Results 11 to 20 of about 789,910 (273)
Cosmological α′-corrections from the functional renormalization group [PDF]
Journal of High Energy Physics, 2021 We employ the techniques of the Functional Renormalization Group in string theory, in order to derive an effective mini-superspace action for cosmological backgrounds to all orders in the string scale α′.
Ivano Basile, Alessia Platania
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Functional renormalization group flow of massive gravity [PDF]
European Physical Journal C: Particles and Fields, 2020 We apply the functional renormalization group equation to a massive Fierz–Pauli action in curved space and find that, even though a massive term is a modification in the infrared sector, the mass term modifies the value of the non-gaussian fixed point in
Maximiliano Binder, Iván Schmidt
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Effective action from the functional renormalization group [PDF]
European Physical Journal C: Particles and Fields, 2020 We study the quantum gravitational system coupled to a charged scalar, Dirac fermions, and electromagnetic fields. We use the “exact” or “functional” renormalization group equation to derive the effective action $$\Gamma _0$$ Γ 0 by integrating the flow ...
Nobuyoshi Ohta, Lesław Rachwał
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Single-boson exchange representation of the functional renormalization group for strongly interacting many-electron systems [PDF]
Physical Review Research, 2022 We present a reformulation of the functional renormalization group (fRG) for many-electron systems, which relies on the recently introduced single-boson exchange (SBE) representation of the parquet equations [F. Krien, A. Valli, and M. Capone, Phys. Rev.
Pietro M. Bonetti +4 more
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Single-boson exchange functional renormalization group application to the two-dimensional Hubbard model at weak coupling. [PDF]
Eur Phys J B, 2022 We illustrate the algorithmic advantages of the recently introduced single-boson exchange (SBE) formulation for the one-loop functional renormalization group (fRG), by applying it to the two-dimensional Hubbard model on a square lattice.
Fraboulet K +6 more
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Quark-meson model under rotation: A functional renormalization group study [PDF]
Physical Review D, 2023 Rapid rotation may exist in physical systems such as non-central heavy ion collisions and neutron stars. Using functional renormalization group analysis of the quark-meson model, we investigate the effects of real and imaginary rotation on the chiral ...
Hao-Lei Chen +2 more
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Deep Learning the Functional Renormalization Group. [PDF]
Physical Review Letters, 2022 We perform a data-driven dimensionality reduction of the scale-dependent four-point vertex function characterizing the functional renormalization group (FRG) flow for the widely studied two-dimensional t-t^{'} Hubbard model on the square lattice.
D. D. Sante +6 more
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Critical dynamics in a real-time formulation of the functional renormalization group [PDF]
Journal of High Energy Physics, 2023 We present first calculations of critical spectral functions of the relaxational Models A, B, and C in the Halperin-Hohenberg classification using a real-time formulation of the functional renormalization group (FRG). We revisit the prediction by Son and
Johannes V. Roth, Lorenz von Smekal
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Renormalized functional renormalization group
Physics Letters B, 2018 We construct a new version of the effective average action together with its flow equation. The construction entails in particular the consistency of fluctuation field and background field equations of motion, even for finite renormalization group scales.
Stefan Lippoldt
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Pseudo-fermion functional renormalization group for spin models [PDF]
Reports on Progress in Physics, 2023 For decades, frustrated quantum magnets have been a seed for scientific progress and innovation in condensed matter. As much as the numerical tools for low-dimensional quantum magnetism have thrived and improved in recent years due to breakthroughs ...
T. Müller +7 more
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