Quantum Measurement and Observable Universe

TL;DR

This paper proposes a model linking quantum measurement protocols to the universe's evolution, suggesting that the observer's choice shapes subjective reality through a time-reversed computational process.

Contribution

It introduces a novel equivalence between single-system and two-system quantum measurement schemes using a Dirac negative sea concept, connecting quantum measurement to the universe's computational history.

Findings

Equivalence of measurement protocols via negative sea filling

Universe's microstate linked to observer’s choice

Backward-in-time evolution of measurement states

Abstract

In this paper, we discuss that an observable-based single-system Copenhagen and entanglement-based two-system von Neumann measurement protocols in quantum theory can be made equivalent by considering the second part of the two-system scheme to be a Dirac-type negative sea filling up the first system. Based on this equivalence, and by considering the universe as a computational process, the choice of the apparatus state in the two-system protocol can be identified with the choice of the observable in the single-system scheme as negative sea filling up the observable universe. In particular, the measuring party's state is considered to be evolving backwards in time to the big bang as a nondeterministic computational process, which chooses the acceptable path as a time-reversal process of irreversible computation. The suggested model proposes that the prepared microstate of the universe, or reality, corresponds to the observer's choice, therefore, subjective reality. Thus, this effectively provides a specific description of the subjective universe model previously proposed, which is based on the symmetry breakdown between the Schrodinger and the Heisenberg pictures of quantum theory.