Finite-range effect in the two-dimensional density-induced BCS-BEC crossover

被引：0
|
作者：
Sakakibara, Hikaru [1 ,2 ]
Tajima, Hiroyuki [1 ,3 ]
Liang, Haozhao [1 ,2 ]
机构：
[1] Univ Tokyo, Grad Sch Sci, Dept Phys, 7-3-1,Hongo, Bunkyo, Tokyo 1130033, Japan
[2] RIKEN, Interdisciplinary Theoret & Math Sci Program iTHEM, 2-1 Hirosawa, Wako, Saitama 3510198, Japan
[3] RIKEN Nishina Ctr, 2-1,1Hirosawa, Wako, Saitama 3510198, Japan
来源：
PROGRESS OF THEORETICAL AND EXPERIMENTAL PHYSICS | 2023年 / 2023卷 / 08期
关键词：
BOSE-CONDENSATION; PHASE-TRANSITIONS; SUPERCONDUCTIVITY; EVOLUTION;
D O I：
10.1093/ptep/ptad098
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We theoretically investigate the Bardeen-Cooper-Schrieffer (BCS) to Bose-Einstein condensation (BEC) crossover in a two-dimensional Fermi gas with the finite-range interaction by using the Hartree-Fock-Bogoliubov theory. Expanding the scattering phase shift in terms of the scattering length and effective range, we discuss the effect of the finite-range interaction on the pairing and thermodynamic properties. By solving the gap equation and the number equation self-consistently, we numerically calculate the effective-range dependence of the pairing gap, chemical potential, and pair size throughout the BCS-BEC crossover. Our results would be useful for further understanding of low-dimensional many-body problems.
引用
收藏
页数：12
相关论文
共 50 条
  • [31] Josephson relation for the superfluid density in the BCS-BEC crossover
    Taylor, Edward
    PHYSICAL REVIEW B, 2008, 77 (14):
  • [32] Superfluid density and condensate fraction in the BCS-BEC crossover regime at finite temperatures
    Fukushima, N.
    Ohashi, Y.
    Taylor, E.
    Griffin, A.
    PHYSICAL REVIEW A, 2007, 75 (03)
  • [33] Induced interactions in the BCS-BEC crossover of two-dimensional Fermi gases with Rashba spin-orbit coupling
    Lee, Juhee
    Kim, Dong-Hee
    PHYSICAL REVIEW A, 2017, 95 (03)
  • [34] Josephson effect throughout the BCS-BEC crossover
    Spuntarelli, A.
    Pieri, P.
    Strinati, G. C.
    PHYSICAL REVIEW LETTERS, 2007, 99 (04)
  • [35] Evolution of the vortex state in the BCS-BEC crossover of a quasi two-dimensional superfluid Fermi gas
    Luo, Xuebing
    Zhou, Kezhao
    Zhang, Zhidong
    CHINESE PHYSICS B, 2016, 25 (11)
  • [36] Evolution of the vortex state in the BCS-BEC crossover of a quasi two-dimensional superfluid Fermi gas
    罗学兵
    周可召
    张志东
    Chinese Physics B, 2016, 25 (11) : 158 - 162
  • [37] Superfluid density in the BCS-BEC crossover regime of a two-component Fermi gas at finite temperatures
    Ohashi, Yoji
    JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM, 2007, 20 (7-8) : 609 - 612
  • [38] Superfluid Density in the BCS-BEC Crossover Regime of a Two-Component Fermi Gas at Finite Temperatures
    Yoji Ohashi
    Journal of Superconductivity and Novel Magnetism, 2007, 20 : 609 - 612
  • [39] Polarized Fermi gases at finite temperature in the BCS-BEC crossover
    Pantel, Pierre-Alexandre
    Davesne, Dany
    Urban, Michael
    PHYSICAL REVIEW A, 2014, 90 (05):
  • [40] Superfluid density in the BCS-BEC crossover regime of a Fermi superfluid
    Ohashi, Y.
    Fukushima, N.
    Matsumoto, H.
    Taylor, E.
    Griffin, A.
    PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, 2008, 468 (7-10): : 599 - 604
12345