Theoretical Division and Center for Nonlinear StudiesLos Alamos National Laboratory
Departments of Mathematics and StatisticsStanford University
Cite this article as:
Khare, A., Saxena, A. & Khare, A. Pramana - J Phys (2012) 79: 377. doi:10.1007/s12043-012-0327-0
Coupled discrete models are ubiquitous in a variety of physical contexts. We provide an extensive set of exact quasiperiodic solutions of a number of coupled discrete models in terms of Lamé polynomials of arbitrary order. The models discussed are: (i) coupled Salerno model, (ii) coupled Ablowitz–Ladik model, (iii) coupled ϕ4 model and (iv) coupled ϕ6 model. In all these cases we show that the coefficients of the Lamé polynomials are such that the Lamé polynomials can be re-expressed in terms of Chebyshev polynomials of the relevant Jacobi elliptic function.