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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Fermi-edge singularity and the functional renormalization group [PDF]
Journal of Physics: Condensed Matter, 2018 We study the Fermi-edge singularity, describing the response of a degenerate electron system to optical excitation, in the framework of the functional renormalization group (fRG).
Kugler, Fabian B., von Delft, Jan
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Bosonization and Functional Renormalization Group Approach in the Framework of QED_2 [PDF]
, 2011 Known results on two-dimensional quantum electrodynamics (QED_2) have been used to study the dependence of functional renormalization group equations on renormalization schemes and approximations applied for its bosonized version. It is demonstrated that
Nandori, I.
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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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Functional renormalization-group approach to decaying turbulence [PDF]
Journal of Statistical Mechanics: Theory and Experiment, 2013 39 pages, 25 ...
Andrei A. Fedorenko +2 more
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Functional renormalization group approach to non-collinear magnets [PDF]
Physical Review B, 2015 A functional renormalization group approach to $d$-dimensional, $N$-component, non-collinear magnets is performed using various truncations of the effective action relevant to study their long distance behavior.
Delamotte, B. +3 more
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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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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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Pseudo-fermion functional renormalization group for spin models [PDF]
Reports on progress in physics. Physical Society, 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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