论文标题
精确的声子封锁检测器由四耦合的光力系统组成
Accurate phonon blockade detector composed of a quadratically coupled optomechanical system
论文作者
论文摘要
在纳米力学振荡器中观察声子封锁是其量子性质的明确证据。但是，测量具有有效的非线性耦合的光力学系统中强的声子阻断仍然是一个严重的挑战。在本文中，我们提出了一项理论建议，用于通过利用监督的机器学习来检测二次耦合的光学机械系统中的声子封锁效果。将检测到的光学信号注入神经网络作为输入，而输出是机械相等的二阶相关性。我们的结果表明，我们的方案在检测声子封锁时表现出色。具体而言，它对于非线性耦合系统是有效的。它对强光子封锁表现高度精确；对于系统参数的微小干扰，它是可靠的。我们的工作开辟了一种有希望的方法来建立声子封锁检测器。
The observation of phonon blockade in a nanomechanical oscillator is clear evidence of its quantum nature. However, it is still a severe challenge to measure the strong phonon blockade in an optomechanical system with effective nonlinear coupling. In this paper, we propose a theoretical proposal for detecting the phonon blockade effect in a quadratically coupled optomechanical system by exploiting supervised machine learning. The detected optical signals are injected into the neural network as the input, while the output is the mechanical equal-time second-order correlation. Our results show our scheme performs superior performance on detecting phonon blockade. Specifically, it is efficient for nonlinear coupling systems; it performs a high precision for strong photon blockade; it is robust against the small disturbance of system parameters. Our work opens a promising way to build a phonon blockade detector.
