|Exact solution of an N-sublattice vertex model|
|Bariev R. Z., Truong T. T., Turban L.|
|Journal of Physics A: Mathematical and General 25 (1992) L561|
|DOI : 10.1088/0305-4470/25/9/010|
The exact diagonalization of the diagonal-to-diagonal transfer matrix of an N-sublattice vertex model with interactions of the vertex-arrow type between sublattices is carried out using the generalized nested Bethe-ansatz method. An exact expression for the free energy is obtained involving the solution of an integral equation which is studied numerically.