{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:EKRVUUQWV56HAW7E3ZUSVCOR3C","short_pith_number":"pith:EKRVUUQW","canonical_record":{"source":{"id":"1103.0335","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-03-02T02:29:15Z","cross_cats_sorted":["physics.atom-ph"],"title_canon_sha256":"20254abe8f839f18c5a740f5015f0964859d7c0a7a07b223122f9b0fb00b2b7e","abstract_canon_sha256":"b1f1ed92664c275e6db1df688a5449d5271877a60d2d735d9bbeb5971825cbf1"},"schema_version":"1.0"},"canonical_sha256":"22a35a5216af7c705be4de692a89d1d89b95bff2c5061eaf10322a9a2e7ebd96","source":{"kind":"arxiv","id":"1103.0335","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1103.0335","created_at":"2026-05-18T04:00:39Z"},{"alias_kind":"arxiv_version","alias_value":"1103.0335v1","created_at":"2026-05-18T04:00:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1103.0335","created_at":"2026-05-18T04:00:39Z"},{"alias_kind":"pith_short_12","alias_value":"EKRVUUQWV56H","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"EKRVUUQWV56HAW7E","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"EKRVUUQW","created_at":"2026-05-18T12:26:28Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:EKRVUUQWV56HAW7E3ZUSVCOR3C","target":"record","payload":{"canonical_record":{"source":{"id":"1103.0335","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-03-02T02:29:15Z","cross_cats_sorted":["physics.atom-ph"],"title_canon_sha256":"20254abe8f839f18c5a740f5015f0964859d7c0a7a07b223122f9b0fb00b2b7e","abstract_canon_sha256":"b1f1ed92664c275e6db1df688a5449d5271877a60d2d735d9bbeb5971825cbf1"},"schema_version":"1.0"},"canonical_sha256":"22a35a5216af7c705be4de692a89d1d89b95bff2c5061eaf10322a9a2e7ebd96","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:00:39.456917Z","signature_b64":"18dzwInC9jJKqkdegEO+D0yt9ZVafUkd98f9PaRdTKiaaa4UXGhegnrYHcfuQp/2jiEZhfXkLypmRXEm+nzRBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"22a35a5216af7c705be4de692a89d1d89b95bff2c5061eaf10322a9a2e7ebd96","last_reissued_at":"2026-05-18T04:00:39.456289Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:00:39.456289Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1103.0335","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:00:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"U1pRU/0eBA2/TJ+3MfXyJLNiW8RaoOgIxjVl4BqqgJxhoFbplr2FJjP6rFz6/aambe2CaDdnl6AnRoQEMZizAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T16:22:29.906026Z"},"content_sha256":"404e32d33163c70bd0cc7c5a6676e0349f8e8e74935fc65d5bda65426c8fde18","schema_version":"1.0","event_id":"sha256:404e32d33163c70bd0cc7c5a6676e0349f8e8e74935fc65d5bda65426c8fde18"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:EKRVUUQWV56HAW7E3ZUSVCOR3C","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Conditional Spin-Squeezing of a Large Ensemble via the Vacuum Rabi Splitting","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.atom-ph"],"primary_cat":"quant-ph","authors_text":"James K. Thompson, Jiayan Dai, Justin G. Bohnet, Shannon R. Sankar, Zilong Chen","submitted_at":"2011-03-02T02:29:15Z","abstract_excerpt":"We use the vacuum Rabi splitting to perform quantum nondemolition (QND) measurements that prepare a conditionally spin-squeezed state of a collective atomic psuedo-spin. We infer a 3.4(6) dB improvement in quantum phase estimation relative to the standard quantum limit for a coherent spin state composed of uncorrelated atoms. The measured collective spin is composed of the two-level clock states of nearly 10^6 Rb-87 atoms confined inside a low finesse F = 710 optical cavity. This technique may improve atomic sensor precision and/or bandwidth, and may lead to more precise tests of fundamental p"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.0335","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:00:39Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZEtt4CoRcii/HQ9d2K7/HAbjhWkFhXwlhQ/6yYFmAbqb6TrbS4+RLXL9dbAmN+2JUw0rkBEmjWPRaj7lBkDCAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T16:22:29.906398Z"},"content_sha256":"a0700b8f2ca2cd1fa8877b6a28525f8cbf96575c3d08f2dcced452b854edbdf9","schema_version":"1.0","event_id":"sha256:a0700b8f2ca2cd1fa8877b6a28525f8cbf96575c3d08f2dcced452b854edbdf9"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/EKRVUUQWV56HAW7E3ZUSVCOR3C/bundle.json","state_url":"https://pith.science/pith/EKRVUUQWV56HAW7E3ZUSVCOR3C/