Superfluidity of spin-1 bosons in optical lattices
arXiv:cond-mat/0506099 · doi:10.1103/PhysRevA.71.053607
Abstract
In this paper we show that the superfluidity of cold spin--1 Bose atoms of weak interactions in an optical lattice can be realized according to the excitation energy spectrum which is derived by means of Bogliubov transformation. The characteristic of the superfluid-phase spectrum is explained explicitly in terms of the nonvanishing critical velocity, i.e., the Landau criterion. It is observed that critical velocities of superfluid are different for three spin components and, moreover, can be controlled by adjusting the lattice parameters in practical experiments to detect the superfluid phase.
arXiv comment12 pages
References in corpus (16)
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
- Theory of Bose-Einstein condensation in trapped gases
- Cold bosonic atoms in optical lattices
- Spinor Bose Condensates in Optical Traps
- Spin domains in ground state spinor Bose-Einstein condensates
- Optical Confinement of a Bose-Einstein Condensate
- Bose-Einstein condensation with internal degrees of freedom in alkali atom gases
- The dynamics of component separation in a binary mixture of Bose-Einstein condensates
- Quantum spins mixing in spinor Bose-Einstein condensates
- Quantum phases in an optical lattice
- Observation of Superfluid Flow in a Bose-Einstein Condensed Gas
- Fragmented and Single Condensate Ground States of Spin-1 Bose Gas
- Spin-exchange interactions of spin-one bosons in optical lattices: singlet, nematic and dimerized Phases
- Superfluid Dynamics of a Bose-Einstein Condensate in a Periodic Potential
- Superfluid-Mott Insulator Transition of Spin-1 Bosons in an Optical Lattice
- Quantum phase transition of condensed bosons in optical lattices