Talk Title: Quantum phase transitions of two-species Bose-Hubbard
models We study the quantum phases of the two-species bosons on a two-dimensional square lattice. Using large scale quantum Monte Carlo (QMC) simulation by the Worm Algorithm we identify the phase boundaries and the nature of different phases. When the nearest neighbor Coulomb interaction is turned off, we find the paired-superfluid phase. When the nearest neighbor Coulomb interaction is turned on, we find the paired-supersolid phase. Finally we identify the universality class of some of the transitions. |