Abstract
In this paper, we study an optomechanical device consisting of a Fabry-Pérot cavity with two dielectric nanospheres trapped near the cavity mirrors by an external driving laser. In the condition where the distances between the nanospheres and cavity mirrors are small enough, the Casimir force helps the optomechanical coupling to induce a steady-state optomechanical entanglement of the mechanical and optical modes in a certain regime of parameters. We investigate in detail the dependence of the steady-state optomechanical entanglement on external control parameters of the system, i.e., the effective detuning, the pump powers of the cavity, the cavity decay rate and the wavelength of the driving field. It is found that the large steady-state optomechanical entanglement, i.e. E N = 5.76, can be generated with experimentally feasible parameters, i.e. the pump power P = 18.2 μW, the cavity decay rate κ = 0.5 MHz and the wavelength of the laser λL=1064 nm, which should be checked by optical measurement.
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Nie, W., Lan, Y., Li, Y. et al. Generating large steady-state optomechanical entanglement by the action of Casimir force. Sci. China Phys. Mech. Astron. 57, 2276–2284 (2014). https://doi.org/10.1007/s11433-014-5580-4
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DOI: https://doi.org/10.1007/s11433-014-5580-4