失谐力光系统中的光子-声子转换和基态冷却

研究由辐射压力引起Fabry-Perot力光腔中动力学行为.从力光系统哈密顿量出发,探讨在失谐条件下力光腔中量子现象.引入散射矩阵方案来论证光子和声子以有效并且可逆方转换.这对于光学光子和微械阵子之间量子态转变提供了一个可行方案.光声转变预着一可行量子光学器件.同我们用量子郎之万方法和主方程方法这两方法推导最声子占有数来研究械振子态冷却,并且对这两方法进行了参数比较.出在么条件下哪方法更实用.

Photon-phonon transfer and ground state cooling in detuning optomechanical cavity

Optomechanical dynamics induced by radiation pressure is investigated in Fabry-Perot cavity optomechanical system. We start from the Hamiltonian of the optomechanical system at the condition of detuned to study the quantum phenomenon in the optomechanical cavity. A scattering matrix formulation which demonstrates the converting photons to phonons in an efficient and reversible manner is introduced. This provides a feasible route towards quantum state transfer between optical photons and micromechanical resonators. The phonon-photon transfer maybe suggests a possible quantum optical device. Meanwhile, two methods which are quantum Langevin approximate and a master-equation approach are considered to investigate the ground state cooling, and we compare the two methods. Our results showed which scheme is practical under what conditions.