A manifestly covariant and local canonical operator formalism of non-Abelian gauge
theories is presented in its full detail. This formalism, applicable to Yang-Mills theories as …

Spectral and scattering theory of massive Pauli–Fierz Hamiltonians is studied. Asymptotic
completeness of these Hamiltonians is shown. The proof consists of three parts. The first is a …

Quantum Field Theory (QFT) has proved to be the most useful strategy for the description of
elementary particle interactions and as such is regarded as a fundamental part of modern …

Starting from the fact that electrically charged particles are massive, we derive a criterion
which characterizes the state space of quantum electrodynamics. This criterion clarifies the …

To begin with, some of the conundrums concerning Quantum Mechanics and its
interpretation (s) are recalled. Subsequently, a sketch of the “ETH-Approach to Quantum …

Charge operator and charged sectors in four-dimensional QED are investigated, both within
a local, covarian (indefinite metric), and within a positive metric formulation of QED …

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 …

A new approach to the analysis of the physical state space of a theory is presented within
the general setting of local quantum physics. It also covers theories with long range forces …

It is argued that the Schrödinger equation does not yield a correct description of the quantum-
mechanical time evolution of states of isolated physical systems featuring events. A general …

In models of (non-relativistic and pseudo-relativistic) electrons interacting with static nuclei
and with the (ultraviolet-cutoff) quantized radiation field, the existence of asymptotic …