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Localization in one dimension in the presence of a pseudorandom potential is investigated. The localization length of the tight-binding model V₍u₍+u₍+₁+u₍-₁=Eu₍ with V₍= cos^ is calculated numerically and in perturbation theory for 1, for generic values of and. The similarity between the potential V₍ and random potentials increases with. It is found that for 2 all the states are localized and the localization length is equal to that of the corresponding random model while for 0<1 there are extended states. The intermediate regime 1<<2 is discussed as well.
Griniasty et al. (Mon,) studied this question.