Functional renormalization group approach for signal detection
SciPost Physics CoreThis review paper utilizes renormalization group techniques for signal detection in nearly continuous positive spectra. We emphasize the universal aspects of the analogue field-theory approach.
Vincent Lahoche, Dine Ousmane Samary, Mohamed Tamaazousti
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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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Functional renormalization group for fermions on a one dimensional lattice at arbitrary filling [PDF]
SciPost PhysicsA formalism based on the fermionic functional-renormalization-group approach to interacting electron models defined on a lattice is presented. One-loop flow equations for the coupling constants and susceptibilities in the particle-particle and particle ...
Lucas Désoppi, Nicolas Dupuis, Claude Bourbonnais
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Truncated-Unity Functional Renormalization Group for Multiband Systems With Spin-Orbit Coupling [PDF]
Frontiers in Physics, 2018 Although the functional renormalization group (fRG) is by now a well-established method for investigating correlated electron systems, it is still undergoing significant technical and conceptual improvements.
Giulio A. H. Schober +5 more
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Functional renormalization group study of neutral and charged pions in magnetic fields in the quark-meson model [PDF]
Physical Review D, 2023 We calculated the masses of neutral and charged pion and pion decay constants under an extra magnetic field at zero temperature. The quantum fluctuations are integrated through the functional renormalization group.
Rui Wen, Shi Yin, Wei-jie Fu, Mei Huang
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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 +3 more
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Functional Renormalization Group Study of Superconductivity in Rhombohedral Trilayer Graphene. [PDF]
Physical Review Letters, 2022 We employ a functional renormalization group approach to ascertain the pairing mechanism and symmetry of the superconducting phase observed in rhombohedral trilayer graphene.
W. Qin +5 more
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Reference results for the momentum space functional renormalization group [PDF]
European Physical Journal B : Condensed Matter Physics, 2022 The functional renormalization group (FRG), an established computational method for quantum many-body phenomena, has been subject to a diversification in topical applications, analytic approximations and numerical implementations.
Jacob Beyer, J. Hauck, L. Klebl
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Competing instabilities of the extended Hubbard model on the triangular lattice: Truncated-unity functional renormalization group and application to moiré materials [PDF]
Physical review B, 2022 A simple yet paradigmatic model for the interplay of strong electronic correlations and geometric frustration is the triangular lattice Hubbard model.
Nico Gneist, L. Classen, M. Scherer
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Critical Probability Distributions of the Order Parameter from the Functional Renormalization Group. [PDF]
Physical Review Letters, 2022 We show that the functional renormalization group (FRG) allows for the calculation of the probability distribution function of the sum of strongly correlated random variables.
I. Balog, A. Rançon, B. Delamotte
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