PIRSA:10030061

Where is the quantum particle between two measurements

Vaidman, L. (2010). Where is the quantum particle between two measurements. Perimeter Institute. https://pirsa.org/10030061

Vaidman, Lev. Where is the quantum particle between two measurements. Perimeter Institute, Mar. 16, 2010, https://pirsa.org/10030061 

          @misc{ pirsa_PIRSA:10030061,
            doi = {10.48660/10030061},
            url = {https://pirsa.org/10030061},
            author = {Vaidman, Lev},
            keywords = {Quantum Foundations},
            language = {en},
            title = {Where is the quantum particle between two measurements},
            publisher = {Perimeter Institute},
            year = {2010},
            month = {mar},
            note = {PIRSA:10030061 see, \url{https://pirsa.org}}
          }

Lev Vaidman Tel Aviv University

DOI 10.48660/10030061
Collection
Talk Type Scientific Series
Subject

Abstract

The Wheeler delayed choice experiment, Elitzur-Vaidman interaction-free measurement, and Hosten-Kwiat counterfactual computation will be discussed to answer Bohr's forbidden question: "Where is a quantum particle while it is inside a Mach-Zehnder Interferometer?". I will argue that the naive application of Wheeler's approach fails to explain a weak trace left by the particle and that the two-state vector description is required.