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Condensed Matter > Quantum Gases

arXiv:1311.4229 (cond-mat)
[Submitted on 17 Nov 2013 (v1), last revised 29 Jan 2014 (this version, v2)]

Title:Functional renormalization group approach to conventional theory of superfluidity and beyond

Authors:Yuya Tanizaki, Gergely Fejős, Tetsuo Hatsuda
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Abstract:Fermionic functional renormalization group (FRG) is applied to describe the superfluid phase transition of the two-component fermionic system with attractive contact interaction. Connection between the fermionic FRG approach and the Bardeen-Cooper-Schrieffer (BCS) theory with its Gorkov and Melik-Barkhudarov (GMB) correction is made clear, and the FRG flow of the fermion self-energy is also studied to go beyond the BCS+GMB theory. The superfluid transition temperature and the associated chemical potential are calculated in the region of the negative scattering length using fermionic FRG.
Comments: 5 pages, 5 figures, to appear in proceedings of XVII. International Conference on Recent Progress in Many-Body Theories (MBT17), some new references are added
Subjects: Quantum Gases (cond-mat.quant-gas); Superconductivity (cond-mat.supr-con); High Energy Physics - Phenomenology (hep-ph); Nuclear Theory (nucl-th)
Report number: RIKEN-QHP-103
Cite as: arXiv:1311.4229 [cond-mat.quant-gas]
  (or arXiv:1311.4229v2 [cond-mat.quant-gas] for this version)
  https://doi.org/10.48550/arXiv.1311.4229
Journal reference: Journal of Physics: Conference Series 529 (2014) 012027
Related DOI: https://doi.org/10.1088/1742-6596/529/1/012027

Submission history

From: Yuya Tanizaki [view email]
[v1] Sun, 17 Nov 2013 23:10:42 UTC (71 KB)
[v2] Wed, 29 Jan 2014 06:48:46 UTC (71 KB)
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