Renormalization Group Theory for the Imbalanced Fermi Gas
Abstract
We formulate a Wilsonian renormalization group theory for the imbalanced Fermi gas. The theory is able to recover quantitatively well-established results in both the weak-coupling and the strong-coupling (unitarity) limits. We determine for the latter case the line of second-order phase transitions of the imbalanced Fermi gas and, in particular, the location of the tricritical point. We obtain good agreement with the recent experiments of Y. Shin et al. [Nature (London)NATUAS0028-0836 451, 689 (2008)10.1038/nature06473].
- Publication:
-
Physical Review Letters
- Pub Date:
- April 2008
- DOI:
- 10.1103/PhysRevLett.100.140407
- arXiv:
- arXiv:0711.2963
- Bibcode:
- 2008PhRvL.100n0407G
- Keywords:
-
- 05.30.Fk;
- 03.75.-b;
- 11.10.Gh;
- 67.85.Lm;
- Fermion systems and electron gas;
- Matter waves;
- Renormalization;
- Degenerate Fermi gases;
- Condensed Matter - Statistical Mechanics;
- Condensed Matter - Superconductivity
- E-Print:
- Replaced with published version