Entanglement of internal and external angular momenta of a single atom

Details Entanglement of internal and external angular momenta of a single atom Entanglement of internal and external angular momenta of a single atom

2001-11-09

arxiv.org/abs/quant-ph/0111058v1

Physics

Quantum Physics

4 pages, 2 figures

Scientific paper

10.1088/1464-4266/4/2/371

We consider the exchange of spin and orbital angular momenta between a circularly polarized Laguerre-Gaussian beam of light and a single atom trapped in a two-dimensional harmonic potential. The radiation field is treated classically but the atomic center-of-mass motion is quantized. The spin and orbital angular momenta of the field are individually conserved upon absorption, and this results in the entanglement of the internal and external degrees of freedom of the atom. We suggest applications of this entanglement in quantum information processing.

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