论文标题
热，因果关系和量子控制的Unruh-Dewitt检测器
Thermality, causality and the quantum-controlled Unruh-deWitt detector
论文作者
论文摘要
粒子探测器模型（例如Unruh-Dewitt检测器）被广泛用于相对论量子信息和场理论，以探测时空和量子场的全局特征。这些探测器通常被建模为沿着古典世界的本地耦合。在本文中，我们利用了一个近期的框架，使我们能够在轨迹的量子对照叠加中准备探测器，并研究其对有限温度的Minkowski时空和不断扩展的Sitter Universe中对田地的反应。与无法区分这些空间的经典路径上的检测器不同，超phe的检测器可以通过获取有关其环境的几何和因果结构的非本地信息来做到这一点，从而证明了其能力作为这些全球性质的探测。
Particle detector models such as the Unruh-deWitt detector are widely used in relativistic quantum information and field theory to probe the global features of spacetime and quantum fields. These detectors are typically modelled as coupling locally to the field along a classical worldline. In this paper, we utilize a recent framework which enables us to prepare the detector in a quantum-controlled superposition of trajectories, and study its response to the field in finite-temperature Minkowski spacetime and an expanding de Sitter universe. Unlike a detector on a classical path which cannot distinguish these spacetimes, the superposed detector can do so by acquiring nonlocal information about the geometric and causal structure of its environment, demonstrating its capability as a probe of these global properties.
