Exact Ground State of Strongly Correlated Electron Systems from Symmetry-Entangled Wave-Functions

Autor:	Leprévost, A., Juillet, O., Frésard, R.
Rok vydání:	2014
Předmět:	Condensed Matter - Strongly Correlated Electrons
Zdroj:	Ann. Phys. (Berlin) 526,430 (2014)
Druh dokumentu:	Working Paper
DOI:	10.1002/andp.201400129
Popis:	The four-site Hubbard model is considered from the exact diagonalisation and variational method points of view. It is shown that the exact ground-state can be recovered by a symmetry projected Slater determinant, irrespective of the interaction strength. This is in contrast to the Gutzwiller wave-function, which is calculated as well. Comment: 10 pages, 4 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1406.2825 Zobrazit plný text záznamu View this record from Arxiv