Spontaneous rotation in one-dimensional systems of cold atoms
arXiv:0712.0431 · doi:10.1103/PhysRevA.78.013623
Abstract
We theoretically study harmonically trapped one-dimensional Bose gases (e.g., Li, Na, K, Rb, etc.) with multibands occupied, focusing on effects of higher-energy bands. Combining the Ginzburg-Landau theory with the bosonization techniques, we predict that the repulsive interaction between higher-band bosons and the quantum fluctuation can induce the ground state with a finite angular momentum around the trapped axis. In this state, the Z_2 reflection symmetry (clockwise or anticlockwise rotations) is spontaneously broken.
6 pages, 3 figures, final version
References in corpus (8)
- Atomic Scattering in Presence of an External Confinement and a Gas of Impenetrable Bosons
- Realization of Bose-Einstein condensates in lower dimensions
- Bosonizing one-dimensional cold atomic gases
- Weak Coupling Phase Diagram of the Two Chain Hubbard Model
- Instabilities in binary mixtures of one-dimensional quantum degenerate gases
- Field-induced chiral phase in isotropic frustrated spin chains
- Vector chirality and inhomogeneous magnetization in frustrated spin tubes in high magnetic fields
- Ferromagnetic Transition in One-Dimensional Itinerant Electron Systems