Exact ground state of strongly correlated electron systems from symmetry-entangled wave-functions

被引：3
|
作者：
Leprevost, Alexandre [1 ]
Juillet, Olivier [1 ]
Fresard, Raymond [2 ]
机构：
[1] Univ Caen, Lab LPC Caen, ENSICAEN, CNRS IN2P3, F-14050 Caen, France
[2] UMR CNRS ENSICAEN ISMRA 6508, Lab CRISMAT, F-14050 Caen, France
来源：
ANNALEN DER PHYSIK | 2014年 / 526卷 / 9-10期
关键词：
Low-dimensional systems; exact diagonalisation; variational methods; HIGH-TEMPERATURE SUPERCONDUCTIVITY; 2-DIMENSIONAL HUBBARD-MODEL; ONE-DIMENSIONAL CA3CO2O6; MEAN-FIELD THEORY; INSULATOR TRANSITIONS; MONTE-CARLO; MAGNETORESISTANCE; FERMIONS; LATTICE; DIAGONALIZATION;
D O I：
10.1002/andp.201400129
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
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.
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页码：430 / 436
页数：7
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