Abstract
Spinor bosons offer a conceptually simple picture of macroscopic quantum behavior of topological order-by-disorder: The paramagnetic state of two-component dipolar bosons in an orbitally degenerate zigzag lattice is unstable against infinitesimal quantum fluctuations of orbitals, , towards developing nonlocal hidden order. Adjacent to the topological state a locally correlated exact ground state with spontaneously a quadrupoled lattice constant is realized for the broad parameter regime. The topological order is extremely robust surviving the limit where the ground state evolves into the Majumdar-Ghosh state of a frustrated spin- chain.
- Received 6 February 2014
- Revised 13 August 2014
DOI:https://doi.org/10.1103/PhysRevB.90.094414
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