Results 71 to 80 of about 55,124 (278)
Theory of Lattice and Electronic Fluctuations in Weakly Localized Spin-Peierls Systems [PDF]
, 1996 A theoretical approach to the influence of one-dimensional lattice fluctuations on electronic properties in weakly localized spin-Peierls systems is proposed using the renormalization group and the functional integral techniques.
Bourbonnais, Claude, Dumoulin, Benoit
core +2 more sources
Scheme dependence and universality in the functional renormalization group [PDF]
Physical Review D, 2014 We prove that the functional renormalization group flow equation admits a perturbative solution and show explicitly the scheme transformation that relates it to the standard schemes of perturbation theory. We then define a universal scheme within the functional renormalization group.
Codello A., Demmel M., Zanusso O.
openaire +5 more sources
Analyzing Electronic Excitations and Exciton Binding Energies in Y6 Films
Advanced Functional Materials, EarlyView.The Y6 molecule is used for increasing the efficiency of organic solar cells. The exciton binding energy is calculated for ensembles of Y6 molecules that are representative of the typically used films. The calculations show that the excitons typically spread out over many molecules.
Sahar Javaid Akram +2 more
wiley +1 more source
The Functional Renormalization Group in Quantum Gravity
, 2023 The gravitational asymptotic safety program envisions a high-energy completion of the gravitational interactions by an interacting renormalization group fixed point, the Reuter fixed point. The primary tool for investigating this scenario are functional renormalization group equations, foremost the Wetterich equation.
openaire +3 more sources
Introduction to the Functional Renormalization Group [PDF]
, 2010 I Foundations of the renormalization group.- Phase Transitions and the Scaling Hypothesis.- Mean-Field Theory and the Gaussian Approximation.- Wilsonian Renormalization Group.- Critical Behavior of the Ising Model Close to Four Dimensions.- Field-Theoretical Renormalization Group.- II Introduction to the functional renormalization group.- Functional ...
Florian Schütz +2 more
openaire +2 more sources
Alternative flow equation for the functional renormalization group [PDF]
Physical Review D, 2019 We derive an alternative to the Wetterich-Morris-Ellwanger equation by means of the two-particle irreducible (2PI) effective action, exploiting the method of external sources due to Garbrecht and Millington. The latter allows the two-point source of the 2PI effective action to be associated consistently with the regulator of the renormalization group ...
Elizabeth Alexander +3 more
openaire +4 more sources
Optical Control of the Thermal Conductivity in BaTiO3
Advanced Functional Materials, EarlyView.Light‐driven manipulation of thermal conductivity in archetypal ferroelectric, BaTiO3, offers a novel and effective approach for the dynamical control of the heat flux, with potential applications in thermal management and phonon‐based logic. Abstract Achieving dynamic control over thermal conductivity remains a formidable challenge in condensed matter
Claudio Cazorla +4 more
wiley +1 more source
Functional renormalization group and conformal invariance in cold atoms
EPJ Web of Conferences, 2010 We present an application of a field-theoretic functional renormalization group technique to fewbody (vacuum) physics of nonrelativistic atoms near a Feshbach resonance.
Moroz S.
doaj +1 more source
Four Loop Scalar ϕ4 Theory Using the Functional Renormalization Group †
Universe, 2019 We work with a symmetric scalar theory with quartic coupling in 4-dimensions. Using a 2PI effective theory and working at 4 loop order, we renormalize with a renormalization group method. All divergences are absorbed by one bare coupling constant and one
Margaret E. Carrington +1 more
doaj +1 more source
UV completion of extradimensional Yang-Mills theory for Gauge-Higgs unification
SciPost Physics, 2023 The $SU(N)$ Yang-Mills theory in $\mathbb R^4\times S^1$ spacetime is studied as a simple toy model of Gauge-Higgs unification. The theory is perturbatively nonrenormalizable but could be formulated as an asymptotically safe theory, namely a ...
Álvaro Pastor-Gutiérrez, Masatoshi Yamada
doaj +1 more source