New Insights into Uniformly Accelerated Detector in a Quantum Field |
| |
Authors: | Shih-Yuin Lin B L Hu |
| |
Institution: | (1) Institute of Physics, Academia Sinica, Nankang, Taipei, 11529, Taiwan;(2) Present address: Physics Division, National Center for Theoretical Sciences, P.O. Box 2-131, Hsinchu, 30013, Taiwan;(3) Department of Physics, University of Maryland, College Park, MD 20742-4111, USA |
| |
Abstract: | We obtained an exact solution for a uniformly accelerated Unruh–DeWitt detector interacting with a massless scalar field in
(3 + 1) dimensions which enables us to study the entire evolution of the total system, from the initial transient to late-time
steady state. We find that the conventional transition probability of the detector from its initial ground state to excited
states, as derived from time-dependent perturbation theory over an infinitely long duration of interaction, is valid only
in the transient stage and is invalid for cases with proper acceleration smaller than the damping constant. We also found
that, unlike in (1 + 1)D results, the (3 + 1)D uniformly accelerated Unruh– DeWitt detector in a steady state does emit a
positive radiated power of quantum nature at late-times, but it is not connected to the thermal radiance experienced by the
detector in the Unruh effect proper. |
| |
Keywords: | Unruh effect time-dependent perturbation theory radiation theory |
本文献已被 SpringerLink 等数据库收录! |
|