Mean-field analysis of quantum phase transitions in a periodic optical superlattice

Arya Dhar, Manpreet Singh, Ramesh V. Pai, B. P. Das
2011 Physical Review A. Atomic, Molecular, and Optical Physics  
In this paper 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.
doi:10.1103/physreva.84.033631 fatcat:sld7zzarcvcsnbenrsntml73u4