论文标题
在参数驱动的光力腔中冷却
Cooling in a parametrically driven optomechanical cavity
论文作者
论文摘要
我们获得了用于参数驱动的光力腔的主方程。我们使用更正确的耗散模型，该模型可以说明驾驶引起的准材料光谱的修改。当机械对象的固有频率围绕其平均值定期振荡时，使用Floquet Operators表示具有改进耗散模型的主方程。我们应用相应的主方程来对机械对象的激光冷却进行建模。使用绝热近似，可以获得机械振荡器激发次数的分析表达。我们发现，激发的数量可以低于非时代依赖性情况。我们的结果增加了机械对象的固有频率作为时间的函数而获得较低温度的可能性
We obtain a master equation for a parametrically driven optomechanical cavity. We use a more correct dissipation model that accounts for the modification of the quasienergy spectrum caused by the driving. When the natural frequency of the mechanical object oscillates periodically around its mean value, the master equation with the improved dissipation model is expressed using Floquet operators. We apply the corresponding master equation to model the laser cooling of the mechanical object. Using an adiabatic approximation, an analytical expression for the number of excitations of the mechanical oscillator can be obtained. We find that the number of excitations can be lower than in the non-time-dependent case. Our results raise the possibility of achieving lower temperatures for the mechanical object if its natural frequency can be controlled as a function of time
