We studied the dynamical response of cylindrical and spherical double quantum dots to an external time‐dependent electric field pulse. The density matrix evolution is calculated in the constant dissipation operator approach, considering electron‐phonon and electron‐electron interaction. This dynamics is evaluated in the high delocalization regime, where the process of decoherence is dominated by relaxation rates. Such rates and their related decay times are obtained from a Fermi golden rule treatment of the interactions. We found convenient conditions for coherent emission in the cylindrical dots case, while for spherical dots the fast relaxation from excited levels destroys the coherence in a time shorter than the period of any of the involved quantum beat oscillations.