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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The conformal sector of Quantum Einstein Gravity beyond the local potential approximation
Physics Letters B, 2023 The anomalous scaling of Newton's constant around the Reuter fixed point is dynamically computed using the functional flow equation approach. Specifically, we thoroughly analyze the flow of the most general conformally reduced Einstein-Hilbert action ...
Alfio Bonanno +2 more
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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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WAVE FUNCTIONALS, HAMILTONIANS AND THE RENORMALIZATION GROUP [PDF]
International Journal of Modern Physics A, 1996 We analyze the renormalization of wave functionals and energy eigenvalues in field theory. A general discussion of the canonical structure of the renormalization group equation is also given.
V. P. Nair, D.Minic
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Superfluidity in multicomponent fermions via the functional renormalization group
Nuclear Physics B, 2023 We reveal the critical properties of the phase transition towards superfluid order that has been proposed to occur in large spin fermionic systems. For this purpose, we consider the bosonic field theory for fluctuations of the complex skew-symmetric rank-
Michal Hnatič, Georgii Kalagov
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Spectral Functions from the Functional Renormalization Group [PDF]
Nuclear Physics A, 2017 CPOD 2017 ...
J. Wambach +4 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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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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Fermionic spectral functions with the functional renormalization group [PDF]
Physical Review D, 2018 We present first results on the calculation of fermionic spectral functions from analytically continued flow equations within the functional renormalization group approach. Our method is based on the same analytic continuation from imaginary to real frequencies that was developed and used previously for bosonic spectral functions.
Ralf-Arno Tripolt +4 more
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On ambiguities and divergences in perturbative renormalization group functions [PDF]
Journal of High Energy Physics, 2021 Abstract There is an ambiguity in choosing field-strength renormalization factors in the $$ \overline{\mathrm{MS}} $$ MS ¯ scheme starting from the 3-loop order in perturbation theory. More concerning, trivially choosing Hermitian factors
Florian Herren, Anders Eller Thomsen
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