论文标题
嘈杂的量子陀螺仪
Noisy quantum gyroscope
论文作者
论文摘要
旋转传感的陀螺仪在惯性导航系统中起关键作用。与使用量子资源相比,与传统的陀螺仪更加精确的陀螺仪吸引了很多关注。然而,现有的量子陀螺仪方案在变质的影响下遭受严重恶化,这被称为噪声计量学定理。在这里,通过将两个量化的光场作为量子探针,我们提出了一种量子陀螺仪方案,该方案通过无关定理的约束。我们对非马克维亚噪声的确切分析表明,在无噪声情况下,当每个光场均与其环境形成一个界面状态时,在无噪声情况下,进化时间是增强灵敏度和所达到的超生命的限制的资源。结果为实现现实噪声环境中的高精度旋转感测提供了指南。
Gyroscope for rotation sensing plays a key role in inertial navigation systems. Developing more precise gyroscopes than the conventional ones bounded by classical shot-noise limit by using quantum resources has attracted much attention. However, existing quantum gyroscope schemes suffer severe deterioration under the influence of decoherence, which is called the no-go theorem of noisy metrology. Here, by using two quantized optical fields as quantum probe, we propose a quantum gyroscope scheme breaking through the constraint of the no-go theorem. Our exact analysis of the non-Markovian noise reveals that both the evolution time as a resource in enhancing the sensitivity and the achieved super-Heisenberg limit in the noiseless case are asymptotically recoverable when each optical field forms a bound state with its environment. The result provides a guideline for realizing high-precision rotation sensing in realistic noisy environments.