{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2016:PYVMEXF4W53FMJ2EQPUOH3BVPO","short_pith_number":"pith:PYVMEXF4","schema_version":"1.0","canonical_sha256":"7e2ac25cbcb77656274483e8e3ec357bb11b28d6a3c9616b13767f0c024592ba","source":{"kind":"arxiv","id":"1604.05087","version":2},"attestation_state":"computed","paper":{"title":"Preparation of ultracold atom clouds at the shot noise level","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.atom-ph"],"primary_cat":"quant-ph","authors_text":"Andrew J. Hilliard, Carsten Klempt, Jacob F. Sherson, Jan J. Arlt, Mick A. Kristensen, Miroslav Gajdacz, Poul L. Pedersen","submitted_at":"2016-04-18T11:11:04Z","abstract_excerpt":"We prepare number stabilized ultracold clouds through the real-time analysis of non-destructive images and the application of feedback. In our experiments, the atom number ${N\\sim10^6}$ is determined by high precision Faraday imaging with uncertainty $\\Delta_N$ below the shot noise level, i.e., $\\Delta_N <\\sqrt{N}$. Based on this measurement, feedback is applied to reduce the atom number to a user-defined target, whereupon a second imaging series probes the number stabilized cloud. By this method, we show that the atom number in ultracold clouds can be prepared below the shot noise level."},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1604.05087","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2016-04-18T11:11:04Z","cross_cats_sorted":["physics.atom-ph"],"title_canon_sha256":"4a338bc1da5893e0790bac881c9c886f3667c7da55bcbb77286e38121171b73d","abstract_canon_sha256":"0a53da845312e0ff78eeaab6980b76f00466ddd896e2152b50d8f81cf1d0f75e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:08:41.882483Z","signature_b64":"/A24GPsDSm0W3PS95INF+aH/cKeu8CSuM3blhvG5IIsgFMd330fFK4fpcvxiSAbII9SxIVX4qMFaOvoqYWL9Dg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"7e2ac25cbcb77656274483e8e3ec357bb11b28d6a3c9616b13767f0c024592ba","last_reissued_at":"2026-05-18T01:08:41.881876Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:08:41.881876Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Preparation of ultracold atom clouds at the shot noise level","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.atom-ph"],"primary_cat":"quant-ph","authors_text":"Andrew J. Hilliard, Carsten Klempt, Jacob F. Sherson, Jan J. Arlt, Mick A. Kristensen, Miroslav Gajdacz, Poul L. Pedersen","submitted_at":"2016-04-18T11:11:04Z","abstract_excerpt":"We prepare number stabilized ultracold clouds through the real-time analysis of non-destructive images and the application of feedback. In our experiments, the atom number ${N\\sim10^6}$ is determined by high precision Faraday imaging with uncertainty $\\Delta_N$ below the shot noise level, i.e., $\\Delta_N <\\sqrt{N}$. Based on this measurement, feedback is applied to reduce the atom number to a user-defined target, whereupon a second imaging series probes the number stabilized cloud. By this method, we show that the atom number in ultracold clouds can be prepared below the shot noise level."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1604.05087","kind":"arxiv","version":2},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1604.05087","created_at":"2026-05-18T01:08:41.881971+00:00"},{"alias_kind":"arxiv_version","alias_value":"1604.05087v2","created_at":"2026-05-18T01:08:41.881971+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1604.05087","created_at":"2026-05-18T01:08:41.881971+00:00"},{"alias_kind":"pith_short_12","alias_value":"PYVMEXF4W53F","created_at":"2026-05-18T12:30:39.010887+00:00"},{"alias_kind":"pith_short_16","alias_value":"PYVMEXF4W53FMJ2E","created_at":"2026-05-18T12:30:39.010887+00:00"},{"alias_kind":"pith_short_8","alias_value":"PYVMEXF4","created_at":"2026-05-18T12:30:39.010887+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/PYVMEXF4W53FMJ2EQPUOH3BVPO","json":"https://pith.science/pith/PYVMEXF4W53FMJ2EQPUOH3BVPO.json","graph_json":"https://pith.science/api/pith-number/PYVMEXF4W53FMJ2EQPUOH3BVPO/graph.json","events_json":"https://pith.science/api/pith-number/PYVMEXF4W53FMJ2EQPUOH3BVPO/events.json","paper":"https://pith.science/paper/PYVMEXF4"},"agent_actions":{"view_html":"https://pith.science/pith/PYVMEXF4W53FMJ2EQPUOH3BVPO","download_json":"https://pith.science/pith/PYVMEXF4W53FMJ2EQPUOH3BVPO.json","view_paper":"https://pith.science/paper/PYVMEXF4","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1604.05087&json=true","fetch_graph":"https://pith.science/api/pith-number/PYVMEXF4W53FMJ2EQPUOH3BVPO/graph.json","fetch_events":"https://pith.science/api/pith-number/PYVMEXF4W53FMJ2EQPUOH3BVPO/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/PYVMEXF4W53FMJ2EQPUOH3BVPO/action/timestamp_anchor","attest_storage":"https://pith.science/pith/PYVMEXF4W53FMJ2EQPUOH3BVPO/action/storage_attestation","attest_author":"https://pith.science/pith/PYVMEXF4W53FMJ2EQPUOH3BVPO/action/author_attestation","sign_citation":"https://pith.science/pith/PYVMEXF4W53FMJ2EQPUOH3BVPO/action/citation_signature","submit_replication":"https://pith.science/pith/PYVMEXF4W53FMJ2EQPUOH3BVPO/action/replication_record"}},"created_at":"2026-05-18T01:08:41.881971+00:00","updated_at":"2026-05-18T01:08:41.881971+00:00"}