arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2003.12603quant-phgr-qc
收藏

加速度叠加时探测器的Unruh效应

Unruh effect for detectors in superposition of accelerations

Luis C. Barbado, Esteban Castro-Ruiz, Luca Apadula, Časlav Brukner

摘要:

Unruh效应是加速观察者即使在惯性观察者经历真空状态时也能检测到粒子的现象。特别是,均匀加速的观察者预计测量的热辐射是成比例的加速度。在这里,我们考虑的Unruh效应的检测器,遵循不同的加速轨迹在闵可夫斯基时空的量子叠加。更准确地说,我们分析了一个点状多级粒子探测器耦合到一个无质量的实标量场和运动的叠加加速轨迹的激发。我们发现,在一般情况下,探测器的激发状态,而不是仅仅(凸)的混合物的热谱特性的Unruh效应的每个轨迹与明确定义的加速度分别。相反,对于某些轨迹和激励水平,并且在测量轨迹状态时,检测器激励的状态特征还包括非对角项。这些“热态叠加”的非对角项与不同可能态的可解释性有关,在这些状态中,场在与探测器的内部自由度相互作用后被留下。

英文摘要:

The Unruh effect is the phenomenon that accelerated observers detect particles even when inertial observers experience the vacuum state. In particular, uniformly accelerated observers are predicted to measure thermal radiation that is proportional to the acceleration. Here we consider the Unruh effect for a detector that follows a quantum superposition of different accelerated trajectories in Minkowski spacetime. More precisely, we analyse the excitations of a pointlike multilevel particle detector coupled to a massless real scalar field and moving in the superposition of accelerated trajectories. We find that the state of the detector excitations is, in general, not a mere (convex) mixture of the thermal spectrum characteristics of the Unruh effect for each trajectory with well-defined acceleration separately. Rather, for certain trajectories and excitation levels, and upon the measurement of the trajectory state, the state of the detector excitations features in addition off-diagonal terms. The off-diagonal terms of these "superpositions of thermal states" are related to the distinguishability of the different possible states in which the field is left after its interaction with detector's internal degrees of the freedom.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