Results 61 to 70 of about 802,166 (283)
Bound states in functional renormalization group [PDF]
International Journal of Modern Physics A, 2019 Equivalence criteria are established for an effective Yukawa-type theory of composite fields representing two-particle fermion bound states with the original “microscopic” theory of interacting fermions based on the spectral decomposition of the 2-to-2 fermion scattering amplitude. Functional renormalization group equations of the effective theory are
Antal Jakovác, András Patkós
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Prescription dependence of renormalization-group functions [PDF]
Physical Review D, 1982 The dependence on the renormalization scheme of the important QCD renormalization-group parameters β , γ , and δ is discussed. We compute the second coefficient for all three parameters for several renormalization schemes which include all the standard ones.
Espriu, D. (Domènec) +1 more
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Spatio-temporal correlation functions in scalar turbulence from functional renormalization group [PDF]
The Physics of Fluids, 2021 We provide the leading behavior at large wavenumbers of the two-point correlation function of a scalar field passively advected by a turbulent flow. We first consider the Kraichnan model, in which the turbulent carrier flow is modeled by a stochastic ...
C. Pagani, L. Canet
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Analytic continuation of functional renormalization group equations [PDF]
, 2011 Functional renormalization group equations are analytically continued from imaginary Matsubara frequencies to the real frequency axis. On the example of a scalar field with O(N) symmetry we discuss the analytic structure of the flowing action and show ...
Floerchinger, Stefan
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Anti-Newtonian Expansions and the Functional Renormalization Group
Universe, 2019 Anti-Newtonian expansions are introduced for scalar quantum field theories and classical gravity. They expand around a limiting theory that evolves only in time while the spatial points are dynamically decoupled.
Max Niedermaier
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Ultracold atoms and the Functional Renormalization Group
Nuclear Physics B - Proceedings Supplements, 2012 We give a self-contained introduction to the physics of ultracold atoms using functional integral techniques. Based on a consideration of the relevant length scales, we derive the universal effective low energy Hamiltonian describing ultracold alkali atoms.
Jan M. Pawlowski +3 more
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Functional renormalization group in Floquet space [PDF]
Physical Review B, 2016 16 pages, 9 ...
Volker Meden +2 more
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Exploring the θ-vacuum structure in the functional renormalization group approach
Journal of High Energy Physics, 2022 We investigate the θ-vacuum structure and the ’t Hooft anomaly at θ = π in a simple quantum mechanical system on S 1 to scrutinize the applicability of the functional renormalization group (fRG) approach.
Kenji Fukushima +2 more
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Multiloop functional renormalization group for general models [PDF]
, 2018 We present multiloop flow equations in the functional renormalization group (fRG) framework for the four-point vertex and self-energy, formulated for a general fermionic many-body problem. This generalizes the previously introduced vertex flow [F.
Kugler, Fabian B., von Delft, Jan
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Renormalization Group Transformation for the Wave Function [PDF]
Annals of Physics, 1998 The problem considered here is the determination of the hamiltonian of a first quantized nonrelativistic particle by the help of some measurements of the location with a finite resolution. The resulting hamiltonian depends on the resolution of the measuring device.
Hanae El Hattab +2 more
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