Phys. Rev. Lett. 97, 190406 (2006) [4 pages]Quantum Stripe Ordering in Optical LatticesReceived 28 June 2006; published 10 November 2006 We predict the robust existence of a novel quantum orbital stripe order in the p-band Bose-Hubbard model of two-dimensional triangular optical lattices with cold bosonic atoms. An orbital angular momentum moment is formed on each site exhibiting a stripe order both in the superfluid and Mott-insulating phases. The stripe order spontaneously breaks time-reversal, lattice translation, and rotation symmetries. In addition, it induces staggered plaquette bond currents in the superfluid phase. Possible signatures of this stripe order in the time of flight experiment are discussed. © 2006 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.97.190406
DOI:
10.1103/PhysRevLett.97.190406
PACS:
05.30.Jp, 03.75.Lm, 73.43.Nq, 74.50.+r
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