  According to the adiabatic approximation atoms moving in a magnetic trap keep
their magnetic states. We investigate the validity of this approximation for
quantum condensates, where a change of field's direction generates effective
interactions between hyperfine angular momentum states. Condensates in general
traps are found to be stable because they are confined in the vicinity of the
trap center. A decay of a condensate is observable in a trap with extremely
large field gradient.
