Unruh radiation produced by a uniformly accelerating charged particle coupled to vacuum fluctuations ∗

Naritaka Oshita, Kazuhiro Yamamoto, Sen Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A particle in a uniformly accelerated motion exhibits Brownian random motions around the classical trajectory due to the coupling to the field vacuum fluctuations. Previous works show that the Brownian random motions satisfy the energy equipartition relation. Because this thermal property is understood as the consequence of the Unruh effect, this quantum radiation is termed Unruh radiation. We investigate the properties of Unruh radiation produced by a uniformly accelerating particle undergoing thermal random motions, which originate from the coupling to the vacuum fluctuations of a massless scalar field as well as an electromagnetic field. The energy flux of Unruh radiation is negative and smaller than that of Larmor radiation by one order in a/m, where a is the constant acceleration and m is the mass of the particle. Thus, the Unruh radiation appears to be a suppression of the classical Larmor radiation. The result is consistent with the previous studies on the quantum effect on the Larmor radiation.

Original languageEnglish
Title of host publicationProceedings of the 25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015
PublisherKyoto University, Yukawa Institute for Theoretical Physics
Pages1385-1396
Number of pages12
ISBN (Electronic)9780000000002
Publication statusPublished - 2015
Externally publishedYes
Event25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015 - Kyoto, Japan
Duration: Dec 7 2015Dec 11 2015

Publication series

NameProceedings of the 25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015
Volume5

Conference

Conference25th Workshop on General Relativity and Gravitation in Japan, JGRG 2015
CountryJapan
CityKyoto
Period12/7/1512/11/15

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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