Results 211 to 220 of about 326,761 (366)

Regularization, renormalization, and renormalization groups [PDF]

open access: yes, 2011
This paper confronts renormalization used in quantum field theory and that used in critical phenomena studies in statistical mechanics or dynamical systems theory. Regularization that cures spurious divergences is distinguished from renormalization transformations allowing to compute actual physical divergences.
openaire   +1 more source

On the Origin of the Harmonic Term in Noncommutative Quantum Field Theory

open access: yesSymmetry, Integrability and Geometry: Methods and Applications, 2010
The harmonic term in the scalar field theory on the Moyal space removes the UV-IR mixing, so that the theory is renormalizable to all orders. In this paper, we review the three principal interpretations of this harmonic term: the Langmann-Szabo duality ...
Axel de Goursac
doaj   +1 more source

Renormalization group analysis for thermal turbulence

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1997
Renormalization group theory is applied to thermal turbulence. Turbulent fluxes for the flow are accounted for by repeatedly recasting the governing equations with the smallest scales represented by effective larger scales.
D. N. Riahi
doaj   +1 more source

Fractional Laplasians and propagation of waves in three-dimensional space as quantum process

open access: yesФизика волновых процессов и радиотехнические системы, 2016
In this paper it is shown that in the whole range of problems of waves propagation there is hidden feynmanon. We call by feynmanon the quantum object moving along fractal trajectories in phase space of dynamical system related with wave equation ...
A.A. Potapov, A.E. Rassadin
doaj  

Diagrammatic Schemes for Nonlinear Optical Interactions

open access: yesJournal of Raman Spectroscopy, EarlyView.
Conventional diagrammatic approaches (blue frames in the figure) to semi‐classical nonlinear optical interactions emphasize either the bra and ket matter states (double‐sided Feynman diagrams and Liouville pathways) or the frequencies of the bra and ket radiative processes between energy levels (Albrecht notation). We propose a field‐type modification (
F. Vergari   +3 more
wiley   +1 more source

Small elongated MLC fields: Novel equivalent square field formula and output factors

open access: yesMedical Physics, EarlyView.
Abstract Purpose This study evaluates different approaches for estimating the equivalent square field size (ESF) to derive the Output Correction Factors (OCF) according to the IAEA TRS‐483 protocol, for small fields, focusing on rectangular fields generated by MLCs.
Antonella Fogliata   +7 more
wiley   +1 more source

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