Equilibrium angular momentum and edge current in Bose-condensed cold atom systems with k-space Berry curvature
arXiv:1506.01172 · doi:10.1103/PhysRevA.95.033628
Abstract
In this paper we study the properties of cold bosons in a two-dimensional optical lattice system where Bose-condensation occurs at a momentum point k with non-zero k-space Berry curvature. By combining results from both analytic and numerical approaches, we show that the boson system carries non-universal, temperature dependent equilibrium angular momentum and edge current at low temperatures.
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