Spin-orbit-coupled Bose-Einstein condensate in a tilted optical lattice
- NORDITA, SE-106 91 Stockholm (Sweden) and Department of Physics, Stockholm University, AlbaNova University Center, SE-106 91 Stockholm (Sweden)
- Sweden
Bloch oscillations appear for a particle in a weakly tilted periodic potential. The intrinsic spin Hall effect is an outcome of a spin-orbit coupling. We demonstrate that both of these phenomena can be realized simultaneously in a gas of weakly interacting ultracold atoms exposed to a tilted optical lattice and to a set of spatially dependent light fields inducing an effective spin-orbit coupling. It is found that both the spin Hall and the Bloch oscillation effects may coexist, showing, however, a strong correlation between the two. These correlations are manifested as a transverse spin current oscillating in-phase with the Bloch oscillations. On top of the oscillations originating from the periodicity of the model, a trembling motion is found which is believed to be atomic Zitterbewegung. It is argued that the damping of these Zitterbewegung oscillations may to a large extent be prevented in the present setup considering a periodic optical lattice potential.
- OSTI ID:
- 21460003
- Journal Information:
- Physical Review. A, Vol. 82, Issue 4; Other Information: DOI: 10.1103/PhysRevA.82.043620; (c) 2010 The American Physical Society; ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ATOMS
BOSE-EINSTEIN CONDENSATION
CORRELATIONS
DAMPING
HALL EFFECT
L-S COUPLING
ORBITS
OSCILLATIONS
PERIODICITY
POTENTIALS
SPIN
VISIBLE RADIATION
ZITTERBEWEGUNG
ANGULAR MOMENTUM
COUPLING
ELECTROMAGNETIC RADIATION
INTERMEDIATE COUPLING
PARTICLE PROPERTIES
RADIATIONS
VARIATIONS