Numerical renormalization group at criticality
نویسندگان
چکیده
منابع مشابه
Proposed Renormalization Group Analysis of Nonlinear Brain Dynamics at Criticality
Perception is characterized by the formation of spatiotemporal patterns of neural activity that embody mental categories of the material events provided by the senses. The patterns are constructed by modifications of the background activity, which is maintained and self-regulated at criticality, such that all frequencies and wavelengths coexist in neural activity, from the atomic level to the w...
متن کاملA NUMERICAL RENORMALIZATION GROUP APPROACH FOR AN ELECTRON-PHONON INTERACTION
A finite chain calculation in terms of Hubbard X-operators is explored by setting up a vibronic Harniltonian. The model conveniently transformed into a form so that in the case of strong coupling a numerical renormalization group approach is applicable. To test the technique, a one particle Green function is calculated for the model Harniltonian
متن کامل1 Wilson’s Numerical Renormalization Group
The idea of the numerical renormalization group (NRG) for a quantum-mechanical system with Hamiltonian H is to obtain the many-body eigen-states and eigenvalues on all energy scales ω 1 > ω 2 >. .. in a sequence of steps, with each step corresponding to a distinct energy or length scale [1]. This is achieved by a formal procedure of tracing out high energy states to (RG) transformation R relate...
متن کاملa numerical renormalization group approach for an electron-phonon interaction
a finite chain calculation in terms of hubbard x-operators is explored by setting up a vibronic harniltonian. the model conveniently transformed into a form so that in the case of strong coupling a numerical renormalization group approach is applicable. to test the technique, a one particle green function is calculated for the model harniltonian
متن کاملA Renormalization Group for Hamiltonians: Numerical Results
We describe a renormalization group transformation that is related to the breakup of golden invariant tori in Hamiltonian systems with two degrees of freedom. This transformation applies to a large class of Hamiltonians, is conceptually simple, and allows for accurate numerical computations. In a numerical implementation, we find a nontrivial fixed point and determine the corresponding critical...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics Letters A
سال: 1996
ISSN: 0375-9601
DOI: 10.1016/0375-9601(96)00128-4