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Atom–photon, two-mode entanglement and two-mode squeezing in the presence of cross-Kerr nonlinearity

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Abstract

The interaction of two quantized fields and three-level quantum system in a \(\Lambda \)-type configuration is investigated in the presence of cross-Kerr nonlinearity. We consider three models of coupling for the atom–photon interaction. First, we study the dynamical behavior of the atom–photon entanglement and show that increasing the cross-Kerr nonlinearity results in different behaviors in three considered models. Moreover, it is demonstrated that the two quantized modes can be entangled, on the other hand, by applying a classical driving field to the lower levels. Increasing the classical driving field destroys the long time atom–photon entanglement. Our results show that an oscillatory two-mode squeezing can be generated in the absence of a driving classical field and the cross-Kerr nonlinearity.

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Acknowledgments

Ali Mortezapour would like to Dr. Bahman Ahmadi for his useful assistance in English writing of this paper.

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Authors and Affiliations

  1. Department of Physics, University of Guilan, P.O. Box 41335-19141, Rasht, Iran

    Ali Mortezapour

  2. Physics Department, University of Zanjan, P.O. Box 45195-313, Zanjan, Iran

    Mohammad Mahmoudi

  3. Institute for Advanced Studies in Basic Sciences, P.O. Box 45195-159, Zanjan, Iran

    M. R. H. Khajehpour

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  1. Ali Mortezapour
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Mortezapour, A., Mahmoudi, M. & Khajehpour, M.R.H. Atom–photon, two-mode entanglement and two-mode squeezing in the presence of cross-Kerr nonlinearity. Opt Quant Electron 47, 2311–2329 (2015). https://doi.org/10.1007/s11082-014-0109-7

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