2014/03/06 by Guy Hetzroni, Daniel Rohrlich, Hetzroni, Guy +1
Physics and Astronomy · #Quantum Mechanics and Applications #quant-ph
paper · pdf · doi:10.48550/arxiv.1403.1590
To appear in Protective Measurement: Towards a New Understanding of Quantum Mechanics, ed. Shan Gao
arxiv created 2014/03/06 · arxiv updated 2014/03/10
Protective measurements illustrate how Yakir Aharonov's fundamental insights into quantum theory yield new experimental paradigms that allow us to test quantum mechanics in ways that were not possible before. As for quantum theory itself, protective measurements demonstrate that a quantum state describes a single system, not only an ensemble of systems, and reveal a rich ontology in the quantum state of a single system. We discuss in what sense protective measurements anticipate the theorem of Pusey, Barrett, and Rudolph (PBR), stating that, if quantum predictions are correct, then two distinct quantum states cannot represent the same physical reality.