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/EKRVUUQWV56HAW7E3ZUSVCOR3C/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-09T16:22:29Z","links":{"resolver":"https://pith.science/pith/EKRVUUQWV56HAW7E3ZUSVCOR3C","bundle":"https://pith.science/pith/EKRVUUQWV56HAW7E3ZUSVCOR3C/bundle.json","state":"https://pith.science/pith/EKRVUUQWV56HAW7E3ZUSVCOR3C/state.json","well_known_bundle":"https://pith.science/.well-known/pith/EKRVUUQWV56HAW7E3ZUSVCOR3C/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:EKRVUUQWV56HAW7E3ZUSVCOR3C","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":"b1f1ed92664c275e6db1df688a5449d5271877a60d2d735d9bbeb5971825cbf1","cross_cats_sorted":["physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-03-02T02:29:15Z","title_canon_sha256":"20254abe8f839f18c5a740f5015f0964859d7c0a7a07b223122f9b0fb00b2b7e"},"schema_version":"1.0","source":{"id":"1103.0335","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1103.0335","created_at":"2026-05-18T04:00:39Z"},{"alias_kind":"arxiv_version","alias_value":"1103.0335v1","created_at":"2026-05-18T04:00:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1103.0335","created_at":"2026-05-18T04:00:39Z"},{"alias_kind":"pith_short_12","alias_value":"EKRVUUQWV56H","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_16","alias_value":"EKRVUUQWV56HAW7E","created_at":"2026-05-18T12:26:28Z"},{"alias_kind":"pith_short_8","alias_value":"EKRVUUQW","created_at":"2026-05-18T12:26:28Z"}],"graph_snapshots":[{"event_id":"sha256:a0700b8f2ca2cd1fa8877b6a28525f8cbf96575c3d08f2dcced452b854edbdf9","target":"graph","created_at":"2026-05-18T04:00:39Z","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 use the vacuum Rabi splitting to perform quantum nondemolition (QND) measurements that prepare a conditionally spin-squeezed state of a collective atomic psuedo-spin. We infer a 3.4(6) dB improvement in quantum phase estimation relative to the standard quantum limit for a coherent spin state composed of uncorrelated atoms. The measured collective spin is composed of the two-level clock states of nearly 10^6 Rb-87 atoms confined inside a low finesse F = 710 optical cavity. This technique may improve atomic sensor precision and/or bandwidth, and may lead to more precise tests of fundamental p","authors_text":"James K. Thompson, Jiayan Dai, Justin G. Bohnet, Shannon R. Sankar, Zilong Chen","cross_cats":["physics.atom-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-03-02T02:29:15Z","title":"Conditional Spin-Squeezing of a Large Ensemble via the Vacuum Rabi Splitting"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1103.0335","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":"sha256:404e32d33163c70bd0cc7c5a6676e0349f8e8e74935fc65d5bda65426c8fde18","target":"record","created_at":"2026-05-18T04:00:39Z","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":"b1f1ed92664c275e6db1df688a5449d5271877a60d2d735d9bbeb5971825cbf1","cross_cats_sorted":["physics.atom-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2011-03-02T02:29:15Z","title_canon_sha256":"20254abe8f839f18c5a740f5015f0964859d7c0a7a07b223122f9b0fb00b2b7e"},"schema_version":"1.0","source":{"id":"1103.0335","kind":"arxiv","version":1}},"canonical_sha256":"22a35a5216af7c705be4de692a89d1d89b95bff2c5061eaf10322a9a2e7ebd96","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"22a35a5216af7c705be4de692a89d1d89b95bff2c5061eaf10322a9a2e7ebd96","first_computed_at":"2026-05-18T04:00:39.456289Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:00:39.456289Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"18dzwInC9jJKqkdegEO+D0yt9ZVafUkd98f9PaRdTKiaaa4UXGhegnrYHcfuQp/2jiEZhfXkLypmRXEm+nzRBg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:00:39.456917Z","signed_message":"canonical_sha256_bytes"},"source_id":"1103.0335","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:404e32d33163c70bd0cc7c5a6676e0349f8e8e74935fc65d5bda65426c8fde18","sha256:a0700b8f2ca2cd1fa8877b6a28525f8cbf96575c3d08f2dcced452b854edbdf9"],"state_sha256":"49081364c3c01a2c0b08e6f907274c1bb7d7c7acdef2040c6762e039b72bc8b3"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RN7ykGo5bM10wQihm9uKNjnM6cPSnDlwtT2Ud8Q+3eIsSGkgT15SiaKyUQCPAnL2cPIdkyhs+D6hfri46BDaBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T16:22:29.908460Z","bundle_sha256":"aba9446dde1dec712305a8716bd9d3f4701155aba18631ee57ccdcc34bd009de"}}