Robust entanglement between a movable mirror and a cavity field system with an optical parametric amplifier
Department of Physics and Information Engineering, Huaihua
2 College of Physical Science and Mechanical Engineering, Jishou University, Jishou 416000, P.R. China
Received: 29 October 2012
Published online: 25 June 2013
Robust entanglement created between an optical cavity field mode and a macroscopic vibrating mirror with an optical parametric amplifier is shown. Increasing the gain of the optical parametric amplifier makes the line of the logarithmic negativity EN move to the range of the larger detuning and higher temperature. Such optomechanical entanglement can be generated even at room temperature with current experimental parameters. Compared with other proposals, we have considered the one-to-one correspondence between the detuning and the input power, which is reasonable with the fact that the mean shift of the cavity frequency is determined by the radiation pressure which is related to the input power. Such consideration may be valuable to current experiments.
Key words: Quantum Optics
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag 2013