Three notions are introduced as a help in discussing the notion of particle in relativistic
quantum field theory: particle interpretation, simple particle interpretation, and relevant …

The arguments leading to the formulation of the action principle for a general field are
presented. In association with the complete reduction of all numerical matrices into …

Quantum mechanical operators are interpreted according to their equations of motion.
Operators representing physical quantities which have classical analog are constructed by …

In a unitary field theory particles appear not as singularities but as small volumes in which
energy and charge of the field are concentrated. In a theory of this nature, which is …

The general theory of relativity is cast into normal Hamiltonian form in terms of two pairs of
independent conjugate field variables. These variables are explicitly exhibited and obey …

The problem of introducing a Cartesian position operator canonically conjugate to the
momentum operator into relativistic one-particle theories is investigated independent of any …

A summary of lectures is presented to give an account of a particular approach to quantum
field theory. This approach is being incorporated in some areas as an" approach from basic …

Relativistic wave equations in the Schrödinger form i∂ ψ∂ t= H ψ for particles of nonzero
mass and arbitrary spin are investigated. The wave function ψ is taken to transform …

tions that occur under the heading of" rela-tivistic invaria, nce" in theories constructed to give
a relativistically invariant description of interactions between particles. The first of …

The motion of a charged particle in a constant magnetic field is treated in both relativistic and
non-relativistic quantum theory. Operators representing the center of the orbit, which obey …