2018/02/28 by Rianne S. Lous, Isabella Fritsche, Michael Jag +4
Physics and Astronomy · #quant-ph #cond-mat.quant-gas
paper · pdf · doi:10.1103/physrevlett.120.243403
published as Phys. Rev. Lett. 120, 243403 (2018) · The Supplemental Materials are located in the Ancillary files
arxiv created 2018/06/14 · arxiv updated 2018/06/15
We probe the interface between a phase-separated Bose-Fermi mixture consisting of a small BEC of 41K residing in a large Fermi sea of 6Li. We quantify the residual spatial overlap between the two components by measuring three-body recombination losses for variable strength of the interspecies repulsion. A comparison with a numerical mean-field model highlights the importance of the kinetic energy term for the condensed bosons in maintaining the thin interface far into the phase-separated regime. Our results demonstrate a corresponding smoothing of the phase transition in a system of finite size.