大学物理 ›› 2024, Vol. 43 ›› Issue (02): 23-.doi: 10.16854/j.cnki.1000-0712.230084

• 教学讨论 • 上一篇    下一篇

边界附近匀加速Unruh-DeWitt粒子探测器的响应

周文婷   

  1. 宁波大学 物理科学与技术学院,浙江 宁波315211
  • 收稿日期:2023-03-19 修回日期:2023-05-22 出版日期:2024-03-14 发布日期:2024-03-22
  • 作者简介:周文婷(1984 —),女,湖南长沙人,宁波大学物理学系副教授,博士,主要从事量子场论与引力理论研究工作. E-mail: zhouwenting@nbu.edu.cn
  • 基金资助:
    宁波大学教研项目(JYXMXZD2023069)资助

Response of a uniformly accelerated Unruh-DeWitt particle detector near a boundary

ZHOU Wen-ting   

  1. School of Physical Science and Technology, Ningbo University, Ningbo, Zhejiang 315211, China
  • Received:2023-03-19 Revised:2023-05-22 Online:2024-03-14 Published:2024-03-22

摘要: 本文采用含时微扰论计算了真空中平行于一块全反射导体板匀加速运动的Unruh-DeWitt粒子探测器的跃迁速率.通过将结果分别与无边界真空中静态和匀加速粒子探测器的跃迁速率进行对比,发现匀加速运动将引起边界附近基态粒子探测器自发激发、边界可能引起探测器跃迁速率的重要修正.

关键词: 匀加速运动, 真空电磁涨落, 电偶极相互作用, 洛伦兹变换, 瞬时惯性系

Abstract: With the time-dependent perturbation theory, we calculate the response rate of an Unruh-DeWitt particle detector, which is uniformly accelerated in vacuum along a trajectory parallel to a perfectly reflecting boundary. By comparing the results with their counterparts of a detector being inertial or uniformly accelerated in an unbounded vacuum, we discover that the uniformly accelerated motion may induce spontaneous excitation for a detector initially in its ground state, and the presence of the boundary may bring in significant revisions to the transition rates of the detector.


Key words: uniformly accelerated motion, vacuum electromagnetic fluctuations, dipole-dipole interaction, Lorentz transformation, instantaneously inertial frame.