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Mott insulator dynamics | | Emil Lundh
; | | Date: |
6 May 2011 | | Abstract: | The dynamics of a lattice Bose gas in a time-dependent external potential is
studied in a mean-field approximation. The conditions under which a Mott
insulating region can melt, and the local density adjust to the new potential,
are determined. In the case of a suddenly switched potential, it is found that
the Mott insulator stays insulating and the density will not adjust if the
quench is too abrupt. This comes about because too rapid currents result in
Umklapp-type current reversals. For a stirrer moved through a Mott insulating
cloud, it is seen that only if the velocity is comparable to the time scale set
by the tunneling, will the Mott insulator be affected. | | Source: | arXiv, 1105.1263 | | Services: | Forum | Review | PDF | Favorites | |
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