Method of the Functional Renormalization Group in General Gauge Theories
Sign Up to like & getrecommendations! Published in 2017 at "Russian Physics Journal"
DOI: 10.1007/s11182-017-1120-9
Abstract: The problem of the gauge dependence of the effective field is considered within the framework of the method of the functional renormalization group for general gauge theories. read more here.
Keywords: group general; renormalization group; gauge; general gauge ... See more keywords
Numerical accuracy of the derivative-expansion-based functional renormalization group
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DOI: 10.1088/1742-5468/ad6c31
Abstract: We investigate the precision of the numerical implementation of the functional renormalization group based on extracting the eigenvalues from the linearized renormalization group transformation. For this purpose, we implement the local potential approximation and O(∂2)… read more here.
Keywords: renormalization group; derivative expansion; functional renormalization;
Functional-renormalization-group approach to circuit quantum electrodynamics
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DOI: 10.1103/physreva.107.043709
Abstract: A nonperturbative approach is developed to analyze superconducting circuits coupled to quantized electromagnetic continuum within the framework of the functional renormalization group. The formalism allows us to determine complete physical pictures of equilibrium properties in… read more here.
Keywords: renormalization group; functional renormalization; circuit quantum; electrodynamics ... See more keywords
Keldysh functional renormalization group for electronic properties of graphene
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DOI: 10.1103/physrevb.95.125412
Abstract: We construct a nonperturbative nonequilibrium theory for graphene electrons interacting via the instantaneous Coulomb interaction by combining the functional renormalization group method with the nonequilibrium Keldysh formalism. The Coulomb interaction is partially bosonized in the… read more here.
Keywords: keldysh functional; renormalization group; group electronic; functional renormalization ... See more keywords
Numerical treatment of spin systems with unrestricted spin length S : A functional renormalization group study
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DOI: 10.1103/physrevb.96.045144
Abstract: We develop a generalized pseudo-fermion functional renormalization group (PFFRG) approach that can be applied to arbitrary Heisenberg models with spins ranging from the quantum case $S=1/2$ to the classical limit $S\rightarrow\infty$. Within this framework, spins… read more here.
Keywords: treatment; renormalization group; spin; functional renormalization ... See more keywords
Second-order functional renormalization group approach to one-dimensional systems in real and momentum space
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DOI: 10.1103/physrevb.96.235122
Abstract: We devise a functional renormalization group treatment for a chain of interacting spinless fermions which is correct up to second order in the interaction strength. We treat both inhomogeneous systems in real-space as well as… read more here.
Keywords: renormalization group; space; second order; systems real ... See more keywords
Functional renormalization group treatment of the 0.7 analog in quantum point contacts
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DOI: 10.1103/physrevb.98.115112
Abstract: We use a recently developed fRG method (extendend Coupled-Ladder Approximation) to study the 0.7 analog in quantum point contacts, arising at the crossing of the first and second band at sufficiently high magnetic fields. We… read more here.
Keywords: quantum point; analog quantum; analog; point contacts ... See more keywords
Physical properties of the massive Schwinger model from the nonperturbative functional renormalization group
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DOI: 10.1103/physrevd.105.016028
Abstract: We investigate the massive Schwinger model in d = 1 + 1 dimensions using bosonization and the non-perturbative functional renormalization group. In agreement with previous studies we find that the phase transition, driven by a… read more here.
Keywords: functional renormalization; renormalization; massive schwinger; renormalization group ... See more keywords
BRST, Ward identities, gauge dependence, and a functional renormalization group
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DOI: 10.1103/physrevd.105.085014
Abstract: Basic properties of gauge theories in the framework of Faddeev-Popov (FP) method, Batalin-Vilkovisky (BV) formalism, functional renormalization group (FRG) approach are considered. The FP and BV quantizations are characterized by the Becchi-Rouet-Stora-Tyutin (BRST) symmetry while… read more here.
Keywords: functional renormalization; renormalization group; gauge dependence;
Effective quantum spacetimes from functional renormalization group
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DOI: 10.1103/physrevd.111.064031
Abstract: Using the Functional Renormalization Group approach we construct effective quantum spacetime geometries by self-consistently deforming the classical Schwarzschild-de Sitter black-hole solution. This involves studying how quantum corrections, driven by the running of the Newton's and… read more here.
Keywords: effective quantum; renormalization group; quantum; functional renormalization ... See more keywords
Functional renormalization of QCD in 1+1 dimensions: Four-fermion interactions from quark-gluon dynamics
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DOI: 10.1103/physrevd.111.074006
Abstract: Quantum chromodynamics in two spacetime dimensions is investigated with the Functional Renormalization Group. We use a functional formulation with covariant gauge fixing and derive Renormalization Group flow equations for the gauge coupling, quark mass and… read more here.
Keywords: renormalization; renormalization qcd; fermion; qcd dimensions ... See more keywords