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Title: New Insights into Uniformly Accelerated Detector in a Quantum Field
Authors: Lin, Shi-Yuun;Hu, B. L.
Contributors: 物理學系
Keywords: Unruh effect;Time-dependent perturbation theory;Radiation theory
Date: 2007
Issue Date: 2012-10-25T08:26:18Z
Publisher: SpringerLink
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.
Relation: Found. Phys., 37(4-5): 480-490
Appears in Collections:[Department of Physics] Periodical Articles

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