{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:AFJE7UHYRPU6XHFMW3COWHMP73","short_pith_number":"pith:AFJE7UHY","canonical_record":{"source":{"id":"1407.5132","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-07-18T23:02:46Z","cross_cats_sorted":[],"title_canon_sha256":"471374b9adea7966d7d14a04f1ed04c0c9fa93ff35c5f04958023ec3acc1c515","abstract_canon_sha256":"ab55b6c52a22e0c8a6bd95eba8b7b38bd6d952a34eea414d66814633b85afba4"},"schema_version":"1.0"},"canonical_sha256":"01524fd0f88be9eb9cacb6c4eb1d8ffecef34dce668a0ff66914a6e748093d1d","source":{"kind":"arxiv","id":"1407.5132","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.5132","created_at":"2026-05-18T02:19:28Z"},{"alias_kind":"arxiv_version","alias_value":"1407.5132v1","created_at":"2026-05-18T02:19:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.5132","created_at":"2026-05-18T02:19:28Z"},{"alias_kind":"pith_short_12","alias_value":"AFJE7UHYRPU6","created_at":"2026-05-18T12:28:19Z"},{"alias_kind":"pith_short_16","alias_value":"AFJE7UHYRPU6XHFM","created_at":"2026-05-18T12:28:19Z"},{"alias_kind":"pith_short_8","alias_value":"AFJE7UHY","created_at":"2026-05-18T12:28:19Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:AFJE7UHYRPU6XHFMW3COWHMP73","target":"record","payload":{"canonical_record":{"source":{"id":"1407.5132","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-07-18T23:02:46Z","cross_cats_sorted":[],"title_canon_sha256":"471374b9adea7966d7d14a04f1ed04c0c9fa93ff35c5f04958023ec3acc1c515","abstract_canon_sha256":"ab55b6c52a22e0c8a6bd95eba8b7b38bd6d952a34eea414d66814633b85afba4"},"schema_version":"1.0"},"canonical_sha256":"01524fd0f88be9eb9cacb6c4eb1d8ffecef34dce668a0ff66914a6e748093d1d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:19:28.484958Z","signature_b64":"W16KumTnRL01J4ggQcqUAtgkgOwwVt0mWEUv7XocNWTSSKrGqIzXn6JjwSz8vBLqUeddlit4zcjQIdISyFoiCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"01524fd0f88be9eb9cacb6c4eb1d8ffecef34dce668a0ff66914a6e748093d1d","last_reissued_at":"2026-05-18T02:19:28.484291Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:19:28.484291Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1407.5132","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":"2026-05-18T02:19:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"EtAbtDo+FvsCq+Sb8iyyw3ak5DwaLAR/Yc6uApC9K4nH81UguIQntfUltfnVm+PxxvnIwh9H95sUDjyHMWZBCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T08:38:48.170741Z"},"content_sha256":"395288819ae3257c57efc8fc768961898864297ba9872be784cf97b17c643f35","schema_version":"1.0","event_id":"sha256:395288819ae3257c57efc8fc768961898864297ba9872be784cf97b17c643f35"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:AFJE7UHYRPU6XHFMW3COWHMP73","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Conditional Ramsey Spectroscopy with Synchronized Atoms","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Minghui Xu, M. J. Holland","submitted_at":"2014-07-18T23:02:46Z","abstract_excerpt":"We investigate Ramsey spectroscopy performed on a synchronized ensemble of two-level atoms. The synchronization is induced by the collective coupling of the atoms to a heavily damped mode of an optical cavity. We show that, in principle, with this synchronized system it is possible to observe Ramsey fringes indefinitely, even in the presence of spontaneous emission and other sources of individual-atom dephasing. This could have important consequences for atomic clocks and a wide range of precision metrology applications."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.5132","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":"2026-05-18T02:19:28Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OYkoeD00q4XE0GjbOgbBW7aEP/DPi20PVhQdzd4ZZWDM6th7cQCEUZri4joyZkQ4DNvKt7BH/o++Sopnc+yfDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-09T08:38:48.171463Z"},"content_sha256":"19be6881217acf9fc2a1b690eec862fc0cce75d4cd41e2efee80f5d5df48eaf4","schema_version":"1.0","event_id":"sha256:19be6881217acf9fc2a1b690eec862fc0cce75d4cd41e2efee80f5d5df48eaf4"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/AFJE7UHYRPU6XHFMW3COWHMP73/bundle.json","state_url":"https://pith.science/pith/AFJE7UHYRPU6XHFMW3COWHMP73/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/AFJE7UHYRPU6XHFMW3COWHMP73/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":"2026-06-09T08:38:48Z","links":{"resolver":"https://pith.science/pith/AFJE7UHYRPU6XHFMW3COWHMP73","bundle":"https://pith.science/pith/AFJE7UHYRPU6XHFMW3COWHMP73/bundle.json","state":"https://pith.science/pith/AFJE7UHYRPU6XHFMW3COWHMP73/state.json","well_known_bundle":"https://pith.science/.well-known/pith/AFJE7UHYRPU6XHFMW3COWHMP73/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:AFJE7UHYRPU6XHFMW3COWHMP73","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":"ab55b6c52a22e0c8a6bd95eba8b7b38bd6d952a34eea414d66814633b85afba4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-07-18T23:02:46Z","title_canon_sha256":"471374b9adea7966d7d14a04f1ed04c0c9fa93ff35c5f04958023ec3acc1c515"},"schema_version":"1.0","source":{"id":"1407.5132","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1407.5132","created_at":"2026-05-18T02:19:28Z"},{"alias_kind":"arxiv_version","alias_value":"1407.5132v1","created_at":"2026-05-18T02:19:28Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1407.5132","created_at":"2026-05-18T02:19:28Z"},{"alias_kind":"pith_short_12","alias_value":"AFJE7UHYRPU6","created_at":"2026-05-18T12:28:19Z"},{"alias_kind":"pith_short_16","alias_value":"AFJE7UHYRPU6XHFM","created_at":"2026-05-18T12:28:19Z"},{"alias_kind":"pith_short_8","alias_value":"AFJE7UHY","created_at":"2026-05-18T12:28:19Z"}],"graph_snapshots":[{"event_id":"sha256:19be6881217acf9fc2a1b690eec862fc0cce75d4cd41e2efee80f5d5df48eaf4","target":"graph","created_at":"2026-05-18T02:19:28Z","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 investigate Ramsey spectroscopy performed on a synchronized ensemble of two-level atoms. The synchronization is induced by the collective coupling of the atoms to a heavily damped mode of an optical cavity. We show that, in principle, with this synchronized system it is possible to observe Ramsey fringes indefinitely, even in the presence of spontaneous emission and other sources of individual-atom dephasing. This could have important consequences for atomic clocks and a wide range of precision metrology applications.","authors_text":"Minghui Xu, M. J. Holland","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-07-18T23:02:46Z","title":"Conditional Ramsey Spectroscopy with Synchronized Atoms"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1407.5132","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":"sha256:395288819ae3257c57efc8fc768961898864297ba9872be784cf97b17c643f35","target":"record","created_at":"2026-05-18T02:19:28Z","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":"ab55b6c52a22e0c8a6bd95eba8b7b38bd6d952a34eea414d66814633b85afba4","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2014-07-18T23:02:46Z","title_canon_sha256":"471374b9adea7966d7d14a04f1ed04c0c9fa93ff35c5f04958023ec3acc1c515"},"schema_version":"1.0","source":{"id":"1407.5132","kind":"arxiv","version":1}},"canonical_sha256":"01524fd0f88be9eb9cacb6c4eb1d8ffecef34dce668a0ff66914a6e748093d1d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"01524fd0f88be9eb9cacb6c4eb1d8ffecef34dce668a0ff66914a6e748093d1d","first_computed_at":"2026-05-18T02:19:28.484291Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T02:19:28.484291Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"W16KumTnRL01J4ggQcqUAtgkgOwwVt0mWEUv7XocNWTSSKrGqIzXn6JjwSz8vBLqUeddlit4zcjQIdISyFoiCA==","signature_status":"signed_v1","signed_at":"2026-05-18T02:19:28.484958Z","signed_message":"canonical_sha256_bytes"},"source_id":"1407.5132","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:395288819ae3257c57efc8fc768961898864297ba9872be784cf97b17c643f35","sha256:19be6881217acf9fc2a1b690eec862fc0cce75d4cd41e2efee80f5d5df48eaf4"],"state_sha256":"11c1438333fc9e9e68cca5c2e4611e163fc2230e00a5f417201221ebcdfd5c54"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"iQMa5e4QMnuz8Gh0LtOTlyuX7duvv/H8wZ9BizJG3XROhw3kz9vs3Tr2TQNKC1jF8RAeDHifaAFtJ4tkS3WgDQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-09T08:38:48.175371Z","bundle_sha256":"4a6a3cf03d83f48ea23f40bf18657dc7b3974689eb02db4238b7658cdceff305"}}