Expansion of Bose-Hubbard Mott insulators in optical lattices

  title={Expansion of Bose-Hubbard Mott insulators in optical lattices},
  author={Mark Jreissaty and Juan Felipe Carrasquilla and F. Alexander Wolf and Marcos Rigol},
  journal={Physical Review A},
We study the expansion of bosonic Mott insulators in the presence of an optical lattice after switching off a confining potential. We use the Gutzwiller mean-field approximation and consider two different setups. In the first one, the expansion is restricted to one direction. We show that this leads to the emergence of two condensates with well-defined momenta, and argue that such a construct can be used to create atom lasers in optical lattices. In the second setup, we study Mott insulators… 

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