SMuK 2021 – scientific programme

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AGPhil: Arbeitsgruppe Philosophie der Physik

AGPhil 10: Quantum Mechanics, Time and Information

AGPhil 10.1: Talk

Friday, September 3, 2021, 11:00–11:30, H3

The Measurement Problem in Quantum Mechanics and the Surjective Environment — •Fritz Wilhelm Bopp — Department Physik, Universität Siegen, Siegen, Germany

Starting with unitary quantum dynamics, we investigate how to add measurements. Quantum measurements have four essential components: the furcation, the witness production, an alignment projection, and an actual choice decision. The first two components still lie in the domain of unitary quantum dynamics. Observations tell us that witnesses are essential for measurement processes and, in our opinion, interpretations in which they are not functional can be disregarded. They play a central role in the decoherence concept. Within such a concept, the alignment projection can be based on the requirement that witnesses reaching the end of time on the wave function side and the conjugate one have to match. No projection operator is needed, and simple quantum dynamics remains sufficient. The surjective environment conjecture explains the actual choice decision. It is based on a two boundary interpretation applied to the complete quantum universe. It offers a simple way to reduce these seemingly random projections and collapses to purely deterministic unitary quantum dynamics, eliminating aspects people like Einstein considered unacceptable for a complete theory.