Integrable boundary conditions for the one-dimensional Hubbard model.
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Publication:2703673
DOI10.1143/JPSJ.66.2288zbMATH Open1057.82505arXivcond-mat/9708011OpenAlexW3102523830MaRDI QIDQ2703673
Author name not available (Why is that?)
Publication date: 3 April 2001
Published in: (Search for Journal in Brave)
Abstract: We discuss the integrable boundary conditions for the one-dimensional (1D) Hubbard Model in the framework of the Quantum Inverse Scattering Method (QISM). We use the fermionic R-matrix proposed by Olmedilla et al. to treat the twisted periodic boundary condition and the open boundary condition. We determine the most general form of the integrable twisted periodic boundary condition by considering the symmetry matrix of the fermionic R-matrix. To find the integrable open boundary condition, we shall solve the graded reflection equation, and find there are two diagonal solutions, which correspond to a) the boundary chemical potential and b) the boundary magnetic field. Non-diagonal solutions are obtained using the symmetry matrix of the fermionic R-matrix and the covariance property of the graded reflection equation. They can be interpreted as the SO(4) rotations of the diagonal solutions.
Full work available at URL: https://arxiv.org/abs/cond-mat/9708011
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