How to Trap Photons? Storing Single-Photon Quantum States in Collective Atomic Excitations

Details How to Trap Photons? Storing Single-Photon Quantum States in Collective Atomic Excitations How to Trap Photons? Storing Single-Photon Quantum States in Collective Atomic Excitations

1999-12-06

arxiv.org/abs/quant-ph/9912022v1

Physics

Quantum Physics

14 pages, 6 figures, to appear in Optics Communications

Scientific paper

10.1016/S0030-4018(99)00679-3

We show that it is possible to ``store'' quantum states of single-photon fields by mapping them onto {\it collective} meta-stable states of an optically dense, coherently driven medium inside an optical resonator. An adiabatic technique is suggested which allows to transfer non-classical correlations from traveling-wave single-photon wave-packets into atomic states and vise versa with nearly 100% efficiency. In contrast to previous approaches involving single atoms, the present technique does not require the strong coupling regime corresponding to high-Q micro-cavities. Instead, intracavity Electromagnetically Induced Transparency is used to achieve a strong coupling between the cavity mode and the atoms.

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