论文标题
四耦合光学系统中的机械挤压
Mechanical Squeezing in Quadratically-coupled Optomechanical Systems
论文作者
论文摘要
我们通过引入驱动该系统的单色调激光器的振幅中引入定期调制，证明了在耗散的光学机械系统中产生强的机械挤压。机械振荡器通常耦合到光学模式，这有助于超过3 dB标准量子极限的强挤压。机械振荡器的Bogoliubov模式也由于边带冷却而冷却至其基态。我们进一步优化了边带强度的比率，以引入增强的挤压。我们还将结果与分析（在绝热近似）和确切的数值解决方案进行了比较。即使对于10^4个声子的热占用率，也可以观察到3 dB以上的机械挤压，并观察到强烈的光力纠缠。
We demonstrate the generation of a strong mechanical squeezing in a dissipative optomechanical system by introducing a periodic modulation in the amplitude of a single-tone laser driving the system. The mechanical oscillator is quadratically coupled to the optical mode, which contributes to a strong squeezing exceeding the 3-dB standard quantum limit. The Bogoliubov mode of the mechanical oscillator also cools down to its ground state due to sideband cooling. We further optimize this ratio of sideband strengths to introduce enhanced squeezing. We also compare our results with the analytical (under adiabatic approximation) and the exact numerical solution. Even for a thermal occupancy of 10^4 phonons, mechanical squeezing beyond 3 dB and a strong optomechanical entanglement is observed.
