXSRVT","created_at":"2026-06-29T01:15:04Z"}],"graph_snapshots":[{"event_id":"sha256:fd5276914f127fc8eafa61b8ff99cfc0947eb026a2dd286f2174243f13822ef8","target":"graph","created_at":"2026-06-29T01:15:04Z","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/2602.23332/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The extreme sensitivity of chaotic systems to external perturbations makes them natural candidates for sensing applications. We propose a single-shot echo-based protocol for estimating small rotations about an unknown axis that leverages random symmetric probe states prepared via chaotic dynamics. In contrast to previous protocols for this axis-agnostic rotation sensing problem that depend on difficult-to-prepare anticoherent states, the random probe states used in our protocol can be prepared via constant-depth chaotic circuits composed of random one-axis twisting pulses. Further, the signal ","authors_text":"Alexey V. Gorshkov, Gregory Bentsen, Jacob Bringewatt, Jasmine Albert, Leon Zaporski, Matthew Radzihovsky, Vladan Vuletic","cross_cats":[],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-02-26T18:38:01Z","title":"Butterfly Echo Protocol for Axis-Agnostic Heisenberg-Limited Metrology"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2602.23332","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":"sha256:1d94fa68516b4f22bfd534663056339a9852f831fb85aef186c212db4cd3de57","target":"record","created_at":"2026-06-29T01:15:04Z","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":"b7086ee7b8f288d987865de889072c5c017cab58cb71a3d8358a0a47fc5d0c0f","cross_cats_sorted":[],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"quant-ph","submitted_at":"2026-02-26T18:38:01Z","title_canon_sha256":"4a787ce6ab0d46d7958674431a155ddc86804fbde869249ee7c1db564a451122"},"schema_version":"1.0","source":{"id":"2602.23332","kind":"arxiv","version":2}},"canonical_sha256":"31337946b3b91e05a85dfa39168062b57b1e13a6f8eff7ac83bd8c1508dc24b3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"31337946b3b91e05a85dfa39168062b57b1e13a6f8eff7ac83bd8c1508dc24b3","first_computed_at":"2026-06-29T01:15:04.233689Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-29T01:15:04.233689Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"VhBV7wFhQLVZfk0wh89OLk2ndD+unX6nucsxtSos4HUGcW2T0WPS+2Jh1Iu2225A3sJR/h6zyBYtplHOftskBA==","signature_status":"signed_v1","signed_at":"2026-06-29T01:15:04.234143Z","signed_message":"canonical_sha256_bytes"},"source_id":"2602.23332","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1d94fa68516b4f22bfd534663056339a9852f831fb85aef186c212db4cd3de57","sha256:fd5276914f127fc8eafa61b8ff99cfc0947eb026a2dd286f2174243f13822ef8"],"state_sha256":"98503b0d9155fa0056e16944e86889b2119d5a6a8d390274da1831e7e9acdea3"}