Two species Bosonic Hubbard model in a two-dimensional optical lattice

ORAL

Abstract

We study a two-component hardcore bosonic Hubbard model in a two- dimensional optical lattice by performing Quantum Monte Carlo (QMC) simulations. Our model contains a repulsive interspecies interaction between the two species of bosons and a hopping term between nearest neighbors. The phase diagram shows magnetic orderings, insulatings and superfluid phases as a function of doping for balanced populations. We predict the appearance of a first order phase transition from an antiferromagnetic phase to a superfluid phase near half filling. A phase transition from superfluid to an exotic phase occurs away from half filling at very low temperature.

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Authors

  • Kalani Hettiarachchilage

    Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA

  • Valy Rousseau

    Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA, Louisiana State University

  • Juana Moreno

    Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA, Louisiana State University, Department of Physics and Astronomy, Louisiana State University

  • Mark Jarrell

    Louisiana State University, Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana 70803, USA, Department of Physics and Astronomy, Louisiana State University