THE ROLE OF BOUNDARY-CONDITIONS IN THE REAL-SPACE RENORMALIZATION-GROUP

被引：10
|
作者：
MARTINDELGADO, MA [1 ]
SIERRA, G [1 ]
机构：
[1] CSIC,INST MATEMAT & FIS FUNDAMENTAL,E-28006 MADRID,SPAIN
来源：
PHYSICS LETTERS B | 1995年 / 364卷 / 01期
关键词：
D O I：
10.1016/0370-2693(95)01223-8
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We show that the failure of the real-space RG method in the 1D tight-binding model is not intrinsic to the method as considered so far but depends on the choice of boundary conditions. For fixed BCs the failure does happen, For free BCs we present a new analytical block RG-method which gives the exact ground state of the model and the correct 1/N-2-law for the energy of the first excited stare in the large N(size)-limit. We also give a reconstruction method for the wave-functions of the excited states.
引用
收藏
页码：41 / 48
页数：8
相关论文
共 50 条
12345