Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session F24: Quantum Gases in Optical Lattices
11:15 AM–1:51 PM,
Tuesday, March 5, 2019
BCEC
Room: 159
Sponsoring
Unit:
DAMOP
Chair: Ulrich Schneider, Cambridge University
Abstract: F24.00008 : Enhancement and destruction of superfluidity: Unusual effects of population imbalance of atomic Fermi gases on a 1D optical lattice*
12:39 PM–12:51 PM
Presenter:
Qijin Chen
(Department of Physics, Zhejiang University)
Authors:
Qijin Chen
(Department of Physics, Zhejiang University)
Jibiao Wang
(School of Physics and Astronomy, Sun Yat-Sen University (Zhuhai Campus), China)
imbalance may strongly enhance the superfluidity by raising Tc to the constant BEC asymptote. In addition to the destruction of superfluidity in some range of intermediate pairing strengths, the BEC regime may also become inaccessible when the lattice spacing d and the population imbalance p become large, and/or the lattice hopping integral t becomes small, in contrast to the 3D continuum or dilute 3D lattice case, for which the BEC regime is always accessible. Furthermore, even when the BEC regime is accessible, not all minority atoms are paired up in the BEC limit. Upon destruction of the superfluidity due to increasing (d,p) or decreasing t, only 50% of the minority atoms form pairs.
*Supported by NSF of China (Grant No. 11774309) and the NSF of Zhejiang Province (Grant No.LZ13A040001).
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