Critical parameters for non-hermitian Hamiltonians

被引：5
|
作者：
Fernandez, Francisco M. [1 ]
Garcia, Javier [1 ]
机构：
[1] UNLP, CCT La Plata CONICET, INIFTA, Div Quim Teor, RA-1900 La Plata, Buenos Aires, Argentina
来源：
APPLIED MATHEMATICS AND COMPUTATION | 2014年 / 247卷
关键词：
PT symmetry; Non-hermitian Hamiltonians; Critical parameters; Exceptional points; Diagonalization method; EXCEPTIONAL POINTS; SQUARE-WELL; SPONTANEOUS BREAKDOWN; SYMMETRY; OPERATOR;
D O I：
10.1016/j.amc.2014.08.083
中图分类号：
O29 [应用数学];
学科分类号：
070104 ;
摘要：
We calculate accurate critical parameters for a class of non-hermitian Hamiltonians by means of the diagonalization method. We study three one-dimensional models and two perturbed rigid rotors with PT symmetry. One of the latter models illustrates the necessity of a more general condition for the appearance of real eigenvalues that we also discuss here. (C) 2014 Elsevier Inc. All rights reserved.
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页码：141 / 151
页数：11
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