{"paper":{"title":"A 2-level system of cold sodium atoms with high and tunable susceptibility against the magnetic field","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cond-mat.stat-mech","nucl-th"],"primary_cat":"physics.atom-ph","authors_text":"Chengguang Bao, Daoxin Yao, Yanzhang He, Zhibing Li","submitted_at":"2013-09-17T01:50:25Z","abstract_excerpt":"A 2-level spin-system of cold sodium atoms is proposed. Both the cases that the system has arrived at thermo-equilibrium and is in the early stage of evolution have been studied. This system is inert to the magnetic field $B$ in general but very sensitive in a narrow domain around $B=B_0$, where $B_0$ can be predicted and is tunable. A characteristic constant $\\gamma=0.278466$ dedicated to various 2-level systems is found, and leads to a upper limit for the internal energy $U$ of the whole system so that $U\\leq\\gamma k_B T$. This limit is considerably lower than the energy assigned to the spat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1309.4148","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"}