Dipolar Bose-Hubbard model

  title={Dipolar Bose-Hubbard model},
  author={Ethan Lake and Michael Hermele and Todadri Senthil},
  journal={Physical Review B},
We study a simple model of interacting bosons on a d -dimensional cubic lattice whose dynamics conserves both total boson number and total boson dipole moment. This model provides a simple framework in which several remarkable consequences of dipole conservation can be explored. As a function of chemical potential and hopping strength, the model can be tuned between gapped Mott insulating phases and various types of gapless condensates. The condensed phase realized at large hopping strengths… 

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