Format

Send to

Choose Destination
Phys Rev Lett. 2012 Feb 17;108(7):075302. Epub 2012 Feb 14.

Topologically induced avoided band crossing in an optical checkerboard lattice.

Author information

1
Institut für Laser-Physik, Universität Hamburg, Hamburg, Germany.

Abstract

We report on the condensation of bosons in the 4th band of an optical checkerboard lattice providing a topologically induced avoided band crossing involving the 2nd, 3rd, and 4th Bloch bands. When the condensate is slowly tuned through the avoided crossing, accelerated band relaxation arises and the zero momentum approximately C4-invariant condensate wave function acquires finite momentum order and reduced C2 symmetry. For faster tuning Landau-Zener oscillations between different superfluid orders arise, which are used to characterize the avoided crossing.

Supplemental Content

Full text links

Icon for American Physical Society
Loading ...
Support Center