Results 21 to 30 of about 161,256 (270)

Automatic differentiable numerical renormalization group

open access: yesPhysical Review Research, 2022
Machine learning techniques have recently gained prominence in physics, yielding a host of new results and insights. One key concept is that of backpropagation, which computes the exact gradient of any output of a program with respect to any input.
Jonas B. Rigo, Andrew K. Mitchell
doaj   +1 more source

Neural Monte Carlo renormalization group

open access: yesPhysical Review Research, 2021
The key idea behind the renormalization group (RG) transformation is that properties of physical systems with very different microscopic makeups can be characterized by a few universal parameters.
Jui-Hui Chung, Ying-Jer Kao
doaj   +1 more source

Asymptotic freedom and higher derivative gauge theories

open access: yesJournal of High Energy Physics, 2021
The ultraviolet completion of gauge theories by higher derivative terms can dramatically change their behavior at high energies. The requirement of asymptotic freedom imposes very stringent constraints that are only satisfied by a small family of higher ...
M. Asorey, F. Falceto, L. Rachwał
doaj   +1 more source

Local renormalization group functions from quantum renormalization group and holographic bulk locality [PDF]

open access: yes, 2015
The bulk locality in the constructive holographic renormalization group requires miraculous cancellations among various local renormalization group functions. The cancellation is not only from the properties of the spectrum but from more detailed aspects
Nakayama, Yu
core   +3 more sources

Towards general scalar-Yukawa renormalisation group equations at three-loop order

open access: yesJournal of High Energy Physics, 2021
For arbitrary four-dimensional quantum field theories with scalars and fermions, renormalisation group equations in the MS ¯ $$ \overline{\mathrm{MS}} $$ scheme are investigated at three-loop order in perturbation theory.
Tom Steudtner
doaj   +1 more source

Renormalization group and nonequilibrium action in stochastic field theory [PDF]

open access: yes, 2002
We investigate the renormalization group approach to nonequilibrium field theory. We show that it is possible to derive nontrivial renormalization group flow from iterative coarse graining of a closed-time-path action.
A. Berera   +56 more
core   +2 more sources

Renormalization group approach to spontaneous stochasticity

open access: yesPhysical Review Research, 2020
We develop a theoretical approach to “spontaneous stochasticity” in classical dynamical systems that are nearly singular and weakly perturbed by noise. This phenomenon is associated with a breakdown in the uniqueness of solutions for fixed initial data ...
Gregory L. Eyink, Dmytro Bandak
doaj   +1 more source

Quantum renormalization group [PDF]

open access: yesPhysical Review D, 2016
The observed IR and the spectator UV particles of a regulated, cutoff quantum field theory are entangled by their interactions; hence, the IR sector can be described by the help of the density matrix only. The tree-level renormalized trajectory is obtained for a self-interacting scalar field theory, containing the mixed state contributions. One needs a
Nagy, Sándor   +2 more
openaire   +4 more sources

Renormalization Group in Non-Relativistic Quantum Statistics [PDF]

open access: yesEPJ Web of Conferences, 2020
Dynamic behaviour of a boson gas near the condensation transition in the symmetric phase is analyzed with the use of an effective large-scale model derived from time-dependent Green functions at finite temperature.
Honkonen Juha   +4 more
doaj   +1 more source

The Holographic Renormalization Group [PDF]

open access: yesFortschritte der Physik, 2001
In this lecture, we review the derivation of the holographic renormalization group given in hep-th/9912012. Some extra background material is included, and various applications are discussed.
openaire   +4 more sources

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