scholarly journals Cooper pairs with zero center-of-mass momentum and their first-order correlation function in a two-dimensional ultracold Fermi gas near a Berezinskii-Kosterlitz-Thouless transition

2016 ◽  
Vol 93 (1) ◽  
Author(s):  
Morio Matsumoto ◽  
Daisuke Inotani ◽  
Yoji Ohashi
Keyword(s):  
Correlation Function ◽  
Center Of Mass ◽  
Fermi Gas ◽  
Ultracold Fermi Gas ◽  
Cooper Pairs ◽  
Two Dimensional ◽  
First Order

scholarly journals Effect of weak disorder on the BCS–BEC crossover in a two-dimensional Fermi gas

2017 ◽  
Vol 31 (09) ◽  
pp. 1750066
Author(s):  
Ayan Khan ◽  
B. Tanatar
Keyword(s):  
Field Theory ◽  
Mean Field Theory ◽  
Mean Field ◽  
Fermi Gas ◽  
Ultracold Fermi Gas ◽  
Condensate Fraction ◽  
Two Dimensional ◽  
Weak Disorder ◽  
Unique Nature

In this paper, we study the two-dimensional (2D) ultracold Fermi gas with weak impurity in the framework of mean-field theory where the impurity is introduced through Gaussian fluctuations. We have investigated the role of the impurity by studying the experimentally accessible quantities such as condensate fraction and equation of state of the ultracold systems. Our analysis reveals that at the crossover, the disorder enhances superfluidity, which we attribute to the unique nature of the unitary region and to the dimensional effect.

scholarly journals Response Functions for the Two-Dimensional Ultracold Fermi Gas: Dynamical BCS Theory and Beyond

2017 ◽  
Vol 189 (5-6) ◽  
pp. 312-327 ◽  
Author(s):  
Ettore Vitali ◽  
Hao Shi ◽  
Mingpu Qin ◽  
Shiwei Zhang
Keyword(s):  
Fermi Gas ◽  
Bcs Theory ◽  
Ultracold Fermi Gas ◽  
Two Dimensional ◽  
Response Functions

scholarly journals Bragg Scattering of Cooper Pairs in an Ultracold Fermi Gas

2007 ◽  
Vol 98 (9) ◽  
Author(s):  
K. J. Challis ◽  
R. J. Ballagh ◽  
C. W. Gardiner
Keyword(s):  
Fermi Gas ◽  
Ultracold Fermi Gas ◽  
Cooper Pairs ◽  
Bragg Scattering
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