N ov 2 00 8 Polaron Properties of an Impurity in Bose-Einstein-Condensation

Abstract

In this paper we study an impurity in Bose-Einstein-Condensate system at T = 0K and suppose the contact forms for boson-boson and boson-impurity interactions. Using Bogoliubov theory and a further approximation corresponding to only think over the forward scattering of impurity by bosons, we derive a reduced Hamiltonian whose form is the same as the Fr… (More)

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