Results 31 to 40 of about 853,943 (289)
Dissipation of oscillating scalar backgrounds in an FLRW universe
Journal of High Energy Physics, 2022 We study the dissipation of oscillating scalar backgrounds in a spatially flat Friedmann-Lemaître-Robertson-Walker universe using non-equilibrium quantum field theory.
Zi-Liang Wang, Wen-Yuan Ai
doaj +1 more source
Energy flow in non-equilibrium conformal field theory [PDF]
Journal of Physics A: Mathematical and Theoretical, 2012 v1: 5 pages. v2: 9 pages (published version)
Bernard, Denis, Doyon, Benjamin
openaire +4 more sources
Real-time diagram technique for instantonic systems
Journal of High Energy Physics, 2023 The Schwinger-Keldysh diagram technique is usually involved in the calculation of real-time in-in correlation functions. In the case of a thermal state, one can analytically continue imaginary-time Matsubara correlation functions to real times ...
Nikita Kolganov
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Problems of perturbation series in non-equilibrium quantum field theories [PDF]
Physics Letters B, 1994 In the standard framework of non-equilibrium quantum field theories, the pinch singularities associated to multiple products of $ $-functions do not cancel in a perturbative expansion unless the particle distributions are those for a system in thermal and chemical equilibrium.
Altherr, T., Seibert, D.
openaire +2 more sources
Mean Field Theory For Non-Equilibrium Network Reconstruction
, 2011 There has been recent progress on the problem of inferring the structure of interactions in complex networks when they are in stationary states satisfying detailed balance, but little has been done for non-equilibrium systems.
Hertz, John A., Roudi, Yasser
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Effective field theory out of equilibrium: Brownian quantum fields
New Journal of Physics, 2015 The emergence of an effective field theory out of equilibrium is studied in the case in which a light field—the system—interacts with very heavy fields in a finite temperature bath.
D Boyanovsky
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Time evolution of correlation functions in non-equilibrium field theories [PDF]
Physics Letters B, 1998 We investigate the non-equilibrium properties of an N-component scalar field theory. The time evolution of the correlation functions for an arbitrary ensemble of initial conditions is described by an exact functional differential equation. In leading order in the 1/N expansion the system can be understood in terms of infinitely many conserved ...
Bettencourt, Luis M. A. +1 more
openaire +2 more sources
Quantum critical phase of FeO spans conditions of Earth’s lower mantle
Nature CommunicationsSeismic and mineralogical studies have suggested regions at Earth’s core-mantle boundary may be highly enriched in FeO, reported to exhibit metallic behavior at extreme pressure-temperature (P–T) conditions.
Wai-Ga D. Ho +5 more
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Interpretation and resolution of pinch singularities in non-equilibrium quantum field theory [PDF]
, 1998 Ill-defined pinch singularities arising in a perturbative expansion in out of equilibrium quantum field theory have a natural analogue to standard scattering theory. We explicitly demonstrate that the occurrence of such terms is directly related to Fermi'
Greiner, Carsten, Leupold, Stefan
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Time after time – circadian clocks through the lens of oscillator theory
FEBS Letters, EarlyView.Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo +2 more
wiley +1 more source