{"paper":{"title":"Tunable dual-species Bose-Einstein condensates of $^{39}$K and $^{87}$Rb","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.atom-ph"],"primary_cat":"cond-mat.quant-gas","authors_text":"C. Klempt, D. Birkmose, J.J. Arlt, J. Sherson, L. Wacker, N. B. J{\\o}rgensen, N. Winter, R. Horchani, W. Ertmer","submitted_at":"2015-05-29T09:52:40Z","abstract_excerpt":"We present the production of dual-species Bose-Einstein condensates of $^{39}\\mathrm{K}$ and $^{87}\\mathrm{Rb}$. Preparation of both species in the $\\left| F=1,m_F=-1 \\right\\rangle$ state enabled us to exploit a total of three Fesh\\-bach resonances which allows for simultaneous Feshbach tuning of the $^{39}\\mathrm{K}$ intraspecies and the $^{39}\\mathrm{K}$-$^{87}\\mathrm{Rb}$ interspecies scattering length. Thus dual-species Bose-Einstein condensates were produced by sympathetic cooling of $^{39}\\mathrm{K}$ with $^{87}\\mathrm{Rb}$. A dark spontaneous force optical trap was used for $^{87}\\mathr"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1505.07975","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"}