Results 101 to 110 of about 23,387 (277)
Renormalization group for the XYZ model
, 1998 We study in a rigorous way the XYZ spin model by Renormalization Group methods. pacs 75.10.Jm Renormalization Group, Correlations, XYZ chain The XY Z model is exactly solvable [1] by the transfer matrix formalism as it is equivalent [2] to the eight ...
Mastropietro Dipartimento +2 more
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Wilson's numerical renormalization group
, 1999 Wilson´s Numerical Renormalization Group. - In: Density matrix renormalization / Ingo Peschel ... (ed.). - Berlin u.a. : Springer, 1999. - S. 3-25.
Costi, Theo
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Quenching the Hubbard Model: Comparison of Nonequilibrium Green's Function Methods
Contributions to Plasma Physics, EarlyView.ABSTRACT We benchmark nonequilibrium Green's function (NEGF) approaches for interaction quenches in the half‐filled Fermi–Hubbard model in one and two dimensions. We compare fully self‐consistent two‐time Kadanoff–Baym equations (KBE), the generalized Kadanoff–Baym ansatz (GKBA), and the recently developed NEGF‐based quantum fluctuations approach (NEGF‐
Jan‐Philip Joost +3 more
wiley +1 more source
General quartic β-function at three loops
Journal of High Energy PhysicsWe determine the three-loop MS ¯ $$ \overline{\textrm{MS}} $$ quartic β-function for the most general renormalisable four-dimensional theories. A general parametrisation of the β-function is compared to known β-functions for specific theories to fix all ...
Tom Steudtner, Anders Eller Thomsen
doaj +1 more source
Is Deep Learning a Renormalization Group Flow?
IEEE Access, 2020 Although there has been a rapid development of practical applications, theoretical explanations of deep learning are in their infancy. Deep learning performs a sophisticated coarse graining.
Ellen De Mello Koch +2 more
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Phenomenological renormalization group methods [PDF]
, 1999 Some renormalization group approaches have been proposed during the last few years which are close in spirit to the Nightingale phenomenological procedure. In essence, by exploiting the finite size scaling hypothesis, the approximate critical behavior of
Grandi, B. C. S. +2 more
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Kylin 1.0: An Ab-Initio Density Matrix Renormalization Group Quantum Chemistry Program
, 2022 The accurate evaluation of electron correlations is highly necessary for the proper descriptions of the electronic structures in strongly correlated molecules, ranging from bond-dissociating molecules, polyradicals, to large conjugated molecules and ...
Yinxuan, Song +9 more
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EcoEnergy, EarlyView.This review systematically examines how different transition metal compounds—such as binary and multinary metal oxides, halides, sulfides, and salts—exhibit thermochromism based on the d‐electron configurations of their transition metal cations. It focuses on three main mechanisms of thermochromism: phase transition, charge transfer, and bandgap change.
Jie Wang +5 more
wiley +1 more source
A Renormalization Group Procedure for Fiber Bundle Models
Frontiers in Physics, 2018 We introduce two versions of a renormalization group scheme for the equal load sharing fiber bundle model. The renormalization group is based on formulating the fiber bundle model in the language of damage mechanics.
Srutarshi Pradhan +3 more
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, 2002 textIn this thesis, we apply the ideas of the renormalization group to two different areas of physics. Extending the work of del-Castillo-Negrete, Greene and Morrison on the standard nontwist map, we study the break-up of an invariant torus with ...
Wurm, Alexander
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