Quantum Mechanics of Successive Measurements with Arbitrary Meter Coupling
Lars M. Johansen, Pier A. Mello
TL;DR
This paper investigates successive quantum measurements with arbitrary coupling strengths, demonstrating how initial states can be reconstructed and classical formulas emerge in specific limits, unifying various measurement theories.
Contribution
It introduces a comprehensive analysis of successive measurements with arbitrary coupling, connecting different quantum measurement frameworks within a unified model.
Findings
Successive measurements can retrieve the initial system state.
Luders rule, Wigner formula, and Kirkwood-Dirac distribution are recovered in specific limits.
The model unifies various measurement approaches in quantum mechanics.
Abstract
We study successive measurements of two observables using von Neumann's measurement model. The two-pointer correlation for arbitrary coupling strength allows retrieving the initial system state. We recover Luders rule, the Wigner formula and the Kirkwood-Dirac distribution in the appropriate limits of the coupling strength.
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