Functional-renormalization-group approach to circuit quantum electrodynamics [PDF]
Physical Review A, 2022 A nonperturbative approach is developed to analyze superconducting circuits coupled to quantized electromagnetic continuum within the framework of the functional renormalization group.
Takeru Yokota, Kanta Masuki, Yuto Ashida
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Spin functional renormalization group for dimerized quantum spin systems [PDF]
Physical review B, 2022 We investigate dimerized quantum spin systems using the spin functional renormalization group approach proposed by Krieg and Kopietz [Phys. Rev. B 99 , 060403(R) (2019)] which directly focuses on the physical spin correlation functions and avoids the ...
Andreas Ruckriegel +3 more
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Critical phenomena and functional renormalization group
He jishu, 2023 Recent progress in studies on quantum chromodynamics (QCD) phase transition and related critical phenomena within the functional renormalization group (fRG) approach were reviewed, including the nonperturbative critical exponents and baryon number ...
YIN Shi, TAN Yangyang, FU Weijie
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Functional renormalization group for multilinear disordered Langevin dynamics II:Revisiting the p = 2 spin dynamics for Wigner and Wishart ensembles [PDF]
Journal of Physics Communications, 2022 In this paper, we investigate the large-time behavior for a slightly modified version of the standard p = 2 soft spins dynamics model, including a quartic or higher potential. The equilibrium states of such a model correspond to an effective field theory,
Vincent Lahoche +2 more
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Regulator dependence in the functional renormalization group: A quantitative explanation. [PDF]
Physical Review E, 2022 The search for controlled approximations to study strongly coupled systems remains a very general open problem. Wilson's renormalization group has shown to be an ideal framework to implement approximations going beyond perturbation theory. In particular,
Gonzalo De Polsi, N. Wschebor
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Functional and local renormalization groups [PDF]
Physical Review D, 2015 We discuss the relation between functional renormalization group (FRG) and local renormalization group (LRG), focussing on the two dimensional case as an example. We show that away from criticality the Wess-Zumino action is described by a derivative expansion with coefficients naturally related to RG quantities.
Codello A, D'Odorico G, Pagani C
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Cluster functional renormalization group [PDF]
Physical Review B, 2014 Functional renormalization group (FRG) has become a diverse and powerful tool to derive effective low-energy scattering vertices of interacting many-body systems. Starting from a non-interacting expansion point of the action, the flow of the RG parameter Lambda allows to trace the evolution of the effective one-particle and two-particle vertices ...
Reuther, Johannes, Thomale, Ronny
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Functional renormalization group study of the Kitaev- Γ model on the honeycomb lattice and emergent incommensurate magnetic correlations [PDF]
Physical review B, 2021 The theoretical inception of the Kitaev honeycomb model has had defining influence on the experimental hunt for quantum spin liquids, bringing unprecedented focus onto the synthesis of materials with bond-directional interactions.
F. Buessen, Yong Baek Kim
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Functional renormalization group for non-Hermitian and $\mathcal{PT}$-symmetric systems
SciPost Physics, 2022 We generalize the vertex expansion approach of the functional renormalization group to non-Hermitian systems. As certain anomalous expectation values might not vanish, additional terms as compared to the Hermitian case can appear in the flow equations.
Lukas Grunwald, Volker Meden, Dante M. Kennes
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Dimerization tendencies of the pyrochlore Heisenberg antiferromagnet: A functional renormalization group perspective [PDF]
Physical review B, 2021 We investigate the ground state properties of the spin-$1/2$ pyrochlore Heisenberg antiferromagnet using pseudofermion functional renormalization group techniques.
Max Hering +4 more
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