Quantum and Thermal Phase Transitions in a Bosonic Atom-Molecule Mixture in a Two-dimensional Optical Lattice

Laurent de Forges de Parny, Valéry G. Rousseau

We study the ground state and the thermal phase diagram of a two-species Bose-Hubbard model, with $U(1)\times {\mathbb{Z}}_2$ symmetry, describing atoms and molecules on a 2D optical…