Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1997-03-17
Int.J.Mod.Phys.A12:4837-4868,1997
Physics
High Energy Physics
High Energy Physics - Theory
38 pages, LaTeX
Scientific paper
10.1142/S0217751X97002589
We discuss massive scalar field with conformal coupling in Friedmann-Robertson-Walker (FRW) Universe of special type with constant electromagnetic field. Treating an external gravitational-electromagnetic background exactly, at first time the proper-time representations for out-in, in-in, and out-out scalar Green functions are explicitly constructed as proper-time integrals over the corresponding (complex) contours. The vacuum-to-vacuum transition amplitudes and number of created particles are found and vacuum instability is discussed. The mean values of the current and energy-momentum tensor are evaluated, and different approximations for them are investigated. The back reaction of the particles created to the electromagnetic field is estimated in different regimes. The connection between proper-time method and effective action is outlined. The effective action in scalar QED in weakly-curved FRW Universe (De Sitter space) with weak constant electromagnetic field is found as derivative expansion over curvature and electromagnetic field strength. Possible further applications of the results are briefly mentioned.
Gavrilov Sergey P.
Gitman Dmitri M.
Odintsov Sergei D.
No associations
LandOfFree
Quantum scalar field in FRW Universe with constant electromagnetic background does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Quantum scalar field in FRW Universe with constant electromagnetic background, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Quantum scalar field in FRW Universe with constant electromagnetic background will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-196218