A Hubbard model with integrable impurity
نویسندگان
چکیده
منابع مشابه
Integrable systems with impurity
After reviewing some basic properties of RT algebras, which appear to be the natural framework to deal with integrable systems in presence of an impurity, we show how any integrable system (including these possessing translation invariance) can be promoted to an integrable system with an impurity which can reflect and transmit particles. The technics allows bulk translation invariant S-matrices...
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This article is based on recent works done in collaboration with M. Mintchev, É. Ragoucy and P. Sorba. It aims at presenting the latest developments in the subject of factorization for integrable field theories with a reflecting and transmitting impurity. PACS numbers: 11.10.Kk, 11.55.Ds hep-th/0508157 LAPTH-conf-1112/05 [email protected] UMR 5108 du CNRS, associée à l’Université de Savoie.
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We investigate the optical conductivity of a Hubbard ring in presence of an impurity by means of exact diagonalization using the Lanczos algorithm. We concentrate thereby on the first excited, open shell state, i.e. on twisted boundary conditions. In the metallic phase a substantial part of the spectral weight lies in the Drude peak, σ(ω) = Dcδ(ω)+σreg . In the non-interacting system, the Drude...
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ژورنال
عنوان ژورنال: Journal of Physics A: Mathematical and Theoretical
سال: 2019
ISSN: 1751-8113,1751-8121
DOI: 10.1088/1751-8121/ab2cf4