1. First-Order Phase Transitions in Optical Lattices with Tunable Three-Body Onsite Interaction
- Author
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Massachusetts Institute of Technology. Department of Physics, Safavi-Naini, Arghavan, Stecher, Javier von, Capogrosso-Sansone, B., Rittenhouse, Seth T., Massachusetts Institute of Technology. Department of Physics, Safavi-Naini, Arghavan, Stecher, Javier von, Capogrosso-Sansone, B., and Rittenhouse, Seth T.
- Abstract
We study the two-dimensional Bose-Hubbard model in the presence of a three-body interaction term, both at a mean-field level and via quantum Monte Carlo simulations. The three-body term is tuned by coupling the triply occupied states to a trapped universal trimer. We find that, for a sufficiently attractive three-body interaction, the n=2 Mott lobe disappears and the system displays first-order phase transitions separating the n=1 from the n=3 lobes and the n=1 and n=3 Mott insulator from the superfluid. We also analyze the effect of finite temperature and find that transitions are still of first order at temperatures T∼J, where J is the hopping matrix element.
- Published
- 2013