New R-matrices with non-additive spectral parameters and integrable models of strongly correlated fermions
arXiv:2001.05096 · doi:10.1007/JHEP03(2020)141
Abstract
We present a general formula for constructing R-matrices with non-additive spectral parameters associated with a type-I quantum superalgebra. The spectral parameters originate from two one-parameter families of inequivalent finite-dimensional irreducible representations of the quantum superalgebra upon which the R-matrix acts. Applying to the quantum superalgebra , we obtain the explicit expression for the -invariant R-matrix which is of non-difference form in spectral parameters. Using this R-matrix we derive a new two-parameter integrable model of strongly correlated electrons with pure imaginary pair hopping terms.
arXiv commentLaTex 12 pages. Improved technical description and presentation in section 2 as well as minor cosmetic changes in other places
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