2011/06/30 by Zhengkun Fu, Pengjun Wang, Shijie Chai +2 · 1 citation
Physics and Astronomy · #cond-mat.quant-gas
paper · pdf · doi:10.1103/physreva.84.043609
published as Phys. Rev. A 84, 043609 (2011) · 4 pages, 4 figures
arxiv created 2011/08/21 · arxiv updated 2015/05/28
We present a simple experiment of creating an effective vector gauge potential for Bose-Einstein condensed 87Rb in the F=2 hyperfine ground state using two crossed 1064 nm optical dipole trap lasers as the Raman beams. Due to the far-detuning from the single-photon resonance with the electronically excited state, the spontaneous emission is strongly reduced, at the same time, the moderate strength of the Raman coupling still can be achieved. The atoms at the far detuning of the Raman coupling are loaded adiabatically into the dressed states by ramping the homogeneous bias magnetic field to resonance and the different energy dressed states are studied. This experiment is easily extended to produce synthetic magnetic or electric field from a spatial or time dependence of the effective vector potential.