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.

引用

页码：430 / 436

页数：7

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