Algebraic quantum field theory provides a general, mathematically precise description of the
structure of quantum field theories, and then draws out consequences of this structure by …

Most modern physicists and philosophers would agree that a decent interpretation of
quantum mechanics should fullfil at least two criteria. Firstly, it has to elucidate the physical …

Interacting fields can be constructed as formal power series in the framework of causal
perturbation theory. The local field algebra is obtained without performing the adiabatic limit; …

A bstract A non-perturbative and exactly solvable quantum field theoretical model for a
“dressed Dirac field” is presented, that exhibits all the kinematical features of QED: an …

In the Schrödinger equation, time plays a special role as an external parameter. We show
that in an enlarged system where the time variable denotes an additional degree of freedom …

Quantum field theory is an extremely successful piece of theoretical physics. Based on few
general principles, it describes with an incredibly good precision large parts of particle …

The end of the first half of the century coincided with a notable incision in the search for
fundamental laws. The breakthrough in the handling of quantum electrodynamics had …

Particle states transforming in one of the infinite spin representations of the Poincaré group
(as classified by E. Wigner) are consistent with fundamental physical principles, but local …

We prove that superselection sectors with finite statistics in the sense of Doplicher, Haag,
and Roberts are automatically Poincaré covariant under natural conditions (eg split property …

Quantum field theory (QFT) aims at the synthesis of quantum physics with the principles of
classical field theory, in particular the principle of locality. Its main realm is the theory of …