Results 21 to 30 of about 161,407 (287)

Automatic differentiable numerical renormalization group

Physical 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

ON SPECTRAL RENORMALIZATION GROUP [PDF]

Reviews in Mathematical Physics, 2009
The operator-theoretic renormalization group (RG) methods are powerful analytic tools to explore spectral properties of field-theoretical models such as quantum electrodynamics (QED) with non-relativistic matter. In this paper, these methods are extended and simplified.
Israel Michael Sigal, Jürg Fröhlich, Jürg Fröhlich, Marcel Griesemer   +3 more
openaire   +4 more sources

Neural Monte Carlo renormalization group

Physical 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

Renormalization group therapy [PDF]

Physical Review D, 2007
We point out a general problem with the procedures commonly used to obtain improved actions from MCRG decimated configurations. Straightforward measurement of the couplings from the decimated configurations, by one of the known methods, can result into actions that do not correctly reproduce the physics on the undecimated lattice.
A. Velytsky, E. T. Tomboulis
openaire   +3 more sources

Ward-constrained melonic renormalization group flow

Physics Letters B, 2020
In recent years, interesting investigations of the nonperturbative renormalization group equations for tensorial group field theories have been performed in the truncation method, while completely discarding the Ward identities from their analysis.
Vincent Lahoche, Dine Ousmane Samary
doaj   +1 more source

Phenomenological Renormalization Group Methods [PDF]

, 1999
Some renormalization group approaches have been proposed during the last few years which are close in spirit to the Nightingale phenomenological procedure. In essence, by exploiting the finite size scaling hypothesis, the approximate critical behavior of
Figueiredo, W., Grandi, B. C. S., Plascak, J. A.   +2 more
core   +3 more sources

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

, 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, A. McKane, A.J. McKane, C. De Dominicis, C. Greiner, C. Wetterich, D. Boyanovsky, D. Forster, D. Hochberg, D. Hochberg, D. O’Connor, D. O’Connor, D.A.R. Dalvit, E. Calzetta, E. Calzetta, E. Calzetta, E. Calzetta, E. Calzetta, E. Calzetta, E. Frey, E. Hopf, E. Medina, E.A. Calzetta, E.A. Calzetta, Esteban Calzetta, F. Cooper, F. Lombardo, F.J. Wegner, G. Zhou, H. van Beijeren, H. van Hees, H.K. Janssen, J. IIiopoulos, J. Krug, J. Schwinger, J.B. Hartle, J.D. Cole, J.E. Lidsey, Juan Zanella, K.J. Wiese, K.J. Wiese, L.-Y. Chen, L.-Y. Chen, L.V. Keldysh, M. Kardar, M. Kardar, M. Morikawa, P.C. Hohenberg, P.C. Martin, R. Feynman, R. Jackiw, S.F. Shandarin, S.K. Ma, T. Kunihiro, T. Kunihiro, V.S. L’vov, Y. Zhou   +56 more
core   +2 more sources

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

Journal 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

Asymptotic freedom and higher derivative gauge theories

Journal 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

The Holographic Renormalization Group [PDF]

Fortschritte 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   +5 more sources