Results 121 to 130 of about 802,166 (283)

Higher-derivative extension of the functional renormalization group

Progress of Theoretical and Experimental Physics, 2022
Abstract We study the higher-derivative extension of the functional renormalization group (FRG). We consider FRG equations for a scalar field that consist of terms with higher functional derivatives of the effective action and arbitrary cutoff functions.
Tanaka, Gota, Tsuchiya, Asato
openaire   +2 more sources

Local Fermi Level Engineering in 2D‐MoS2 Realized via Microcontact Printing of Self‐Assembled Monolayers for Next‐Generation Electronics

Advanced Electronic Materials, EarlyView.
2D transition metal dichalcogenides (TMDCs) are promising for next‐gen optoelectronics. Their sensitivity to surroundings affects their electronic behavior. Substrate surfaces are chemically engineered to locally dope and adjust the properties of single layer MoS2 FETs employing self‐assembled monolayers (SAMs) arranged in patterns.
Sarah Grützmacher, Max Heyl, Norbert Koch, Emil J. W. List‐Kratochvil, Giovanni Ligorio   +4 more
wiley   +1 more source

Enhancement of field renormalization in scalar theories via functional renormalization group

, 2012
The flow equations of the Functional Renormalization Group are applied to the O(N)-symmetric scalar theory, for N=1 and N=4, in four Euclidean dimensions, d=4, to determine the effective potential and the renormalization function of the field in the ...
Dario Zappalà, J. Zinn-Justin, K.-I. Aoki   +2 more
core   +1 more source

Polyakov Effective Action from Functional Renormalization Group Equation [PDF]

, 2010
We discuss the Polyakov effective action for a minimally coupled scalar field on a two dimensional curved space by considering a non-local covariant truncation of the effective average action. We derive the flow equation for the form factor in $\int\sqrt{
Alessandro Codello, Barvinsky, Benedetti, Berges, Codello, Codello, Codello, Litim, Litim, Machado, Manrique, Mottola, Mukhanov, Polyakov, Reuter, Reuter, Weinberg, Wetterich   +17 more
core   +1 more source

Axion‐Like Interactions and CFT in Topological Matter, Anomaly Sum Rules and the Faraday Effect

Advanced Physics Research, EarlyView.
This review investigates the connection between chiral anomalies and their manifestation in topological materials, using both perturbative methods based on ordinary quantum field theory and conformal field theory (CFT). It emphasizes the role of CFT in momentum space for parity‐odd correlation functions, and their reconstruction by the inclusion of a ...
Claudio Corianò, Mario Cretì, Stefano Lionetti, Dario Melle, Riccardo Tommasi   +4 more
wiley   +1 more source

Continuum limit in matrix models for quantum gravity from the Functional Renormalization Group

, 2013
We consider the double-scaling limit in matrix models for two-dimensional quantum gravity, and establish the nonperturbative functional Renormalization Group as a novel technique to compute the corresponding interacting fixed point of the Renormalization
Eichhorn, Astrid, Koslowski, Tim
core   +1 more source

Renormalization group theory of the critical properties of the interacting bose fluid [PDF]

, 1982
Starting from a functional integral representation of the partition function we apply the renormalization group to the interacting Bose fluid. A closed form for the renormalization equation is derived and the critical exponents are calculated in 4-ε ...
Creswick, Richard J., Wiegel, Frederik W.   +1 more
core   +3 more sources

Quantum Anomalies in Condensed Matter

Advanced Physics Research, EarlyView.
Quantum materials provide a fertile ground in which to test and realize quantum anomalies predicted by quantum field theory. Quantum anomalies need to be canceled globally, however, quantum states with a quantum anomaly can exist at the boundary of topological materials.
Michael T. Pettes, Shi‐Zeng Lin, Elizabeth A. Peterson, Jian‐Xin Zhu, Laurel E. Winter, Johanna C. Palmstrom, Jinkyoung Yoo, Nicholas S. Sirica, Prashant Padmanabhan, Priscila F. S. Rosa, Sean M. Thomas, Avadh Saxena   +11 more
wiley   +1 more source

Nonvanishing gravitational contribution to matter beta functions for vanishing dimensionful regulators

European Physical Journal C: Particles and Fields, 2023
We explore the effect of quantum gravity on matter within a Renormalization Group framework. First, our results provide an explicit example of how misleading conclusions can be drawn by analyzing the gravitational contributions to beta functions, instead
Gustavo P. de Brito, Astrid Eichhorn
doaj   +1 more source

The porous medium equation: Large deviations and gradient flow with degenerate and unbounded diffusion

Communications on Pure and Applied Mathematics, EarlyView.
Abstract The problem of deriving a gradient flow structure for the porous medium equation which is thermodynamic, in that it arises from the large deviations of some microscopic particle system is studied. To this end, a rescaled zero‐range process with jump rate g(k)=kα,α>1$g(k)=k^\alpha, \alpha >1$ is considered, and its hydrodynamic limit and ...
Benjamin Gess, Daniel Heydecker
wiley   +1 more source