Entanglement of the orbital angular momentum states of the photons generated in a hot atomic ensemble

Abstract

Quantum protocols will be more efficient with high-dimensional entangled states. Photons carrying orbital angular momenta can be used to create a high-dimensional entangled state. In this paper we experimentally demonstrate the entanglement of the orbital angular momentum between the Stokes and anti-Stokes photons generated in a hot atomic ensemble using spontaneous four-wave-mixing. This experiment also suggests the existence of the entanglement concerned with spatial degrees of freedom between the hot atomic ensemble and the Stokes photon.

5 pages, 4 figures

References in corpus (2)

• Entanglement of orbital angular momentum states between an ensemble of cold atoms and a photon
• Computation of topological charges of optical vortices via non-degenerate four-wave-mixing

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• Off-axis retrieval of orbital angular momentum of light stored in cold atoms
• Generation of subnatural-linewidth orbital angular momentum entangled biphotons using a single driving laser in hot atoms
• Spin-orbit coupling of optical vector vortices in coherently prepared media
• Probing topological charge of discrete vortices