Pomeranchuk effect and spin-gradient cooling of Bose-Bose mixtures

  title={Pomeranchuk effect and spin-gradient cooling of Bose-Bose mixtures},
  author={Ya Qing Li and Mohammad reza Bakhtiari and L. He and Walter Hofstetter},
We theoretically investigate finite-temperature thermodynamics and demagnetization cooling of two-component Bose-Bose mixtures in a cubic optical lattice, by using bosonic dynamical mean-field theory (BDMFT). We calculate the finite-temperature phase diagram, and remarkably find that the system can be heated from the superfluid into the Mott insulator at low temperature, analogous to the Pomeranchuk effect in ${}^{3}$He. This provides a promising many-body cooling technique. We examine the… 
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