Equal-time approach to real-time dynamics of quantum fields

• Verfasst von: Ott, Robert [VerfasserIn]
• Verfasst von: Zache, Torsten Victor [VerfasserIn]
• Verfasst von: Berges, Jürgen [VerfasserIn]
• Titel: Equal-time approach to real-time dynamics of quantum fields
• Verf.angabe: R. Ott, T.V. Zache, and J. Berges
• E-Jahr: 2022
• Jahr: 13 Apr 2022
• Umfang: 18 S.
• Fussnoten: Gesehen am 20.09.2022
• Titel Quelle: Enthalten in: De.arxiv.org
• Ort Quelle: [S.l.] : Arxiv.org, 1991
• Jahr Quelle: 2022
• Band/Heft Quelle: (2022), Artikel-ID 2204.06463, Seite 1-18
• DOI: doi:10.48550/arXiv.2204.06463
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: Condensed Matter - Quantum Gases
• Sach-SW: High Energy Physics - Theory
• Sach-SW: Quantum Physics
• K10plus-PPN: 1808034805

Abstract

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.