An exploration of the limits of control using quantum superpositions

Abstract

Quantum interferences between non-orthogonal states are the best approximation of a joint realization of the non-commuting physical properties represented by the two states. As I have shown recently, such interferences can be used to demonstrate that quantum physics deviates from classical causality in the limit of small action. Here, I point out that this proof constitutes a failure of the principle of least action and consider possible implications for our understanding of fundamental physics.

arXiv comment4 pages, contribution to the proceedings of QIT 38, held June 4th to 5th 2018 in Hiroshima

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