Guan, Xi-Wen, Grimm, Uwe, Roemer, Rudolf A. and Schreiber, Michael (2000) Integrable impurities for an open fermion chain. Journal of Physics A: Mathematical and General, 33 (21). pp. 3863-3879. doi:10.1088/0305-4470/33/21/302 ISSN 0305-4470.

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Abstract

Employing the graded versions of the Yang-Baxter equation and the reflection equations, we construct two kinds of integrable impurities for a small-polaron model with general open boundary conditions: (a) we shift the spectral parameter of the local Lax operator at arbitrary sites in the bulk and (b) we embed the impurity fermion vertex at each boundary of the chain. The Hamiltonians with different types of impurity terms are given explicitly. The Bethe ansatz equations, as well as the eigenvalues of the Hamiltonians, are constructed by means of the quantum inverse scattering method. In addition, we discuss the ground-state properties in the thermodynamic limit.

Item Type:	Journal Article
Subjects:	Q Science > QC Physics
Divisions:	Faculty of Science, Engineering and Medicine > Science > Physics
Journal or Publication Title:	Journal of Physics A: Mathematical and General
Publisher:	IOP Publishing
ISSN:	0305-4470
Official Date:	2000
Dates:	Date Event 2000 Published
Volume:	33
Number:	21
Page Range:	pp. 3863-3879
DOI:	10.1088/0305-4470/33/21/302
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access

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