Topological order-by-disorder in orbitally degenerate dipolar bosons in zig-zag lattice
arXiv:1401.6401 · doi:10.1103/PhysRevB.90.094414
Abstract
Spinor bosons offer conceptually simple picture of macroscopic quantum behavior of topological order-by-disorder: Paramagnetic state of two-component dipolar bosons in orbitally degenerate zig-zag lattice is unstable against infinitezimal quantum fluctuations of orbitals towards developing non-local hidden order. Adjacent to the topological state locally correlated exact ground state with spontaneously quadrupoled lattice constant is realized for the broad parameter regime.
5 pages, 5 figures
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