Speed of the Goldstone Sound Mode of an Atomic Fermi Gas Loaded on a Square Optical Lattice with a Non-Abelian Gauge Field in the Presence of a Zeeman Field
The slope of the Goldstone sound mode of a Fermi gas in a square optical lattice subject to a non-Abelian gauge field . The graphs are obtained by applying the Gaussian and the BS secular determinants. The system parameters are the same as in Figure 1. The arrows show the values of for which the opening and closing of a gap take place.