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Frontiers in Optics

The Challenges of Quantum Physics as Pedagogical Tools

Arthur Zajonc

Published Jan 1, 2008• 0 citations
Publisher

Abstract

Recent developments in quantum optics have made the thought experiments of past the undergraduate lab experiments of today. The teacher has a rich array of observations to illustrate the most challenging concepts of quantum theory.
DOI
10.1364/fio.2008.sthb2

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Wigner's thought experiment illustrates quantum theory's measurement problem by considering an observer who measures a quantum system inside a sealed lab, modeled unitarily by an outsider. Recent extensions of this thought experiment, referred to as extended Wigner's friend arguments, question how different observers can reason consistently about each other in quantum setups, and challenge the absoluteness of the outcome value obtained by the friend under a notion of locality. In this work, we present an argument against the absoluteness of free choices under the same notion of locality, using an extended Wigner's friend scenario based on the Pusey--Barrett--Rudolph theorem. Similar arguments based on other contextuality or nonlocality models are possible.