Finite-temperature phase structures of hard-core bosons in an optical lattice with an effective magnetic field

  title={Finite-temperature phase structures of hard-core bosons in an optical lattice with an effective magnetic field},
  author={Yuki Nakano and Kenichi Kasamatsu and Tetsuo Matsui},
  journal={Physical Review A},
We study finite-temperature phase structures of hard-core bosons in a two-dimensional optical lattice subject to an effective magnetic field by employing the gauged CP$^1$ model. Based on the extensive Monte Carlo simulations, we study their phase structures at finite temperatures for several values of the magnetic flux per plaquette of the lattice and mean particle density. Despite the presence of the particle number fluctuation, the thermodynamic properties are qualitatively similar to those… 
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