Expanding cosmology with back reaction term caused by quantum particle creation

2014 ◽  
Vol 8 ◽  
pp. 577-587
Author(s):  
Antonio Zecca
Keyword(s):  
Quantum Particle ◽  
Particle Creation ◽  
Back Reaction ◽  
Reaction Term

Quantum particle creation (Hawking effect) in nonstationary black holes

1976 ◽  
Vol 29 (2) ◽  
pp. 1012-1021 ◽  
Author(s):  
I. V. Volovich ◽  
V. A. Zagrebnov ◽  
V. P. Frolov
Keyword(s):  
Black Holes ◽  
Quantum Particle ◽  
Particle Creation ◽  
Hawking Effect

scholarly journals QUANTUM SPINOR FIELD IN THE FRW UNIVERSE WITH A CONSTANT ELECTROMAGNETIC BACKGROUND

2001 ◽  
Vol 16 (26) ◽  
pp. 4235-4259 ◽  
Author(s):  
S. P. GAVRILOV ◽  
D. M. GITMAN ◽  
A. E. GONÇALVES
Keyword(s):  
Spinor Field ◽  
Proper Time ◽  
Particle Creation ◽  
Transition Amplitude ◽  
Momentum Tensor ◽  
Back Reaction ◽  
Frw Universe ◽  
Mean Values ◽  
Constant Electromagnetic Field ◽  
Massive Spinor

This paper is a natural continuation of our paper Quantum Scalar Field in FRW Universe with Constant Electromagnetic Background, Int. J. Mod. Phys.A12, 4837 (1997). We generalize our previous work to the case of a massive spinor field, which is placed in a FRW universe of a special type with a constant electromagnetic field. So as to achieve this, special sets of exact solutions of the Dirac equation in the background under consideration are constructed and classified. Using these solutions representations for out–in, in–in, and out–out spinor Green functions are explicitly constructed as proper-time integrals over the corresponding contours in the complex proper-time plane. The vacuum-to-vacuum transition amplitude and the number of created particles are found and vacuum instability is discussed. The mean values of the current and of the energy–momentum tensor are evaluated, and different approximations for them are presented. The back reaction related to particle creation and to unstable vacuum polarization is estimated in different regimes.

scholarly journals THE KINETIC DESCRIPTION OF VACUUM PARTICLE CREATION IN THE OSCILLATOR REPRESENTATION

2005 ◽  
Vol 20 (24) ◽  
pp. 5689-5704 ◽  
Author(s):  
V. N. PERVUSHIN ◽  
V. V. SKOKOV ◽  
A. V. REICHEL ◽  
S. A. SMOLYANSKY ◽  
A. V. PROZORKEVICH
Keyword(s):  
Electric Fields ◽  
Particle Creation ◽  
Time Dependent ◽  
Back Reaction ◽  
Free Electron Lasers ◽  
Quantum Kinetic Equation ◽  
Oscillator Representation ◽  
X Ray ◽  
Electron Positron ◽  
Reaction Problem

The oscillator representation is used for the nonperturbative description of vacuum particle creation in a strong time-dependent electric field in the framework of scalar QED. It is shown that the method can be more effective for the derivation of the quantum kinetic equation (KE) in comparison with the Bogoliubov method of time-dependent canonical transformations. This KE is used for the investigation of vacuum creation in periodical linear and circular polarized electric fields and also in the case of the presence of a constant magnetic field, including the back reaction problem. In particular, these examples are applied for a model illustration of some features of vacuum creation of electron–positron plasma within the planned experiments on the X-ray free electron lasers.

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