Volume 123, Number 1, July 2018
|Number of page(s)||7|
|Section||Electromagnetism, Optics, Acoustics, Heat Transfer, Classical Mechanics, and Fluid Dynamics|
|Published online||17 August 2018|
Ground-state cooling in cavity optomechanics with unresolved sidebands
1 Department of Physics, Faculty of Science, Taibah University - P. O. Box 30002, Madinah, Saudi Arabia
2 Physics Department, College of Science, Al Imam Mohammad ibn Saud Islamic University (IMSIU) P.O. Box 90950, Riyadh 11623, Saudi Arabia
Received: 4 June 2018
Accepted: 17 July 2018
We consider a simple cavity optomechanics and study the ground-state cooling of mechanical resonator in the quantum regime. Using the effective master equations in the linear regime, the equations of motion can be obtained for the second-order moments. The steady-state solutions are derived in the case where the antiresonant terms are ignored. The final mean value of phonon number is compared to the case where the antiresonant terms are included. We find that the ground-state cooling in the last case is improved. Indeed, the inclusion of the antiresonant terms makes the system able to generate a squeezed field, which is required for enhancing cooling. The variances of the resultant field are presented. Analytic calculations are presented in some appropriate regimes. Then our analytic predictions are confirmed with numerical calculations.
PACS: 42.50.Wk – Mechanical effects of light on material media, microstructures and particles / 42.50.Lc – Quantum fluctuations, quantum noise, and quantum jumps / 42.50.Ct – Quantum description of interaction of light and matter; related experiments
© EPLA, 2018
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