Investigation of an Open Quantum Mechanical System

The distinction between internal and external time is used in order to interpret the nuclear psics studies on the basis of the continuum shell model from the point of view of selforganization. A constraint operator consisting of a stochastic part and a dynamical part is defined. The interplay of both parts is investigated by means of numerical results obtained in the model. Conservative as well as dissipative structures in space and time are formed. Dissipative structures are characterized by a loss of information on the system while, simultaneously, information on the environment appears via the dynamical part of the constraint operator. The competition of structures is numerically investigated as well as the acceleration of improbable processes by the dynamical part. Irreversibility appears on a microscopic level.