Wilson Ratio of Fermi Gases in One Dimension

• DOI: 10.1103/physrevlett.111.130401
• Publication Date: 2013-09-24T15:36:35Z
• Authors: X.-W. Guan; X.-G. Yin; A. Foerster; M. T. Batchelor; C.-H. Lee; H.-Q. Lin
• Keywords: Luttinger liquid

We calculate the Wilson ratio of one-dimensional Fermi gas with spin imbalance. The attractively interacting fermions is solely determined by density stiffness and sound velocity pairs excess for two-component Tomonaga-Luttinger liquid phase. exhibits anomalous enhancement at two critical points due to sudden change in states. Despite a breakdown quasiparticle description one dimension, important features are retained; namely, specific heat linearly proportional temperature, whereas susceptibility independent temperature. In contrast phenomenological parameter, provides powerful parameter testing universal quantum liquids one, two, three dimensions.