{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:UEYAX33E55A7W2F5MY3PTTUGNR","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":"00878ee8958da5c6de43e246cd5001aae828f500e0d53ff12e6c131a47c7e8c7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-06-23T12:55:36Z","title_canon_sha256":"1780429d420f976466c0b1b3ed734a937843b7575aecfd13056e5afd69b918ae"},"schema_version":"1.0","source":{"id":"1606.07299","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1606.07299","created_at":"2026-05-18T01:07:15Z"},{"alias_kind":"arxiv_version","alias_value":"1606.07299v1","created_at":"2026-05-18T01:07:15Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1606.07299","created_at":"2026-05-18T01:07:15Z"},{"alias_kind":"pith_short_12","alias_value":"UEYAX33E55A7","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_16","alias_value":"UEYAX33E55A7W2F5","created_at":"2026-05-18T12:30:46Z"},{"alias_kind":"pith_short_8","alias_value":"UEYAX33E","created_at":"2026-05-18T12:30:46Z"}],"graph_snapshots":[{"event_id":"sha256:129bd33050c61fbe45cb8284ef907f7f011198890612cc1fca78d67783281015","target":"graph","created_at":"2026-05-18T01:07:15Z","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":"We propose force sensing protocols using linear ion chain which can operate beyond the quantum standard limit. We show that oscillating forces that are off-resonance with the motional trap frequency can be detected very efficiently by using quantum probes represented by various spin-boson models. We demonstrate that the temporal evolution of a quantum probe described by the Dicke model can be mapped on the nonlinear Ramsey interferometry which allows to detect far-detuned forces simply by measuring the collective spin populations. Moreover, we show that the measurement uncertainty can reach th","authors_text":"Peter A. Ivanov","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-06-23T12:55:36Z","title":"Force sensors with precision beyond the standard quantum limit"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1606.07299","kind":"arxiv","version":1},"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":"sha256:460ddd1b920ac8e62482f263e0d4120b9b2260e7a348ea28fccd2715c5d44bfb","target":"record","created_at":"2026-05-18T01:07:15Z","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":"00878ee8958da5c6de43e246cd5001aae828f500e0d53ff12e6c131a47c7e8c7","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-06-23T12:55:36Z","title_canon_sha256":"1780429d420f976466c0b1b3ed734a937843b7575aecfd13056e5afd69b918ae"},"schema_version":"1.0","source":{"id":"1606.07299","kind":"arxiv","version":1}},"canonical_sha256":"a1300bef64ef41fb68bd6636f9ce866c4865c6b6cae654aecab2ad250ad05963","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a1300bef64ef41fb68bd6636f9ce866c4865c6b6cae654aecab2ad250ad05963","first_computed_at":"2026-05-18T01:07:15.973676Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:07:15.973676Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"aNe6aSE/WVQFYAEkjuh+S34fWA1prcpni+H4mWv1lKt0IpnUcUEneVA7AocI42q2Qva8DD6qPA46aWB2s2LUCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:07:15.974075Z","signed_message":"canonical_sha256_bytes"},"source_id":"1606.07299","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:460ddd1b920ac8e62482f263e0d4120b9b2260e7a348ea28fccd2715c5d44bfb","sha256:129bd33050c61fbe45cb8284ef907f7f011198890612cc1fca78d67783281015"],"state_sha256":"90975df42228d3edc702d066dc8d58d58c05287d4419b4f4121dbbee7de977c3"}