Quantized Rotation of Atoms From Photons with Orbital Angular Momentum

Details Quantized Rotation of Atoms From Photons with Orbital Angular Momentum Quantized Rotation of Atoms From Photons with Orbital Angular Momentum

2006-07-25

arxiv.org/abs/quant-ph/0607171v2

Physics

Quantum Physics

New version, 4 pages and 3 figures, accepted for publication in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.97.170406

We demonstrate the coherent transfer of the orbital angular momentum of a photon to an atom in quantized units of hbar, 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.

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