No enhancement of the localization length for two interacting particles in a random potential
Rudolf A. R"omer, Michael Schreiber
Abstract
We study two interacting particles in a random potential chain by means of the transfer matrix method. The dependence of the two-particle localization length λ2 on disorder and interaction strength is investigated. Our results demonstrate that the recently proposed enhancement of λ2 as compared to the results for single particles is entirely due to the finite size of the systems considered. This is shown for a Hubbard-like onsite interaction and also a long-range interaction.
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