Time reversal symmetry breaking of $p$-orbital bosons in a one-dimensional optical lattice

Details Time reversal symmetry breaking of $p$-orbital bosons in a one-dimensional optical lattice Time reversal symmetry breaking of $p$-orbital bosons in a one-dimensional optical lattice

2011-10-15

arxiv.org/abs/1110.3364v2

Phys. Rev. Lett 108,175302 (2012)

Physics

Condensed Matter

Quantum Gases

4+ pages, version accepted by Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.108.175302

We study bosons loaded in a one-dimensional optical lattice of two-fold $p$-orbital degeneracy at each site. Our numerical simulations find an anti-ferro-orbital p$_x$+ip$_y$, a homogeneous p$_x$ Mott insulator phase and two kinds of superfluid phases distinguished by the orbital order (anti-ferro-orbital and para-orbital). The anti-ferro-orbital order breaks time reversal symmetry. Experimentally observable evidence is predicted for the phase transition between the two different superfluid phases. We also discover that the quantum noise measurement is able to provide a concrete evidence of time reversal symmetry breaking in the first Mott phase.

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