Abstract

The paper proposes a model of a unitary quantum field theory where the particle is represented as a wave packet.
The frequency dispersion equation is chosen so that the packet periodically appears and disappears without
changing its form. The envelope of the process is identified with a conventional wave function. Equation of such
a field is nonlinear and relativistically invariant. With proper adjustments, they are reduced to Dirac, Schrödinger
and Hamilton-Jacobi equations. A number of new experimental effects are predicted both for high and low
energies.

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