Discrete breathers are localized excitations on lattices. Nonlinear interactions lead to oscillation frequencies outside the phonon bands. When these breathers occur in a quantum context the system may survive $10^9$ times its natural time scale and may be a medium suitable for quantum information. To evaluate this possibility the level structure and quantum stability of the excitation must be studied. The physical system that I focus on is a doped alkali halide in which the breather is created when it acquires a Jahn-Teller-induced distortion. For the level structure, I use EBK quantization, a multi-dimensional generalization of WKB. The issue of stability has been the subject of controversy and I show the breather to be stable against all but tunneling, using both path integral and numerical diagonalization methods.

Clarkson University et SPhT