| Weekly Seminars for July 2018 |
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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.
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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 |