Oscillating scalar dissipating in a medium

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00554711" target="_blank" >RIV/68378271:_____/21:00554711 - isvavai.cz</a>
Result on the web
<a href="http://hdl.handle.net/11104/0329373" target="_blank" >http://hdl.handle.net/11104/0329373</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/JHEP11(2021)160" target="_blank" >10.1007/JHEP11(2021)160</a>

Result language
angličtina
Original language name
Oscillating scalar dissipating in a medium
Original language description
We study how oscillations of a scalar field condensate are damped due to dissipative effects in a thermal medium. Our starting point is a non-linear and non-local condensate equation of motion descending from a 2PI-resummed effective action derived in the Schwinger-Keldysh formalism appropriate for non-equilibrium quantum field theory. We solve this non-local equation by means of multiple-scale perturbation theory appropriate for time-dependent systems, obtaining approximate analytic solutions valid for very long times. The non-linear effects lead to power-law damping of oscillations, that at late times transition to exponentially damped ones characteristic for linear systems.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10303 - Particles and field physics

Project
<a href="/en/project/GA20-28525S" target="_blank" >GA20-28525S: Strong Gravity as a Microscope for the Dark Universe</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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