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Scheme for generating a sequence of single photons of alternating polarisation

T. Wilk, H. P. Specht, S. C. Webster, G. Rempe, A. Kuhn

quant-pharXiv:quant-ph/0603083

Abstract

Single-photons of well-defined polarisation that are deterministically generated in a single spatio-temporal field mode are the key to the creation of multi-partite entangled states in photonic networks. Here, we present a novel scheme to produce such photons from a single atom in an optical cavity, by means of vacuum-stimulated Raman transitions between the Zeeman substates of a single hyperfine state. Upon each transition, a photon is emitted into the cavity, with a polarisation that depends on the direction of the Raman process.

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