Results 11 to 20 of about 6,390 (274)

Toward classical geometrodynamics from the group field theory hydrodynamics [PDF]

New Journal of Physics, 2011
revtex4, 32 pages. Contribution submitted to the focus issue of the New Journal of Physics on "Classical and Quantum Analogues for Gravitational Phenomena and Related Effects", R. Schuetzhold, U. Leonhardt and C.
Oriti, D., Sindoni, L.
openaire   +4 more sources

Dissipative spin hydrodynamics from quantum field theory

, 2022
The aim of this thesis is to provide a complete and consistent derivation of second-order dissipative relativistic spin hydrodynamics from quantum field theory. We will proceed in two main steps. The first one is the formulation of spin kinetic theory from quantum field theory using the Wigner-function formalism and performing an expansion in powers of
Weickgenannt, Nora
openaire   +3 more sources

Hydrodynamic effective field theories with discrete rotational symmetry

Journal of High Energy Physics, 2022
We develop a hydrodynamic effective field theory on the Schwinger-Keldysh contour for fluids with charge, energy, and momentum conservation, but only discrete rotational symmetry.
Xiaoyang Huang, Andrew Lucas
doaj   +3 more sources

DBI scalar field theory for QGP hydrodynamics [PDF]

Physical Review D, 2016
A way to describe the hydrodynamics of the quark-gluon plasma using a DBI action is proposed, based on the model found by Heisenberg for high energy scattering of nucleons. The expanding plasma is described as a shockwave in a DBI model for a real scalar standing in for the pion, and I show that one obtains a fluid description in terms of a ...
Nastase, Horatiu, Nastase, Horatiu [UNESP]   +1 more
openaire   +4 more sources

Hydrodynamics as v s → c

Journal of High Energy Physics
I present the simplest 3+1 dimensional quantum field theory for which the speed of sound can be arbitrarily close to the speed of light. Examining the hydrodynamics, I find cases where the shear viscosity is finite, but the “shear relaxation coefficient”
Guy D. Moore
doaj   +2 more sources

Viscosity and dissipative hydrodynamics from effective field theory [PDF]

Physical Review D, 2015
With the goal of deriving dissipative hydrodynamics from an action, we study classical actions for open systems, which follow from the generic structure of effective actions in the Schwinger-Keldysh Closed-Time-Path formalism with two time axes and a doubling of degrees of freedom.
Grozdanov, Saso, Polónyi, János
openaire   +4 more sources

Hydrodynamics: from effective field theory to holography

, 2014
Hydrodynamics is an effective theory that is extremely successful in describing a wide range of physical phenomena in liquids, gases and plasmas. However, our understanding of the structure of the theory, its microscopic origins and its behaviour at strong coupling is far from complete. To understand how an effective theory of dissipative hydrodynamics
Grozdanov, Saso, Starinets, Andrei O.
core   +5 more sources

Solitons in the generalized quantum hydrodynamics and the theory of lightning balls

Тонкие химические технологии, 2009
Quantum solitons are discovered with the help of generalized quantum hydrodynamics. The solitons have the character of the stable quantum objects in the self consistent electric field.
B. V. Alexeev
doaj   +1 more source

Hydrodynamic and non-hydrodynamic excitations in kinetic theory — a numerical analysis in scalar field theory

Journal of High Energy Physics, 2023
Abstract Viscous hydrodynamics serves as a successful mesoscopic description of the Quark-Gluon Plasma produced in relativistic heavy-ion collisions. In order to investigate, how such an effective description emerges from the underlying microscopic dynamics we calculate the hydrodynamic and non-hydrodynamic modes of linear response
Ochsenfeld, Stephan, Schlichting, Sören
openaire   +3 more sources

Thermalization and hydrodynamics of two-dimensional quantum field theories

SciPost Physics, 2022
We consider 2d QFTs as relevant deformations of CFTs in the thermodynamic limit. Using causality and KPZ universality, we place a lower bound on the timescale characterizing the onset of hydrodynamics. The bound is determined parametrically in terms of the temperature and the scale associated with the relevant deformation.
Delacretaz, Luca V., Fitzpatrick, A. Liam, Katz, Emanuel, Walters, Matthew T.   +3 more
openaire   +3 more sources