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Relativity of quantum states and observables

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JournalEPL (Europhysics Letters)
DateSubmitted - 2016
DateAccepted/In press - 21 Mar 2017
DateE-pub ahead of print (current) - 4 Apr 2017
Volume117
Number of pages5
Early online date4/04/17
Original languageEnglish

Abstract

Under the principle that quantum mechanical observables are invariant under relevant symmetry transformations, we explore how the usual, non-invariant quantities may capture measurement statistics. Using a relativisation mapping, viewed as the incorporation of a quantum reference frame, we show that the usual quantum description approximates the relative one precisely when the reference system admits an appropriate localisable quantity and a localised state. From this follows a new perspective on the nature and reality of quantum superpositions and optical coherence.

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© EPLA, 2017. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details

    Research areas

  • quantum mechanics, symmetry, quantum reference frames

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