Results 81 to 90 of about 55,124 (278)
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 +2 more
core +1 more source
Fermi-edge singularity and the functional renormalization group [PDF]
Journal of Physics: Condensed Matter, 2018 We study the Fermi-edge singularity, describing the response of a degenerate electron system to optical excitation, in the framework of the functional renormalization group (fRG). Results for the (interband) particle-hole susceptibility from various implementations of fRG (one- and two- particle-irreducible, multi-channel Hubbard-Stratonovich, flowing ...
Fabian B Kugler, Jan von Delft
openaire +6 more sources
Better integrators for functional renormalization group calculations
The European Physical Journal B, 2022 Abstract We analyze a variety of integration schemes for the momentum space functional renormalization group calculation with the goal of finding an optimized scheme. Using the square lattice $$t-t'$$ t - t
Jacob Beyer +2 more
openaire +4 more sources
Direct Evidence of Topological Dirac Fermions in a Low Carrier Density Correlated 5d Oxide
Advanced Functional Materials, EarlyView.The 5d oxide BiRe2O6 is discovered as a low‐carrier‐density topological semimetal hosting symmetry‐protected Dirac fermions stabilized by nonsymmorphic symmetries. Angle‐resolved photoemission spectroscopy, quantum oscillations, and magnetotransport measurements reveal gapless Dirac cones, quasi‐2D Fermi surfaces, high carrier mobility, and a field ...
Premakumar Yanda +11 more
wiley +1 more source
Connection between the renormalization groups of St\"uckelberg-Petermann and Wilson
, 2011 The Stueckelberg-Petermann renormalization group is the group of finite renormalizations of the S-matrix in the framework of causal perturbation theory.
Duetsch, Michael
core +1 more source
Functional renormalization group for non-equilibrium quantum many-body problems [PDF]
, 2006 We extend the concept of the functional renormalization for quantum many-body problems to non-equilibrium situations. Using a suitable generating functional based on the Keldysh approach, we derive a system of coupled differential equations for the $m ...
A. C. Hewson +15 more
core +1 more source
Local Thermal Conductivity Patterning in Rotating Lattice Crystals of Anisotropic Sb2S3
Advanced Functional Materials, EarlyView.Microscale control of thermal conductivity in Sb2S3 is demonstrated via laser‐induced rotating lattice crystals. Thermal conductivity imaging reveals marked thermal transport anisotropy, with the c axis featuring amorphous‐like transport, whereas in‐plane directions (a, b) exhibit 3.5x and 1.7x larger thermal conductivity.
Eleonora Isotta +13 more
wiley +1 more source
Boosting the Transparency of Metallic SrNbO3 Through Ti Doping
Advanced Materials Interfaces, EarlyView.Transparent conductors are optoelectronic devices of high demand. The present study presents a path on how to boost the figure of merit of the recently proposed perovskite oxides: Ti doping reduces electronic correlations and thus the absorption above the plasma frequency, while keeping the plasma frequency below the visible range.
Shammi Kumar +5 more
wiley +1 more source
The Functional Renormalization Group Treatment of Disordered Systems, a Review [PDF]
, 2003 Kay Jörg Wiese
+6 more sources
Physical Review Research, 2023 Active matter is not only relevant to living matter and diverse nonequilibrium systems, but also constitutes a fertile ground for novel physics. Indeed, dynamic renormalization group (DRG) analyses have uncovered many new universality classes (UCs) in ...
Patrick Jentsch, Chiu Fan Lee
doaj +1 more source