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7 papers · 1 filter
Extended Hubbard model with renormalized Wannier wave functions in the correlated state: beyond the parametrized models
Jan Kurzyk, Włodzimierz Wójcik, Jozef Spałek
The method used earlier for analysis of correlated nanoscopic systems is extended to infinite (periodic) s-band like systems described by the Hubbard model and its extensions. The…
d-wave Superconductivity, Orbital Magnetism, and Unidirectional Charge Order in the t-J Model
Marcin Raczkowski
Recent scanning tunneling microscopy in the superconducting regime of two different cuprate families has revealed unidirectional bond-centered modulation in the local electronic de…
t-J model then and now: A personal perspective from the pioneering times
Jozef Spalek
In this overview I sketch briefly the path to the so-called {\em t-J model} derived for the first time 30 years ago and provide its original meaning within the theory of strongly c…
Diatomic molecule as a quantum entanglement switch
Adam Rycerz
We investigate a pair entanglement of electrons in diatomic molecule, modeled as a correlated double quantum dot attached to the leads. The low-temperature properties are derived f…
Entropy of entanglement and correlations induced by a quench: Dynamics of a quantum phase transition in the quantum Ising model
Lukasz Cincio, Jacek Dziarmaga, Marek M. Rams +1
Quantum Ising model in one dimension is an exactly solvable example of a quantum phase transition. We investigate its behavior during a quench from a paramagnetic to ferromagnetic…
The combined exact diagonalization - ab initio approach and its application to correlated electronic states and Mott-Hubbard localization in nanoscopic systems
J. Spalek, E. M. Gorlich, A. Rycerz +1
We overview the EDABI method developed recently and combining the exact diagonalization and ab initio aspects of electron states in correlated systems and apply it to nanoscopic sy…