{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2009:EHATZKJH52JHGNYAWYMQB2TTOP","short_pith_number":"pith:EHATZKJH","schema_version":"1.0","canonical_sha256":"21c13ca927ee92733700b61900ea7373e821cb90f54186f9c68d4442c5b33f47","source":{"kind":"arxiv","id":"0910.5869","version":2},"attestation_state":"computed","paper":{"title":"Nonlinear metrology with a quantum interface","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.atom-ph"],"primary_cat":"quant-ph","authors_text":"M. Napolitano, M. W. Mitchell","submitted_at":"2009-10-30T13:36:47Z","abstract_excerpt":"We describe nonlinear quantum atom-light interfaces and nonlinear quantum metrology in the collective continuous variable formalism. We develop a nonlinear effective Hamiltonian in terms of spin and polarization collective variables and show that model Hamiltonians of interest for nonlinear quantum metrology can be produced in $^{87}$Rb ensembles. With these Hamiltonians, metrologically relevant atomic properties, e.g. the collective spin, can be measured better than the \"Heisenberg limit\" $\\propto 1/N$. In contrast to other proposed nonlinear metrology systems, the atom-light interface allows"},"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":"0910.5869","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2009-10-30T13:36:47Z","cross_cats_sorted":["physics.atom-ph"],"title_canon_sha256":"60fa36d846990dbcc2130eda6cfa63eb23207e3a861f2cf000eb79c40a1b3d60","abstract_canon_sha256":"84e355ff9cb73d4d68b431759b4f19f901945abc2e7de5d1751c4a9421c3df59"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:11:01.353795Z","signature_b64":"6icj/E76q26sqlNdOIjK1ENIMwYKJagbWsKmRqNb/9YHxBSAL81w1ruvG/2t8GrHqdIXsSSoXSOJlA3nR9snCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"21c13ca927ee92733700b61900ea7373e821cb90f54186f9c68d4442c5b33f47","last_reissued_at":"2026-05-18T02:11:01.353056Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:11:01.353056Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Nonlinear metrology with a quantum interface","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.atom-ph"],"primary_cat":"quant-ph","authors_text":"M. Napolitano, M. W. Mitchell","submitted_at":"2009-10-30T13:36:47Z","abstract_excerpt":"We describe nonlinear quantum atom-light interfaces and nonlinear quantum metrology in the collective continuous variable formalism. We develop a nonlinear effective Hamiltonian in terms of spin and polarization collective variables and show that model Hamiltonians of interest for nonlinear quantum metrology can be produced in $^{87}$Rb ensembles. With these Hamiltonians, metrologically relevant atomic properties, e.g. the collective spin, can be measured better than the \"Heisenberg limit\" $\\propto 1/N$. In contrast to other proposed nonlinear metrology systems, the atom-light interface allows"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0910.5869","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":"0910.5869","created_at":"2026-05-18T02:11:01.353169+00:00"},{"alias_kind":"arxiv_version","alias_value":"0910.5869v2","created_at":"2026-05-18T02:11:01.353169+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.0910.5869","created_at":"2026-05-18T02:11:01.353169+00:00"},{"alias_kind":"pith_short_12","alias_value":"EHATZKJH52JH","created_at":"2026-05-18T12:25:59.703012+00:00"},{"alias_kind":"pith_short_16","alias_value":"EHATZKJH52JHGNYA","created_at":"2026-05-18T12:25:59.703012+00:00"},{"alias_kind":"pith_short_8","alias_value":"EHATZKJH","created_at":"2026-05-18T12:25:59.703012+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/EHATZKJH52JHGNYAWYMQB2TTOP","json":"https://pith.science/pith/EHATZKJH52JHGNYAWYMQB2TTOP.json","graph_json":"https://pith.science/api/pith-number/EHATZKJH52JHGNYAWYMQB2TTOP/graph.json","events_json":"https://pith.science/api/pith-number/EHATZKJH52JHGNYAWYMQB2TTOP/events.json","paper":"https://pith.science/paper/EHATZKJH"},"agent_actions":{"view_html":"https://pith.science/pith/EHATZKJH52JHGNYAWYMQB2TTOP","download_json":"https://pith.science/pith/EHATZKJH52JHGNYAWYMQB2TTOP.json","view_paper":"https://pith.science/paper/EHATZKJH","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=0910.5869&json=true","fetch_graph":"https://pith.science/api/pith-number/EHATZKJH52JHGNYAWYMQB2TTOP/graph.json","fetch_events":"https://pith.science/api/pith-number/EHATZKJH52JHGNYAWYMQB2TTOP/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/EHATZKJH52JHGNYAWYMQB2TTOP/action/timestamp_anchor","attest_storage":"https://pith.science/pith/EHATZKJH52JHGNYAWYMQB2TTOP/action/storage_attestation","attest_author":"https://pith.science/pith/EHATZKJH52JHGNYAWYMQB2TTOP/action/author_attestation","sign_citation":"https://pith.science/pith/EHATZKJH52JHGNYAWYMQB2TTOP/action/citation_signature","submit_replication":"https://pith.science/pith/EHATZKJH52JHGNYAWYMQB2TTOP/action/replication_record"}},"created_at":"2026-05-18T02:11:01.353169+00:00","updated_at":"2026-05-18T02:11:01.353169+00:00"}