Large-N kinetic theory for highly occupied systems

• Verfasst von: Walz, Roland [VerfasserIn]
• Verfasst von: Boguslavski, Kirill [VerfasserIn]
• Verfasst von: Berges, Jürgen [VerfasserIn]
• Titel: Large-N kinetic theory for highly occupied systems
• Verf.angabe: R. Walz, K. Boguslavski, and J. Berges
• E-Jahr: 2017
• Jahr: 30 Oct 2017
• Umfang: 20 S.
• Fussnoten: Identifizierung der Ressource nach: Last revised 27 Aug 2018 ; Gesehen am 08.12.2020
• Titel Quelle: Enthalten in: De.arxiv.org
• Ort Quelle: [S.l.] : Arxiv.org, 1991
• Jahr Quelle: 2017
• Band/Heft Quelle: (2017) Artikel-Nummer 1710.11146, 20 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: High Energy Physics - Phenomenology
• Sach-SW: Condensed Matter - Quantum Gases
• K10plus-PPN: 1565596374

Abstract

We consider an effective kinetic description for quantum many-body systems, which is not based on a weak-coupling or diluteness expansion. Instead, it employs an expansion in the number of field components N of the underlying scalar quantum field theory. We demonstrate that the large-N kinetic theory at next-to-leading order is able to describe important aspects of highly occupied systems, which are beyond standard perturbative kinetic approaches. We analyze the underlying quasiparticle dynamics and solve the large-N kinetic equation for a highly occupied system far from equilibrium. This allows us to compute universal self-similar properties at nonthermal fixed points, including the infrared scaling form of the distribution function.