Dimerization tendencies of the pyrochlore Heisenberg antiferromagnet: A functional renormalization group perspective [PDF]
Physical review B, 2021 We investigate the ground state properties of the spin-$1/2$ pyrochlore Heisenberg antiferromagnet using pseudofermion functional renormalization group techniques.
Max Hering +4 more
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Functional and local renormalization groups [PDF]
Physical Review D, 2015 We discuss the relation between functional renormalization group (FRG) and local renormalization group (LRG), focussing on the two dimensional case as an example. We show that away from criticality the Wess-Zumino action is described by a derivative expansion with coefficients naturally related to RG quantities.
Codello A, D'Odorico G, Pagani C
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Cluster functional renormalization group [PDF]
Physical Review B, 2014 Functional renormalization group (FRG) has become a diverse and powerful tool to derive effective low-energy scattering vertices of interacting many-body systems. Starting from a non-interacting expansion point of the action, the flow of the RG parameter Lambda allows to trace the evolution of the effective one-particle and two-particle vertices ...
Reuther, Johannes, Thomale, Ronny
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Functional renormalization group for non-Hermitian and $\mathcal{PT}$-symmetric systems
SciPost Physics, 2022 We generalize the vertex expansion approach of the functional renormalization group to non-Hermitian systems. As certain anomalous expectation values might not vanish, additional terms as compared to the Hermitian case can appear in the flow equations.
Lukas Grunwald, Volker Meden, Dante M. Kennes
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Rise and fall of plaquette order in the Shastry-Sutherland magnet revealed by pseudofermion functional renormalization group [PDF]
Physical review B, 2021 The Shastry-Sutherland model as a canonical example of frustrated magnetism has been extensively studied. The conventional wisdom has been that the transition from the plaquette valence bond order to the Neel order is direct and potentially realizes a ...
A. Keles, E. Zhao
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Functional-renormalization-group approach to strongly coupled Bose-Fermi mixtures in two dimensions [PDF]
Physical Review A, 2021 We study theoretically the phase diagram of strongly coupled two-dimensional Bose-Fermi mixtures interacting with attractive short-range potentials as a function of the particle densities. We focus on the limit where the size of the bound state between a
Jonas von Milczewski +2 more
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Functional renormalization group for multilinear disordered Langevin dynamics I Formalism and first numerical investigations at equilibrium [PDF]
Journal of Physics Communications, 2021 This paper aims at using the functional renormalization group formalism to study the equilibrium states of a stochastic process described by a quench–disordered multilinear Langevin equation.
Vincent Lahoche +2 more
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Functional renormalization group for stochastic inflation [PDF]
Journal of Cosmology and Astroparticle Physics, 2018 We apply the functional renormalization group to Starobinsky's stochastic equation describing the local dynamics of a light scalar field in de Sitter. After elaborating on the over-damped regime of stochastic dynamics, we introduce an effective average action for the stochastic field, resulting by progressively integrating out frequencies, and study ...
Prokopec T, Rigopoulos G
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Operator product expansion coefficients from the nonperturbative functional renormalization group [PDF]
Physical Review D, 2021 Using the nonperturbative functional renormalization group (FRG) within the Blaizot-M\'endez-Galain-Wschebor approximation, we compute the operator product expansion (OPE) coefficient $c_{112}$ associated with the operators $\mathcal{O}_1\sim\varphi$ and
F. Rose, C. Pagani, N. Dupuis
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Physical properties of the massive Schwinger model from the nonperturbative functional renormalization group [PDF]
Physical Review D, 2021 We investigate the massive Schwinger model in $d=1+1$ dimensions using bosonization and the nonperturbative functional renormalization group. In agreement with previous studies we find that the phase transition, driven by a change of the ratio $m/e ...
Patrick Jentsch +3 more
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