論文

査読有り
2016年7月

Vacuum excitation by sudden appearance and disappearance of a Dirichlet wall in a cavity

PHYSICAL REVIEW D
  • Tomohiro Harada
  • ,
  • Shunichiro Kinoshita
  • ,
  • Umpei Miyamoto

94
2
開始ページ
025006
終了ページ
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevD.94.025006
出版者・発行元
AMER PHYSICAL SOC

Vacuum excitation by time-varying boundary conditions is not only of fundamental importance but also has recently been confirmed in a laboratory experiment. In this paper, we study the vacuum excitation of a scalar field by the instantaneous appearance and disappearance of a two-sided Dirichlet wall in the middle of a one-dimensional cavity, as toy models of bifurcating and merging spacetimes, respectively. It is shown that the energy flux emitted positively diverges on the null lines emanating from the appearance and disappearance events, which is analogous to the result of Anderson and DeWitt. This result suggests that the semiclassical effect prevents the spacetime both from bifurcating and merging. In addition, we argue that the diverging flux in the disappearance case plays an interesting role to compensate for the low ambient energy density after the disappearance, which is lower than the zero-point level.


リンク情報
DOI
https://doi.org/10.1103/PhysRevD.94.025006
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000379722800020&DestApp=WOS_CPL
URL
http://www.scopus.com/inward/record.url?eid=2-s2.0-84978419607&partnerID=MN8TOARS
ID情報
  • DOI : 10.1103/PhysRevD.94.025006
  • ISSN : 2470-0010
  • eISSN : 2470-0029
  • ORCIDのPut Code : 25712419
  • SCOPUS ID : 84978419607
  • Web of Science ID : WOS:000379722800020

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