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Lee, Yuan-Harng; Links, Jon; Zhang, Yao-Zhong (2011)
Languages: English
Types: Preprint
Subjects: Mathematical Physics, Nonlinear Sciences - Exactly Solvable and Integrable Systems, Condensed Matter - Statistical Mechanics, High Energy Physics - Theory

Classified by OpenAIRE into

arxiv: Nonlinear Sciences::Exactly Solvable and Integrable Systems
The quasi-Gaudin algebra was introduced to construct integrable systems which are only quasi-exactly solvable. Using a suitable representation of the quasi-Gaudin algebra, we obtain a class of bosonic models which exhibit this curious property. These models have the notable feature that they do not preserve U(1) symmetry, which is typically associated to a non-conservation of particle number. An exact solution for the eigenvalues within the quasi-exactly solvable sector is obtained via the algebraic Bethe ansatz formalism.
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