Results 21 to 30 of about 855,445 (292)
Ghostbusters: unitarity and causality of non-equilibrium effective field theories [PDF]
Journal of High Energy Physics, 2020 Abstract: For a non-equilibrium physical system defined along a closed time path (CTP), a key constraint is the so-called largest time equation, which is a consequence of unitarity and implies causality. In this paper, we present a simple proof that if the propagators of a non-equilibrium effective action have the proper pole structure, the largest ...
Ping Gao, Paolo Glorioso, Hong Liu
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Journal of High Energy Physics, 2023 In this study, we further the thermodynamic bootstrap program which involves a set of recently developed ideas used to determine thermodynamic form factors of local operators in integrable quantum field theories. These form factors are essential building
Miłosz Panfil, Robert M. Konik
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Dissipation in equations of motion of scalar fields [PDF]
, 2002 The methods of non-equilibrium quantum field theory are used to investigate the possibility of representing dissipation in the equation of motion for the expectation value of a scalar field by a friction term, such as is commonly included in ...
A. Albrecht +26 more
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Entanglement negativity and entropy in non-equilibrium conformal field theory
Nuclear Physics B, 2015 We study the dynamics of the entanglement in one-dimensional critical quantum systems after a local quench in which two independently thermalized semi-infinite halves are joined to form a homogeneous infinite system and left to evolve unitarily.
Marianne Hoogeveen, Benjamin Doyon
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Thermal three-point functions from holographic Schwinger-Keldysh contours
Journal of High Energy Physics, 2023 We compute fully retarded scalar three-point functions of holographic CFTs at finite temperature using real-time holography. They describe the nonlinear response of a holographic medium under scalar forcing, and display single and higher-order poles ...
Christiana Pantelidou, Benjamin Withers
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Renormalized field theory for non-equilibrium systems
La Rivista del Nuovo CimentoPeer ...
Antonov, Nikolay V. +5 more
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An intuitive construction of modular flow
Journal of High Energy Physics, 2023 The theory of modular flow has proved extremely useful for applying thermodynamic reasoning to out-of-equilibrium states in quantum field theory. However, the standard proofs of the fundamental theorems of modular flow use machinery from Fourier analysis
Jonathan Sorce
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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
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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.
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The out-equilibrium 2D Ising spin glass: almost, but not quite, a free-field theory [PDF]
, 2018 We consider the spatial correlation function of the two-dimensional Ising spin glass under out-equilibrium conditions. We pay special attention to the scaling limit reached upon approaching zero temperature.
Fernandez, L. A. +4 more
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