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Simple trace criterion for classification of multilayers

L. L. Sanchez-Soto, J. J. Monzon, T. Yonte, J. F. Carinena

quant-pharXiv:quant-ph/0108028

Abstract

The action of any lossless multilayer is described by a transfer matrix that can be factorized in terms of three basic matrices. We introduce a simple trace criterion that classifies multilayers in three classes with properties closely related with one (and only one) of these three basic matrices.

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