Equal-time approach to real-time dynamics of quantum fields
We employ the equal-time formulation of quantum field theory to derive effective kinetic theories, first for a weakly coupled non-relativistic Bose gas, and then for a strongly correlated system of self-interacting N-component fields. Our results provide the link between state-of-the-art measurement...
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| Main Authors: | , , |
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| Format: | Article (Journal) Chapter/Article |
| Language: | English |
| Published: |
13 Apr 2022
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| In: |
Arxiv
Year: 2022, Pages: 1-18 |
| DOI: | 10.48550/arXiv.2204.06463 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.48550/arXiv.2204.06463 Verlag, lizenzpflichtig, Volltext: http://arxiv.org/abs/2204.06463 
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| Author Notes: | Robert Ott, Torsten V. Zache, and Jürgen Berges |
| Summary: | We employ the equal-time formulation of quantum field theory to derive effective kinetic theories, first for a weakly coupled non-relativistic Bose gas, and then for a strongly correlated system of self-interacting N-component fields. Our results provide the link between state-of-the-art measurements of equal-time effective actions using quantum simulator platforms, as employed in Refs. [1, 2], and observables underlying effective kinetic or hydrodynamic descriptions. New non-perturbative approximation schemes can be developed and certified this way, where the a priori time-local formulation of the equal-time effective action has crucial advantages over the conventional closed-time-path approach which is non-local in time. |
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| Item Description: | Gesehen am 17.10.2022 |
| Physical Description: | Online Resource |
| DOI: | 10.48550/arXiv.2204.06463 |