A description of pseudo-bosons in terms of nilpotent Lie algebras

JOURNAL OF GEOMETRY AND PHYSICS

卷:125

Article

Bagarello, Fabio^1,2  Russo, Francesco G.³ 

[1] Univ Palermo, Scuola Politecn Univ, Dipartimento Energia Ingn Informaz & Modelli Mate, Viale Sci, I-90128 Palermo, Italy

[2] Ist Nazl Fis Nucl, Via Cinthia, Naples, Italy

[3] Univ Cape Town, Dept Math & Appl Math, Private Bag X1, ZA-7701 Cape Town, South Africa

关键词: Pseudo-bosonic operators;    Hilbert space;    Schur multiplier;    Lie algebras;    Swanson model;   

DOI  :  10.1016/j.geomphys.2017.12.002

来源: Elsevier

【 摘 要 】

We show how the one-mode pseudo-bosonic ladder operators provide concrete examples of nilpotent Lie algebras of dimension five. It is the first time that an algebraic geometric structure of this kind is observed in the context of pseudo-bosonic operators. Indeed we do not find the well known Heisenberg algebras, which are involved in several quantum dynamical systems, but different Lie algebras which may be decomposed into the sum of two abelian Lie algebras in a prescribed way. We introduce the notion of semidirect sum (of Lie algebras) for this scope and find that it describes very well the behavior of pseudobosonic operators in many quantum models. (C) 2017 Elsevier B.V. All rights reserved.

【 授权许可】

Free