Bloch oscillations of spin-orbit-coupled cold atoms in an optical lattice and spin current generation

Abstract

We study the Bloch oscillation dynamics of a spin-orbit-coupled cold atomic gas trapped inside a one-dimensioanl optical lattice. The eigenspectra of the system is identified as two interpenetrating Wannier-Stark ladder. Based on that, we carefully analyzed the Bloch oscillation dynamics and found out that intraladder coupling between neighboring rungs of Wannier-Stark ladder give rise to ordinary Bloch oscillation while interladder coupling lead to small amplitude high frequency oscillation superimposed on it. Specifically spin-orbit interaction breaks Galilean invariance, which can be reflected by out-of-phase oscillation of the two spin components in the accelerated frame. The possibility of generating spin current in this system are also explored.

8 pages, 6 figures

References in corpus (15)

• Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
• Degenerate Quantum Gases with Spin-Orbit Coupling
• On A Proper Definition of Spin Current
• Superfluidity of Bose-Einstein Condensate in An Optical Lattice: Landau-Zener Tunneling and Dynamical Instability
• Spin-orbit coupled Bose-Einstein condensates in a one-dimensional optical lattice
• Bose-Einstein Condensates in Spin-Orbit Coupled Optical Lattices: Flat Bands and Superfluidity
• Bloch oscillations in one-dimensional spinor gas
• Bloch Oscillations in Optical and Zeeman Lattices in the Presence of Spin-Orbit Coupling
• Localization of a spin-orbit coupled Bose-Einstein condensate in a bichromatic optical lattice
• Finite-Momentum Dimer Bound State in Spin-Orbit Coupled Fermi Gas
• Controlling Transport of Ultra-Cold Atoms in 1D Optical Lattices with Artificial Gauge Fields
• Bloch-Landau-Zener dynamics in single-particle Wannier-Zeeman systems
• Goos-Hänchen shifts in spin-orbit-coupled cold atoms
• Interplay between quantum dissipation and an in-plane magnetic field in the spin ratchet effect
• Spin-sensitive atom mirror via spin-orbit interaction

Cited by in corpus (6)

• Stückelberg interferometry using spin-orbit-coupled cold atoms in an optical lattice
• Spin Josephson effects of spin-orbit-coupled Bose-Einstein condensates in a non-Hermitian double well
• Bound states of spin-orbit coupled cold atoms in a Dirac delta-function potential
• Coherent control of spin tunneling in a spin-orbit coupled bosonic triple well
• Stabilizing period-doubled density waves by spin-orbit coupling in Bose-Einstein condensates in optical lattices
• Band-edge superfluid of Bose-Einstein condensates in the spin-orbit-coupled Zeeman lattice