论文标题
增强的两参数相位空间置换估计接近耗散相变
Enhanced Two-Parameter Phase-Space-Displacement Estimation Close to Dissipative Phase Transition
论文作者
论文摘要
我提出了一个基于驱动驱动性量子系统的量子传感器，以对两个表征相位空间位移的两个共轭变量进行联合估计。量子探针由具有两个水平原子和骨气模式的晶格系统组成，它们通过偶极耦合相互作用。相干动力学和骨气激发损失的耗散过程之间的相互作用导致表现出非分析行为的稳态。我表明，接近耗散相变的差异参数之一的灵敏度可以显着增强位移相位的大小。此外，我表明，这两个参数的测量不确定性的总和可以克服标准量子限制。
I propose a quantum sensor based on driven-dissipative quantum system for the joint estimation of two conjugated variables characterizing the phase space displacement. The quantum probe consists of lattice system with two level atoms and bosonic modes which interact via dipolar coupling. Interplay between the coherent dynamics and dissipative processes of losses of bosonic excitations leads to a steady state which exhibits a non-analytical behaviour. I show that close to the dissipative phase transition the sensitivity of one of the conjugated parameters either the magnitude of the phase of the displacement can be significantly enhanced. Moreover, I show that the sum of the measurement uncertainties of the two parameters can overcome the standard quantum limit.
