97-516 Avron J. E. and Berger J.
Adiabatic Response of Quantum Systems Pinching a Gap Closure (37K, tarred, gzipped and uuencoded; revtex file and 1 postcript file) Sep 21, 97
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Abstract. A vanishing cause can lead to a large response in quantum systems which undergo cyclic deformations that pinch a point of level crossing. We call such behavior homeopathic. We illustrate this behavior by studying charge circulation in quantum models of necklaces of atoms driven by a running wave of small amplitude.

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