1110.6475 (Luc Vinet et al.)

Para-Krawtchouk polynomials on a bi-lattice and a quantum spin chain
with perfect state transfer    [PDF]

Luc Vinet, Alexei Zhedanov

Analogs of Krawtchouk polynomials defined on a bi-lattice are introduced. They are shown to provide a (novel) spin chain with perfect transfer. Their characterization is given as well as their connection to the quadratic Hahn algebra

View original: http://arxiv.org/abs/1110.6475