论文标题
通过单量子探针歧视热浴
Discrimination of thermal baths by single qubit probes
论文作者
论文摘要
与热浴接触的量子系统的非平衡状态有助于以不同的温度或不同统计数据分开来讲述环境。我们将这些研究扩展到一个更通用的问题，该问题包括在不等温度下区分有不同成分的两个浴室。值得注意的是，存在温度状态，在初始状态制备中存在相干性对歧视能力有益。我们还发现，非平衡状态并不是普遍的最佳状态，并详细介绍了等待探针完全热的方便的条件。这些概念在线性光学模拟中进行了说明。
Non-equilibrium states of quantum systems in contact with thermal baths help telling environments with different temperatures or different statistics apart. We extend these studies to a more generic problem that consists in discriminating between two baths with disparate constituents at unequal temperatures. Notably there exist temperature regimes in which the presence of coherence in the initial state preparation is beneficial for the discrimination capability. We also find that non-equilibrium states are not universally optimal, and detail the conditions in which it becomes convenient to wait for complete thermalisation of the probe. These concepts are illustrated in a linear optical simulation.
