Quantized rotation of atoms from photons with orbital angular momentum
Quantized rotation of atoms from photons with orbital angular momentum
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DOI：
10.1103/physrevlett.97.170406
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发表时间：
2006-10-27
影响因子：
8.6
通讯作者：
Phillips, W. D.
中科院分区：
文献类型：
--
作者：
Andersen, M. F.;Ryu, C.;Phillips, W. D.
利用双光子受激拉曼过程，利用拉盖尔-高斯光束在钠原子玻色-爱因斯坦凝聚体中产生原子涡旋态，我们证明了以h为量子化单位的光子轨道角动量到原子的相干转移。我们通过创建不同涡旋态的叠加来证明这一过程是相干的，其中态之间的相对相位由光场的相对相位决定。此外，我们通过将两个光子的轨道角动量传递给每个原子来产生电荷2的涡旋。
We demonstrate the coherent transfer of the orbital angular momentum of a photon to an atom in quantized units of h, using a 2-photon stimulated Raman process with Laguerre-Gaussian beams to generate an atomic vortex state in a Bose-Einstein condensate of sodium atoms. We show that the process is coherent by creating superpositions of different vortex states, where the relative phase between the states is determined by the relative phases of the optical fields. Furthermore, we create vortices of charge 2 by transferring to each atom the orbital angular momentum of two photons.