arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2501.09264hep-thgr-qc
收藏

无事件视界的含时加速 Unruh-DeWitt 探测器

Time-dependent accelerated Unruh-DeWitt detector without event horizon

F. Sobrero, M. S. Soares, T. Guerreiro, N. F. Svaiter

AI总结:

本文通过比较 Unruh-DeWitt 与 Glauber 探测器模型,计算含时非均匀加速参考系中的正频 Wightman 函数和跃迁率,证明真空态下探测器仍可被热浴型关联激发。

摘要:

我们研究了量子场论中算子代数在存在对易关系 Fock 表示情形下的幺正不等价表示。我们更细致地考察了测量装置的操作性定义,讨论了量子探测器的 Unruh-DeWitt 模型和 Glauber 模型。我们评估了 Minkowski 时空中两种探测器在不同非惯性参考系下的单位固有时跃迁概率。我们首先研究沿具有恒定固有加速度的稳态世界线运动的探测器,即双曲运动,并与制备在 Poincaré 不变 Fock 真空态中的场相互作用。随后,我们研究静止于非均匀加速参考系中的 Unruh-DeWitt 探测器,其加速度随时间变化,并与处于 Poincaré 不变 Fock 真空态中的场相互作用。我们在有限时间区间内计算了非均匀加速参考系的正频 Wightman 函数,发现它类似于与热浴平衡的系统的两点关联函数。通过计算跃迁率,即使标量场被制备在真空态,非均匀加速的 Unruh-DeWitt 探测器也可以被激发。

英文摘要:

We investigate unitarily inequivalent representations of the algebra of operators in quantum field theory in the cases where there is a Fock representation of the commutation relations. We examine more closely the operational definition of a measurement device, discussing the Unruh-DeWitt and Glauber models of quantum detectors. The transition probability per unit of proper time of both detectors in different non-inertial frames of reference in Minkowski spacetime is evaluated. We first study detectors traveling in a stationary worldline with a constant proper acceleration, i.e., a hyperbolic motion, interacting with the field prepared in the Poincaré invariant Fock vacuum state. Next, we study the Unruh-DeWitt detector at rest in a non-uniformly accelerated frame, with a time dependent acceleration interacting with the field in the Poincaré invariant Fock vacuum state. We evaluate the positive frequency Wightman function for the non-uniformly accelerated frame in a finite time interval and find that it is similar to the two-point correlation function of a system in equilibrium with a thermal bath. Calculating the transition rate, the non-uniformly accelerated Unruh-DeWitt detector can be excited even if the scalar field is prepared in the vacuum state.

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。

↑