Non-thermal fixed points: universal dynamics far from equilibrium
In this article we give an overview of the concept of universal dynamics near non-thermal fixed points in isolated quantum many-body systems. We outline a non-perturbative kinetic theory derived within a Schwinger-Keldysh closed-time path-integral approach, as well as a low-energy effective field th...
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| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
23 October 2019
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| In: |
International journal of modern physics. A, Particles and fields, gravitation, cosmology
Year: 2019, Jahrgang: 34, Heft: 29 |
| ISSN: | 1793-656X |
| DOI: | 10.1142/S0217751X19410069 |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.1142/S0217751X19410069 Verlag, Volltext: https://www.worldscientific.com/doi/abs/10.1142/S0217751X19410069 
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| Verfasserangaben: | Christian-Marcel Schmied, Aleksandr N. Mikheev, Thomas Gasenzer |
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| 520 | |a In this article we give an overview of the concept of universal dynamics near non-thermal fixed points in isolated quantum many-body systems. We outline a non-perturbative kinetic theory derived within a Schwinger-Keldysh closed-time path-integral approach, as well as a low-energy effective field theory which enable us to predict the universal scaling exponents characterizing the time evolution at the fixed point. We discuss the role of wave-turbulent transport in the context of such fixed points and discuss universal scaling evolution of systems bearing ensembles of (quasi) topological defects. This is rounded off by the recently introduced concept of prescaling as a generic feature of the evolution towards a non-thermal fixed point. | ||
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