  In this paper is considered relativistic quantum field theory expressed by
elementary units of quantum information as they are considered as fundamental
entity of nature by Carl Friedrich von Weizsaecker. Through quantization of a
Weyl spinor describing an elementary unit of quantum information and consisting
of four real components one obtains four pairs of creation and annihilation
operators acting in a tensor space of states containing many units of quantum
information. There can be constructed position and momentum operators from the
creation and annihilation operators and based on these operators the Poincare
group can be represented in this abstract tensor space of quantum information.
A general state in the tensor space can be mapped to a state in Minkowski
space-time by using the position representation of the eigenstates of the
occupation number operators which correspond to the eigenstates of the harmonic
oscillator. This yields a description of relativistic quantum mechanics.
Quantization of the coefficients of a general state in the tensor space leads
to many particle theory and thus to quantum field theory.
