Prediction of quantum stripe ordering in optical lattices

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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.
4 pages, three figures, accepted by Phys. Rev. Lett

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Strongly Correlated Electrons, Superconductivity, Quantum Physics

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http://salesiana.dossiersoluciones.com/handle/123456789/112255

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0606743
 http://arxiv.org/abs/cond-mat/0606743
 Phys. Rev. Lett. 97, 190406 (2006)
 doi:10.1103/PhysRevLett.97.190406

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arXiv