title: Three-body problem in a dilute bose-Einstein condensate.
abstract: We derive the explicit three-body contact potential for a dilute condensed Bose gas from microscopic theory. The three-body coupling constant exhibits the general form predicted by Wu [Phys. Rev. 115, 1390 (1959)]] and is determined in terms of the amplitudes of two- and three-body collisions in vacuum. In the present form, the coupling constant becomes accessible to quantitative studies which should provide the crucial link between few-body collisions and the stability of condensates with attractive two-body forces.
authors.affiliation: Clarendon Laboratory, Department of Physics, University of Oxford, Oxford, OX1 3PU, United Kingdom.
authors.forename: Thorsten
authors.initials: T
authors.lastname: Köhler