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Weekly Seminars for July 2018 Print E-mail
Tuesday July 24th, 2018 - 5:00pm
  ICRANet Pescara (Meeting room, 1st Floor)
 
ICRANet Seminar
 
 
 
Speaker: Sergio Andrés Vallejo Peña

Colombia

1. The effects of anisotropy and non-adiabaticity on the evolution of the curvature perturbation - https://arxiv.org/abs/1804.05005
2. The MESS of cosmological perturbations - https://arxiv.org/abs/1806.01941
.
 
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ICRANet Secretariat
ICRANet
Piazza della Repubblica 10
65122 Pescara (PE)
Italy
tel.: +39 085 23054200
fax: +39 085 4219252
email: secretariat@icranet.org
 
 
Tuesday July 24th, 2018 - 5:30pm
  ICRANet Pescara (Meeting room, 1st Floor)
 
ICRANet Seminar
 
 
 
Speaker: Mikalai Prakapenia

Institution: ICRANet-Minsk, Institute of Physics, NASB, Minsk, Belarus and Belarusian State University, Minsk, Belarus

Title: Thermalization of electron-positron plasma with quantum degeneracy​
 
Abstract:  
Non-equilibrium electron-positron-photon plasma thermalization process is studied using relativistic Boltzmann solver, taking into account quantum corrections both in non-relativistic and relativistic cases. Collision integrals are computed from exact QED matrix elements for all binary and triple interactions in the plasma. It is shown that in non-relativistic case binary interaction rates dominate over triple ones, resulting in establishment of kinetic equilibrium prior to final relaxation towards thermal equilibrium, in agreement with previous studies. On the contrary, in relativistic case triple interaction rates are fast enough to prevent establishment of kinetic equilibrium. It is shown that thermalization process strongly depends on quantum degeneracy in initial state, but does not depend on plasma composition.
 
*************************************************
ICRANet Secretariat
ICRANet
Piazza della Repubblica 10
65122 Pescara (PE)
Italy
tel.: +39 085 23054200
fax: +39 085 4219252
email: secretariat@icranet.org
 
 

 
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