  The quantum theory of Ur-alternatives of Carl Friedrich von Weizsaecker tries
to constitute general quantum theory based on the concept of logical
alternatives in time. Based on this interpretation of quantum theory the
existence of free objects in space, their symmetry properties and their
interactions shall be inferred. The alternatives are represented by binary
alternatives, which are called Ur-alternatives because of their logically
fundamental character. Through Ur-alternatives as elementary quantum
theoretical units of information the Copernican revolution with respect to the
question of space is realized in a consequent way. This means that not the
objects of nature are in a given space, but the existence of space arises as a
kind of indirect representation of relations between abstract quantum
theoretical objects. The Ur-alternatives do not exist in a given physical
reality, but the existence of space is constituted by Ur-alternatives at all.
Such a concept of reality is implicitly contained within the uncertainty
relation and can be seen especially in the EPR-paradoxon. It is shown in this
thesis in a mathematical consistent way that a state in the tensor space of
many Ur-alternatives can directly be mapped into a real three dimensional space
which means that together with the dynamics a representation in a
(3+1)-dimensional space-time becomes possible. By considering the $G_2$ an
approach for the incorporation of the internal symmetries can be suggested.
Furthermore the Ur-alternatives enable the constitution of a concept of
interaction, which is based on quantum theoretical entanglement. By using this
concept it is tried to obtain a purely quantum theoretical description of
electromagnetism and gravity. This corresponds to a much more principle and in
a radical sense background independent way of quantization.
