Double Species Bose-Einstein Condensate with Tunable Interspecies Interactions

2008/03/19 by Gregor Thalhammer, G. Thalhammer, Giovanni Barontini +6 · 1 citation
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cold Atom Physics and Bose-Einstein Condensates #Quantum, superfluid, helium dynamics #cond-mat.other

paper · pdf · doi:10.1103/physrevlett.100.210402

published as Phys. Rev. Lett. 100, 210402 (2008) · 4 pages, 4 figures

arxiv created 2008/03/19 · openalex publication_date 2008/05/29 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

We produce Bose-Einstein condensates of two different species, 87Rb and 41K, in an optical dipole trap in proximity of interspecies Feshbach resonances. We discover and characterize two Feshbach resonances, located around 35 and 79 G, by observing the three-body losses and the elastic cross section. The narrower resonance is exploited to create a double species condensate with tunable interactions. Our system opens the way to the exploration of double species Mott insulators and, more in general, of the quantum phase diagram of the two-species Bose-Hubbard model.

Citations

• Degenerate Bose-Bose mixture in a three-dimensional optical lattice
• K<mml:none/><mml:none/><mml:mprescripts/><mml:none/>40−Rb<mml:none/><mml:none/><mml:mprescripts/><mml:none/>87Feshbach resonances: Modeling the interatomic potential
• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Near-threshold model for ultracold KRb dimers from interisotope Feshbach spectroscopy
• Sympathetic Cooling with Two Atomic Species in an Optical Trap

Cited by

• Quantum Tricriticality at the Superfluid-Insulator Transition of Binary Bose Mixtures