Product Wave Function Renormalization Group Method [PDF]
Journal of the Physical Society of Japan, 1995 The authors propose a fast numerical renormalization group method --- the product wave function renormalization group (PWFRG) method --- for 1D quantum lattice models and 2D classical ones. A variational wave function, which is expressed by a matrix product, is improved through a self-consistent calculation.
Tomotoshi Nishino, Kouichi Okunishi
arxiv +6 more sources
Functional renormalization group flow of massive gravity [PDF]
European Physical Journal C: Particles and Fields, 2020 We apply the functional renormalization group equation to a massive Fierz–Pauli action in curved space and find that, even though a massive term is a modification in the infrared sector, the mass term modifies the value of the non-gaussian fixed point in
Maximiliano Binder, Iván Schmidt
doaj +5 more sources
Single-boson exchange representation of the functional renormalization group for strongly interacting many-electron systems [PDF]
Physical Review Research, 2022 We present a reformulation of the functional renormalization group (fRG) for many-electron systems, which relies on the recently introduced single-boson exchange (SBE) representation of the parquet equations [F. Krien, A. Valli, and M. Capone, Phys. Rev.
Pietro M. Bonetti +4 more
doaj +2 more sources
Quantitative functional renormalization group description of the two-dimensional Hubbard model [PDF]
Physical Review Research, 2020 Using a leading algorithmic implementation of the functional renormalization group (fRG) for interacting fermions on two-dimensional lattices, we provide a detailed analysis of its quantitative reliability for the Hubbard model.
Cornelia Hille +7 more
doaj +2 more sources
Functional renormalization group for Luttinger liquids with impurities [PDF]
, 2004 We improve the recently developed functional renormalization group (fRG) for impurities and boundaries in Luttinger liquids by including renormalization of the two-particle interaction, in addition to renormalization of the impurity potential.
I. E. Dzyaloshinskii +13 more
core +2 more sources
Quark Confinement and the Renormalization Group [PDF]
, 2010 Recent approaches to quark confinement are reviewed, with an emphasis on their connection to renormalization group methods. Basic concepts related to confinement are introduced: the string tension, Wilson loops and Polyakov lines, string breaking, string tension scaling laws, center symmetry breaking, and the deconfinement transition at non-zero ...
Migdal A. A. +2 more
arxiv +3 more sources
Alternative flow equation for the functional renormalization group [PDF]
Physical Review D, 2019 We derive an alternative to the Wetterich-Morris-Ellwanger equation by means of the two-particle irreducible (2PI) effective action, exploiting the method of external sources due to Garbrecht and Millington.
Alexander, Elizabeth +3 more
core +7 more sources
Functional renormalization group study of the Kitaev-
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.
Finn Lasse Buessen, Yong Baek Kim
openalex +3 more sources
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
doaj +2 more sources
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
core +7 more sources