Wang Dong-Yang, Bai Cheng-Hua, Liu Shutian, Zhang Shou, Wang Hong-Fu
Opt Express. 2020 Sep 28;28(20):28942-28953. doi: 10.1364/OE.399687.
The dissipative squeezing mechanism is an effective method to generate the strong squeezing, which is important in the precision metrology. Here, we propose a practical method to achieve arbitrary bosonic squeezing via introducing frequency modulation into the coupled harmonic resonator model. We analyze the effect of frequency modulation and give the analytical and numerical squeezing results, respectively. To measure the accurate dynamic squeezing in our proposal, we give a more general defination of the relative squeezing degree. Finally, the proposed method is extended to generate the strong mechanical squeezing (>3 dB) in a practical optomechanical system consisting of a graphene mechanical oscillator coupled to a superconducting microwave cavity. The result indicates that the strong mechanical squeezing can be effectively achieved even when the mechanical oscillator is not initially in its ground state. The proposed method expands the study on nonclassical state and does not need the bichromatic microwave driving technology.
耗散压缩机制是产生强压缩的一种有效方法，这在精密计量中很重要。在此，我们提出一种通过在耦合谐波谐振器模型中引入频率调制来实现任意玻色子压缩的实用方法。我们分析了频率调制的效果，并分别给出了解析和数值压缩结果。为了在我们的方案中测量精确的动态压缩，我们给出了相对压缩度更一般的定义。最后，所提出的方法被扩展到在由耦合到超导微波腔的石墨烯机械振子组成的实际光机械系统中产生强机械压缩（>3 dB）。结果表明，即使机械振子最初不在其基态，也能有效地实现强机械压缩。所提出的方法扩展了对非经典态的研究，并且不需要双色微波驱动技术。
