Scientific Results

Dual-species Bose-Einstein condensate of 41K and 87Rb in a hybrid trap

Year: 2018

Authors: Burchianti A., D’Errico C., Rosi S., Simoni A., Modugno M., Fort C., Minardi F.

Autors Affiliation: Istituto Nazionale di Ottica, CNR-INO, 50019 Sesto Fiorentino, Italy; LENS and Dipartimento di Fisica e Astronomia, Università di Firenze, 50019 Sesto Fiorentino, Italy; Univ Rennes, CNRS, IPR (Institut de Physique de Rennes)-UMR 6251, F-35000 Rennes, France; Departamento de Física Teórica e Historia de la Ciencia, Universidad del Pais Vasco UPV/EHU, 48080 Bilbao, Spain; IKERBASQUE, Basque Foundation for Science, 48013 Bilbao, Spain; Dipartimento di Fisica e Astronomia, Università di Bologna, 40127 Bologna, Italy

Abstract: We report on the production of a 41K-87Rb dual-species Bose-Einstein condensate in a hybrid trap, consisting of a magnetic quadrupole and an optical dipole potential. After loading both atomic species in the trap, we cool down 87Rb first by magnetic and then by optical evaporation, while 41K is sympathetically cooled by elastic collisions with 87Rb. We eventually produce two-component condensates with more than 10^5 atoms and tunable species population imbalance. We observe the immiscibility of the quantum mixture by measuring the density profile of each species after releasing them from the trap.

Journal/Review: PHYSICAL REVIEW A

Volume: 98      Pages from: 063616-1  to: 063616-8

More Information: We gratefully thank Massimo Inguscio for suggestions and support, Marco Prevedelli and Giacomo Roati for useful discussions, and Saverio Bartalini and Julia Emily Bjørnstøm for collaboration at the initial stage of this work. We also acknowledge the continuous help from the technical staff of LENS and the Physics and Astronomy Department of Florence. This work was supported by the European Commission through FP7 Cooperation STREP Project EQuaM (Grant No. 323714) and FET Flagship on Quantum Technologies, Qombs Project (Grant No. 820419). M.M. acknowledges support from the Spanish Ministry of Economy, Industry and Competitiveness and the European Regional Development Fund FEDER through Grant No. FIS2015-67161-P (MINECO/FEDER, UE) and from the Basque Government through Grant No. IT986-16.
KeyWords: Binary alloys; Bose-Einstein condensation; Potassium alloys; Rubidium; Statistical mechanics, Atomic species; Bose-Einstein condensates; Density profile; Elastic collision; Magnetic quadrupoles; Optical dipoles; Two-component, Rubidium alloys
DOI: 10.1103/PhysRevA.98.063616

Citations: 4
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