Double butterfly spectrum for two interacting particles in the Harper model

Дата и время публикации : 1996-09-15T18:35:15Z

Авторы публикации и институты :
Armelle Barelli (Laboratoire de Physique Quantique, Université Paul Sabatier, Toulouse, France)
Jean Bellissard (Laboratoire de Physique Quantique, Université Paul Sabatier, Toulouse, France)
Philippe Jacquod (Laboratoire de Physique Quantique, Université Paul Sabatier, Toulouse, France)
Dima L. Shepelyansky (Laboratoire de Physique Quantique, Université Paul Sabatier, Toulouse, France)

Ссылка на журнал-издание: Ссылка на журнал-издание не найдена
Коментарии к cтатье: revtex, 4 pages, 5 figures
Первичная категория: cond-mat

Все категории : cond-mat

Краткий обзор статьи: We study the effect of interparticle interaction $U$ on the spectrum of the Harper model and show that it leads to a pure-point component arising from the multifractal spectrum of non interacting problem. Our numerical studies allow to understand the global structure of the spectrum. Analytical approach developed permits to understand the origin of localized states in the limit of strong interaction $U$ and fine spectral structure for small $U$.

Category: Physics