论文标题
通过在耗散耦合系统中通过同源检测来增强非线性传感器的灵敏度
Enhancing the sensitivity of nonlinearity sensors through homodyne detection in dissipatively coupled systems
论文作者
论文摘要
在本手稿中，我们提出了一种新的感应机制，以通过使腔场的振幅正交正同化，从而增强量子系统对非线性的敏感性。该系统由两个散发耦合的腔模式组成，其中一种由单光驱动器和两光驱动器组成。在低两个光子驾驶强度的状态下，系统的光谱获得了真正的光谱奇异性。我们发现，这种奇异性对系统的两光驱动和非线性非常敏感，并且与先前的非线性传感器相比，所提出的传感器实现了围绕奇异点的前所未有的灵敏度。此外，该方案对制造缺陷是可靠的。这项工作将为量子传感器打开新的途径，该量子可以在许多领域中找到应用，例如精确的测量和量子计量学。
In this manuscript, we propose a new sensing mechanism to enhance the sensitivity of a quantum system to nonlinearities by homodyning the amplitude quadrature of the cavity field. The system consists of two dissipatively coupled cavity modes, one of which is subject to single- and two-photon drives. In the regime of low two-photon driving strength, the spectrum of the system acquires a real spectral singularity. We find that this singularity is very sensitive to the two-photon drive and nonlinearity of the system, and compared to the previous nonlinearity sensor, the proposed sensor achieves an unprecedented sensitivity around the singularity point. Moreover, the scheme is robust against fabrication imperfections. This work would open a new avenue for quantum sensors, which could find applications in many fields, such as the precise measurement and quantum metrology.
