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arXiv:quant-ph/0407233 · Physical Review A

Atom-photon, atom-atom, and photon-photon entanglement preparation by fractional adiabatic passage

M. Amniat-Talab, S. Guérin, Nicolas Sangouard, Hans Rudolf Jauslin

Published Feb 10, 2005• 61 citations
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Abstract

We propose a relatively robust scheme to generate maximally entangled states of (i) an atom and a cavity photon, (ii) two atoms in their ground states, and (iii) two photons in two spatially separate high-$Q$ cavities. It is based on the interaction via fractional adiabatic passage of a three-level atom traveling through a cavity mode and a laser beam. The presence of optical phases is emphasized.

DOI
10.1103/physreva.71.023805

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A scheme is proposed for generating a three-dimensional entangled state for two atoms trapped in a cavity by one step via adiabatic passage. In the scheme, the two atoms are always in ground states and the field mode of the cavity excited is negligible under a certain condition. Therefore, the scheme is very robust against decoherence. Furthermore, it needs neither the exact control of all parameters nor the accurate control of the interaction time. It is shown that qutrit entanglement can be generated with a high fidelity.
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