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NCUEIR > College of Science > Department of Physics > Periodical Articles > Item 987654321/14333

Please use this identifier to cite or link to this item: http://ir.ncue.edu.tw/ir/handle/987654321/14333

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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