TY - JOUR A1 - Busch, Thomas A1 - Englert, Bertold-Georg A1 - Rzazewski, Kazimierz A1 - Wilkens, Martin T1 - Two cold atoms in a harmonic trap N2 - Two ultracold atoms moving in a trap interact weakly at a very short distance. This interaction can be modeled by a properly regularized contact potential. We solve the corresponding time-independent Schrödinger equation under the assumption of a parabolic, spherically symmetric trapping potential. Y1 - 1998 ER -