Variational principle for theories with dissipation from analytic continuation

• Verfasst von: Flörchinger, Stefan [VerfasserIn]
• Titel: Variational principle for theories with dissipation from analytic continuation
• Verf.angabe: Stefan Floerchinger, Institut für Theoretische Physik, Philosophenweg 16, D-69120 Heidelberg, Germany
• E-Jahr: 2016
• Jahr: 23 Mar 2016
• Umfang: 35 S.
• Fussnoten: Gesehen am 16.12.2020
• Titel Quelle: Enthalten in: De.arxiv.org
• Ort Quelle: [S.l.] : Arxiv.org, 1991
• Jahr Quelle: 2016
• Band/Heft Quelle: (2016) Artikel-Nummer 1603.07148, 35 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: General Relativity and Quantum Cosmology
• Sach-SW: High Energy Physics - Phenomenology
• Sach-SW: High Energy Physics - Theory
• K10plus-PPN: 1570639450

Abstract

The analytic continuation from the Euclidean domain to real space of the one-particle irreducible quantum effective action is discussed in the context of generalized local equilibrium states. Discontinuous terms associated with dissipative behavior are parametrized in terms of a conveniently defined sign operator. A generalized variational principle is then formulated, which allows to obtain causal and real dissipative equations of motion from the analytically continued quantum effective action. Differential equations derived from the implications of general covariance determine the space-time evolution of the temperature and fluid velocity fields and allow for a discussion of entropy production including a local form of the second law of thermodynamics.