Sommaire:

The status of the wave function has been the subject of active debates since the very birth of quantum theory. What is it? Does it represent reality, or our knowledge of it? A general framework has recently been developed, allowing one to address these questions formally. In late 2011 Pusey, Barrett and Rudolph (PBR) proved a breakthrough theorem, suggesting that the knowledge interpretation was not tenable [1]. I will review these results and present new developments, showing in particular that the knowledge interpretation cannot (fully) explain the indistinguishability of nonorthogonal quantum states [2].

[1] M. F. Pusey, J. Barrett, T. Rudolph, Nat. Phys. 8, 475–478 (2012).
[2] J. Barrett et al., Phys. Rev. Lett. 112, 250403 (2014); M. S. Leifer, Phys. Rev. Lett. 112, 160404 (2014); C. Branciard, Phys. Rev. Lett. 113, 020409 (2014).

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Pour plus d'informations, merci de contacter Clusel M.