Dhar, A; Mishra, T; Pai, R. V; Mukerjee, S; Das, B. P
(American Physical Society, 2013-11-21)
We study a system of hard-core bosons at half-filling in a one-dimensional optical superlattice. The bosons are allowed to hop to nearest- and next-nearest-neighbor sites. We obtain the ground-state phase diagram as a ...