Spin lattices, state transfer, and bivariate Krawtchouk polynomials

Author:

Genest Vincent X.1,Miki Hiroshi2,Vinet Luc1,Zhedanov Alexei3

Affiliation:

1. Centre de recherches mathématiques, Université de Montréal, P.O. Box 6128, Centre-ville Station, Montréal, QC H3C 3J7, Canada.

2. Department of Electronics, Doshisha University, Kyoto 6100394, Japan.

3. Donetsk Institute for Physics and Technology, Donetsk 340114, Ukraine.

Abstract

The quantum state transfer properties of a class of two-dimensional spin lattices on a triangular domain are investigated. Systems for which the 1-excitation dynamics is exactly solvable are identified. The exact solutions are expressed in terms of the bivariate Krawtchouk polynomials that arise as matrix elements of the unitary representations of the rotation group on the states of the three-dimensional harmonic oscillator.

Publisher

Canadian Science Publishing

Subject

General Physics and Astronomy

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