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Journal of Experimental and Theoretical Physics Letters

Generation of continuous-variable entanglement in a three-level system

Y. H., E. Wu

Published Apr 1, 2011• 4 citations
Publisher

Abstract

A single three-level atom interacting with a two-mode cavity is studied. The generation of output entanglement and output squeezing is investigated. It shows that this system can serve as an output-entanglement source. By tuning the pump field or the detuning, strong entanglement can be generated.
DOI
10.1134/s0021364011040114

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The dynamics behavior of output squeezing and entanglement is investigated, based on the off-resonant interaction of a four-level atom with a low-QQQ cavity and two classical fields. By means of the input-output theory, we show that the two-mode squeezing and entanglement of the output fields can always exist. It is found that the maximum entanglement is insensitive to the cavity decay rate, but can be optimized by adjusting the ratio between the effective coupling constants.