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Published December 1984 | public
Journal Article

Semiclassical analysis of low lying elgenvalues. III. Width of the ground state band in strongly coupled solids

Abstract

A smooth periodic potential, V, with one minima per unit cell, is considered. Let Δ(λ) be the width of the ground state band for −Δ + λ^2V. It is rigorously proved that lim(λ→∞) − λ^(−1) ln Δ(λ) is given by the minimum action among all instantons connecting two distinct minima of V.

Additional Information

© 1984 Published by Elsevier. Received January 17. 1984. Research partially supported by USNSF Grant MCS-81-20833. It is a pleasure to thank J. Keller and M. Weinstein for discussions which stimulated this work.

Additional details

Created:
August 19, 2023
Modified:
October 18, 2023