Pseudogap opening in the two-dimensional Hubbard model: A functional renormalization group analysis [PDF]
Physical Review Research, 2020 Using the recently introduced multiloop extension of the functional renormalization group, we compute the frequency- and momentum-dependent self-energy of the two-dimensional Hubbard model at half filling and weak coupling. We show that, in the truncated-
Cornelia Hille +3 more
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Introduction to the nonequilibrium functional renormalization group [PDF]
Nuclear Physics B - Proceedings Supplements, 2012 In these lectures we introduce the functional renormalization group out of equilibrium. While in thermal equilibrium typically a Euclidean formulation is adequate, nonequilibrium properties require real-time descriptions. For quantum systems specified by
Aarts +63 more
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On avoiding Ostrogradski instabilities within Asymptotic Safety [PDF]
Journal of High Energy Physics, 2017 We study the renormalization group flow of gravity coupled to scalar matter using functional renormalization group techniques. The novel feature is the inclusion of higher-derivative terms in the scalar propagator.
Daniel Becker +2 more
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Functional renormalization group study of the Anderson–Holstein model
New Journal of Physics, 2014 We present a comprehensive study of the spectral and transport properties in the Anderson–Holstein model both in and out of equilibrium using the functional renormalization group (fRG).
M A Laakso +3 more
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Phase transitions in TGFT: functional renormalization group in the cyclic-melonic potential approximation and equivalence to O(N) models [PDF]
Journal of High Energy Physics, 2020 In the group field theory approach to quantum gravity, continuous spacetime geometry is expected to emerge via phase transition. However, understanding the phase diagram and finding fixed points under the renormalization group flow remains a major ...
Andreas G. A. Pithis, Johannes Thürigen
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Dynamical functional renormalization group computation of order parameters and critical temperatures in the two-dimensional Hubbard model [PDF]
Physical review B, 2020 We analyze the interplay of antiferromagnetism and pairing in the two dimensional Hubbard model with a moderate repulsive interaction. Coupled charge, magnetic and pairing fluctuations above the energy scale of spontaneous symmetry breaking are treated ...
Demetrio Vilardi +2 more
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Ab initio construction of the energy density functional for electron systems with the functional-renormalization-group-aided density functional theory [PDF]
Physical Review Research, 2021 We show an ab initio construction of the energy density functional (EDF) for electron systems using the functional renormalization group. The correlation energies of the homogeneous electron gas given in our framework reproduce the exact behavior at high
Takeru Yokota, Tomoya Naito
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Properties of the linearized functional renormalization group
Physical Review D, 2022 19 ...
T. Morris
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Scheme dependence and universality in the functional renormalization group [PDF]
Physical Review D, 2014 We prove that the functional renormalization group flow equation admits a perturbative solution and show explicitly the scheme transformation that relates it to the standard schemes of perturbation theory.
Codello, Alessandro +2 more
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Gauge dependence of alternative flow equation for the functional renormalization group
Nuclear Physics B, 2020 The gauge dependence problem of alternative flow equation for the functional renormalization group is studied. It is shown that the effective two-particle irreducible effective action depends on gauges at any value of IR parameter k.
Peter M. Lavrov
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