论文标题
实现高精度测量的量子过滤器的直接方法
Direct approach to realising quantum filters for high-precision measurements
论文作者
论文摘要
量子噪声为高精度测量的灵敏度设定了一个基本限制。可以通过使用非经典状态和量子过滤器来抑制它，从而改变噪声和信号响应。我们发现了一种新的方法，可以直接从其频域传输功能中实现量子过滤器，利用量子控制群落开发的技术。它不仅允许我们构造无视直觉的量子过滤器，而且还为最佳量子测量设备的系统设计开辟了道路。作为例证，我们显示了具有异常分散的主动不稳定滤波器的新光学实现，该滤镜提出了用于改善重力波检测器的量子限制灵敏度。
Quantum noise sets a fundamental limit to the sensitivity of high-precision measurements. Suppressing it can be achieved by using non-classical states and quantum filters, which modify both the noise and signal response. We find a novel approach to realising quantum filters directly from their frequency-domain transfer functions, utilising techniques developed by the quantum control community. It not only allows us to construct quantum filters that defy intuition, but also opens a path towards the systematic design of optimal quantum measurement devices. As an illustration, we show a new optical realisation of an active unstable filter with anomalous dispersion, proposed for improving the quantum-limited sensitivity of gravitational-wave detectors.
