摘要
We use a two-photon dressing field to create an effective vector gauge potential for Bose-Einstein-condensed Rb87 atoms in the F=1 hyperfine ground state. These Raman-dressed states are spin and momentum superpositions, and we adiabatically load the atoms into the lowest energy dressed state. The effective Hamiltonian of these neutral atoms is like that of charged particles in a uniform magnetic vector potential whose magnitude is set by the strength and detuning of the Raman coupling. The spin and momentum decomposition of the dressed states reveals the strength of the effective vector potential, and our measurements agree quantitatively with a simple single-particle model. While the uniform effective vector potential described here corresponds to zero magnetic field, our technique can be extended to nonuniform vector potentials, giving nonzero effective magnetic fields.
摘要译文
我们使用双光子敷料场在F \x3d 1超精细基态中为Bose-Einstein-浓缩Rb87原子创建有效的矢量测量电位。这些拉曼穿透状态是自旋和动量叠加，并且我们将原子平行加载最低能量穿透状态这些中性原子的有效哈密顿量与均匀磁矢量电势中的带电粒子的像素一样，其强度由Raman耦合的强度和失谐所决定。穿透状态的自旋和动量分解揭示了有效矢量势的强度，我们的测量与简单的单粒子模型定量一致。尽管这里描述的均匀有效矢量电位对应于零磁场，但是我们的技术可以扩展到非均匀矢量电位，给出非零有效磁场
Y.-J. Lin; R. L. Compton; A. R. Perry; W. D. Phillips; J. V. Porto;;I. B. Spielman Joint Quantum Institute; National Institute of Standards;Technology;;University of Maryland; Gaithersburg; Maryland; 20899; USA. Bose-Einstein Condensate in a Uniform Light-Induced Vector Potential[J]. Physical Review Letters, 2009,102(13)