Dimensionality and Finite Number Effect on BCS Transition of Atomic Fermi Gas |
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Authors: | CUI Hai-Tao WANG Lin-Cheng YI Xue-Xi |
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Institution: | 1. Physics Department, Dalian University of Techology, Dalian 116024, China
;2. Institute of Theoretical Physics, Northeast Normal University, Changchun 130024, China |
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Abstract: | The effect of finite number and dimensionality has been discussed in
this paper. The finite number effect has a negative correction to final
temperature for 2D or 3D atomic Fermi gases. The changing of
final temperature obtained by scanning from BEC region to BCS
region are 10% or so with N≤103 and can be negligible
when N>103. However, in 1D atomic Fermi gas, the effect gives a positive correction which greatly changes the final temperature in Fermi
gas. This behavior is completely opposed to the 2D and 3D cases and a
proper explanation is still to be found. Dimensionality also has a
positive correction, in which the more tightly trapping, the higher final
temperature one gets with the same particle number. A discussion
is also presented. |
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Keywords: | finite number effect dimensionality atomic BCS transition |
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