نتایج جستجو برای: exact diagonalization

تعداد نتایج: 122324  

Journal: :Physical review 2022

We search for short-range Hamiltonians of finite spin-1 kagome systems, maximizing the overlaps with lattice Moore-Read states. Our starting point is an exact, long-range parent Hamiltonian such a state on plane, obtained from conformal field theory. A truncation procedure applied to it, which retains only terms and makes it easy define torus. Finally, remaining coefficients are optimized, yiel...

Journal: :Physical Review C 2022

We present developments and applications for the diagonalization of shell-model hamiltonians in a discrete non-orthogonal basis (DNO-SM). The method, its actual numerical implementation CARINA, based on mean-field beyond-mean field techniques has already been applied previous studies is focused states selection optimization. method benchmarked against full set $sd$ shell exact diagonalizations,...

2007
Susumu Yamada Toshiyuki Imamura Takuma Kano Yoji Ohashi Hideki Matsumoto Masahiko Machida

In order to explore a possibility of superfluidity in confined strongly-correlated fermion systems, e.g., nano-scale cuprate High-Tc superconductors and atomic Fermi gases loaded on optical lattice, we implement an exact diagonalization code for their mathematical model, i.e., a trapped Hubbard model on the Earth Simulator. We compare two diagonalization algorithms, the traditional Lanczos meth...

Journal: :Physical review letters 2013
Enrico Arrigoni Michael Knap Wolfgang von der Linden

We introduce a versatile method to compute electronic steady-state properties of strongly correlated extended quantum systems out of equilibrium. The approach is based on dynamical mean-field theory (DMFT), in which the original system is mapped onto an auxiliary nonequilibrium impurity problem imbedded in a Markovian environment. The steady-state Green's function of the auxiliary system is sol...

1996
Frank Milde Rudolf A. Römer Michael Schreiber

We study the Anderson model of localization with anisotropic hopping in three dimensions for weakly coupled chains and weakly coupled planes. The eigenstates of the Hamiltonian, as computed by Lanczos diagonalization for systems of sizes up to 483, show multifractal behavior at the metal-insulator transition even for strong anisotropy. The critical disorder strength Wc determined from the syste...

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