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Enhancement of photon–phonon entanglement transfer in optomechanics

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Abstract

In this work, we propose a theoretical scheme to enhance stationary entanglement of the mechanical modes of two Fabry–Pérot cavities via broadband squeezed light. We employ the rotating wave approximation, and we consider the adiabatic and nonadiabatic regimes in the situation where a parametric amplifier is placed inside each cavity. The logarithmic negativity is employed to quantify the amount of entanglement. Stationary entanglement is optimal for high value of squeezing parameter and for strong optomechanical coupling. We show that the stationary entanglement is fragile under thermal effects. We show that it is possible to enhance the quantum correlations between the two movable mirrors via tuned parametric amplifier. Besides, we show that the enhancement of the stationary entanglement is deeply related to the gain of the parametric amplifier, the bath temperature of the movable mirrors, the optomechanical cooperativity and the squeezing parameter. We find that the stationary entanglement of two movable mirrors is strong in the adiabatic regime in comparison with the nonadiabatic case.

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Authors and Affiliations

  1. Department of Physics, Ecole Normale Supérieure (ENS), Mohammed V University, Rabat, Morocco

    M. Amazioug

  2. LPHE-MS, Department of Physics, Faculty of Sciences, Mohammed V University, Rabat, Morocco

    M. Amazioug & B. Maroufi

  3. LPMC, Department of Physics, Faculty of Sciences Ben M’Sik, University Hassan II, Casablanca, Morocco

    B. Maroufi

  4. Department of Physics, Faculty of Sciences, University Ibn Tofail, Kenitra, Morocco

    M. Daoud

  5. Abdus Salam International Centre for Theoretical Physics, Strada Costiera, 11, 34151, Trieste, Italy

    M. Daoud

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  1. M. Amazioug
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Amazioug, M., Maroufi, B. & Daoud, M. Enhancement of photon–phonon entanglement transfer in optomechanics. Quantum Inf Process 19, 160 (2020). https://doi.org/10.1007/s11128-020-02655-z

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