{"paper":{"title":"Partially ferromagnetic electromagnet for trapping and cooling neutral atoms to quantum degeneracy","license":"","headline":"","cross_cats":[],"primary_cat":"cond-mat.other","authors_text":"Alain Aspect (LCFIO), Andr\\'e Villing (LCFIO), Fr\\'ed\\'eric Moron (LCFIO), Jean-F\\'elix Riou (LCFIO), Marie Fauquembergue (LCFIO), Michel L\\'ecrivain (SATIE), Philippe Bouyer (LCFIO), Sadiq Rangwala (LCFIO), William Guerin (LCFIO), Yann Le Coq (LCFIO)","submitted_at":"2005-07-06T07:30:28Z","abstract_excerpt":"We have developed a compact partially ferromagnetic electromagnet to produce a Ioffe-Pritchard trap for neutral atoms. Our structure permits strong magnetic confinement with low power consumption. Compared to the previous iron-core electromagnet, it allows for easy compensation of remnant fields and very high stability, along with cost-effective realization and compactness. We describe and characterize our apparatus and demonstrate trapping and cooling of Rb 87 atoms to quantum degeneracy. Pure Bose-Einstein condensates containing 10^6 atoms are routinely realized on a half-minute cycle. In ad"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"cond-mat/0507129","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"}