{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:3TUPTVRWBYFCJNU7OMMRSDHXH6","short_pith_number":"pith:3TUPTVRW","schema_version":"1.0","canonical_sha256":"dce8f9d6360e0a24b69f7319190cf73fabc6313c0a1c60b7a9234f9e307fd6c7","source":{"kind":"arxiv","id":"1502.00470","version":1},"attestation_state":"computed","paper":{"title":"Two-axis spin squeezing in two cavities","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Caifeng Li, Gang Chen, Jingtao Fan, Lixuan Yu, Suotang Jia, Tian-Cai Zhang","submitted_at":"2015-02-02T13:28:53Z","abstract_excerpt":"Ultracold atoms in an ultrahigh-finesse optical cavity are a powerful platform to produce spin squeezing since photon of cavity mode can induce nonlinear spin-spin interaction and thus generate a one-axis twisting Hamiltonian $H_{\\text{OAT}}=qJ_{x}^{2}$, whose corresponding maximal squeezing factor scales as $N^{-2/3}$, where $N$ is the atomic number. On the contrary, for the other two-axis twisting Hamiltonian $H_{\\text{TAT}}=q(J_{x}^{2}-J_{y}^{2})$, the maximal squeezing factor scales as $N^{-1}$, approaching the Heisenberg limit. In this paper, inspired by recent experiments of cavity-assis"},"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":"1502.00470","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"quant-ph","submitted_at":"2015-02-02T13:28:53Z","cross_cats_sorted":[],"title_canon_sha256":"d00d34c7e39827cb41a90eb4cf94a748f8f79d3343ec8473a257a4c558ec4387","abstract_canon_sha256":"ad3aec980834d9910dceb0b4320682128420039a8e475bb9e9404e4b8b393b71"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:28:05.959027Z","signature_b64":"sTCjIlX5IjqL/2PCajqmgYKRDWG9EgpjUKOhUUNP0H4VxhHKwmY/wMDrpk/7rBx73P2bd28PsuyLpRKwURlFCw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"dce8f9d6360e0a24b69f7319190cf73fabc6313c0a1c60b7a9234f9e307fd6c7","last_reissued_at":"2026-05-18T02:28:05.958679Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:28:05.958679Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Two-axis spin squeezing in two cavities","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"quant-ph","authors_text":"Caifeng Li, Gang Chen, Jingtao Fan, Lixuan Yu, Suotang Jia, Tian-Cai Zhang","submitted_at":"2015-02-02T13:28:53Z","abstract_excerpt":"Ultracold atoms in an ultrahigh-finesse optical cavity are a powerful platform to produce spin squeezing since photon of cavity mode can induce nonlinear spin-spin interaction and thus generate a one-axis twisting Hamiltonian $H_{\\text{OAT}}=qJ_{x}^{2}$, whose corresponding maximal squeezing factor scales as $N^{-2/3}$, where $N$ is the atomic number. On the contrary, for the other two-axis twisting Hamiltonian $H_{\\text{TAT}}=q(J_{x}^{2}-J_{y}^{2})$, the maximal squeezing factor scales as $N^{-1}$, approaching the Heisenberg limit. In this paper, inspired by recent experiments of cavity-assis"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1502.00470","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1502.00470","created_at":"2026-05-18T02:28:05.958731+00:00"},{"alias_kind":"arxiv_version","alias_value":"1502.00470v1","created_at":"2026-05-18T02:28:05.958731+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1502.00470","created_at":"2026-05-18T02:28:05.958731+00:00"},{"alias_kind":"pith_short_12","alias_value":"3TUPTVRWBYFC","created_at":"2026-05-18T12:29:02.477457+00:00"},{"alias_kind":"pith_short_16","alias_value":"3TUPTVRWBYFCJNU7","created_at":"2026-05-18T12:29:02.477457+00:00"},{"alias_kind":"pith_short_8","alias_value":"3TUPTVRW","created_at":"2026-05-18T12:29:02.477457+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/3TUPTVRWBYFCJNU7OMMRSDHXH6","json":"https://pith.science/pith/3TUPTVRWBYFCJNU7OMMRSDHXH6.json","graph_json":"https://pith.science/api/pith-number/3TUPTVRWBYFCJNU7OMMRSDHXH6/graph.json","events_json":"https://pith.science/api/pith-number/3TUPTVRWBYFCJNU7OMMRSDHXH6/events.json","paper":"https://pith.science/paper/3TUPTVRW"},"agent_actions":{"view_html":"https://pith.science/pith/3TUPTVRWBYFCJNU7OMMRSDHXH6","download_json":"https://pith.science/pith/3TUPTVRWBYFCJNU7OMMRSDHXH6.json","view_paper":"https://pith.science/paper/3TUPTVRW","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1502.00470&json=true","fetch_graph":"https://pith.science/api/pith-number/3TUPTVRWBYFCJNU7OMMRSDHXH6/graph.json","fetch_events":"https://pith.science/api/pith-number/3TUPTVRWBYFCJNU7OMMRSDHXH6/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/3TUPTVRWBYFCJNU7OMMRSDHXH6/action/timestamp_anchor","attest_storage":"https://pith.science/pith/3TUPTVRWBYFCJNU7OMMRSDHXH6/action/storage_attestation","attest_author":"https://pith.science/pith/3TUPTVRWBYFCJNU7OMMRSDHXH6/action/author_attestation","sign_citation":"https://pith.science/pith/3TUPTVRWBYFCJNU7OMMRSDHXH6/action/citation_signature","submit_replication":"https://pith.science/pith/3TUPTVRWBYFCJNU7OMMRSDHXH6/action/replication_record"}},"created_at":"2026-05-18T02:28:05.958731+00:00","updated_at":"2026-05-18T02:28:05.958731+00:00"}