Abstract
We analyze the various phases exhibited by a system of ultracold bosons in a periodic optical superlattice using the mean-field decoupling approximation. We investigate for a wide range of commensurate and incommensurate densities. We find the gapless superfluid phase, the gapped Mott insulator phase, and gapped insulator phases with distinct density wave orders.
1 More- Received 15 June 2011
DOI:https://doi.org/10.1103/PhysRevA.84.033631
©2011 American Physical Society