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arXiv:1310.4691quant-ph

Time from quantum entanglement: an experimental illustration

Ekaterina Moreva, Giorgio Brida, Marco Gramegna, Vittorio Giovannetti, Lorenzo Maccone, Marco Genovese

Abstract

In the last years several theoretical papers discussed if time can be an emergent property deriving from quantum correlations. Here, to provide an insight into how this phenomenon can occur, we present an experiment that illustrates Page and Wootters' mechanism of "static" time, and Gambini et al. subsequent refinements. A static, entangled state between a clock system and the rest of the universe is perceived as evolving by internal observers that test the correlations between the two subsystems. We implement this mechanism using an entangled state of the polarization of two photons, one of which is used as a clock to gauge the evolution of the second: an "internal" observer that becomes correlated with the clock photon sees the other system evolve, while an "external" observer that only observes global properties of the two photons can prove it is static.

arXiv comments
Journal reference
Phys. Rev. A 89, 052122 (2014)
DOI
doi:10.1103/PhysRevA.89.052122
Subjects
quant-phQuantum Physics gr-qcGeneral Relativity and Quantum Cosmology hep-thHigh Energy Physics, Theory

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Linked by 3 identifiable commenters in 3 comments across 3 threads, from Feb 2015 to May 2021. Found in 1 HN submission from Oct 2013 to Oct 2013. Open submission discussions.

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Discussed in comments3 threads

  1. An experiment caught a quantum system in the middle of a jump (2019) 1 comment

    • One experiment suggests that time is an emergent property of quantum entanglement. [1] "A static, entangled state between a clock system and the rest of the universe is perceived as evolving by internal observers that test the correlations between the two subsystems. We…

      phailhausView on HNParent context

  2. Can a Living Creature Be as Big as a Galaxy? 1 comment

    • The position that time is not a localized phenomenon is preposterous. Given the observations of relativity and the effect that local gravitational force has on passage of time, and more recent experiment and theory about time actually arising as an effect of quantum entanglement…

      ztjioView on HNParent context

  3. There exists a classical model of the photon after all 1 comment

    • Or you could just, you know, check the published experimental results: http://www.technologyreview.com/view/512281/chinese-physicis... Physicists are increasingly convinced that time is an emergent property that arises due to low level quantum effects, principally entanglement…

      john_bView on HNParent context

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