论文标题
开放系统的量子感应：估计阻尼常数和温度
Quantum sensing of open systems: Estimation of damping constants and temperature
论文作者
论文摘要
我们确定量子精度限制，以估计阻尼常数和失去的骨通道温度。直接应用将是使用光估计透明板的吸收和温度。通过纯化过程，可以通过涉及系统和临时环境的单一进化来代替估计中的不确定性分析性下限。对于零温度，表明FOCK状态会导致阻尼估计的最小不确定性，而玻色子计数是最佳测量程序。在阻尼和温度估计中，通过一系列单个玻色子流进行顺序的预热量测量，可能会导致精确幅度巨大。
We determine quantum precision limits for estimation of damping constants and temperature of lossy bosonic channels. A direct application would be the use of light for estimation of the absorption and the temperature of a transparent slab. Analytic lower bounds are obtained for the uncertainty in the estimation, through a purification procedure that replaces the master equation description by a unitary evolution involving the system and ad hoc environments. For zero temperature, Fock states are shown to lead to the minimal uncertainty in the estimation of damping, with boson-counting being the best measurement procedure. In both damping and temperature estimates, sequential pre-thermalization measurements, through a stream of single bosons, may lead to huge gain in precision.
