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Reference: Knee, GC, Gauger, EM, Briggs, GAD et al., (2012). Comment on 'A scattering quantum circuit for measuring Bell's time inequality: a nuclear magnetic resonance demonstration using maximally mixed states'. New Journal of Physics, 14 (5), Article: 058001.Citable link to this page:

 

Comment on 'A scattering quantum circuit for measuring Bell's time inequality: a nuclear magnetic resonance demonstration using maximally mixed states'

Abstract: A recent paper by Souza, Oliveira and Sarthour (SOS) reports the experimental violation of a Leggett–Garg (LG) inequality (sometimes referred to as a temporal Bell inequality). The inequality tests for quantum mechanical superposition: if the inequality is violated, the dynamics cannot be explained by a large class of classical theories under the heading of macrorealism. Experimental tests of the LG inequality are beset by the difficulty of carrying out the necessary so-called 'non-invasive' measurements (which for the macrorealist will extract information from a system of interest without disturbing it). SOS argue that they nevertheless achieve this difficult goal by putting the system in a maximally mixed state. The system then allegedly undergoes no perturbation during their experiment. Unfortunately, the method is ultimately unconvincing to a skeptical macrorealist and so the conclusions drawn by SOS are unjustified.

Peer Review status:Peer reviewedPublication status:PublishedVersion:Publisher's versionNotes:Copyright IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. Authors, their institutions and third parties all have the same rights to reuse articles published in New Journal of Physics in accordance with the Creative Commons Attribution 3.0 Unported (CC-BY) license. This allows the articles to be shared, adapted and made commercial use of subject to appropriate attribution.

Bibliographic Details

Publisher: IOP Publishing

Publisher Website: http://ioppublishing.org/

Journal: New Journal of Physicssee more from them

Publication Website: http://iopscience.iop.org/1367-2630

Issue Date: 2012-05

pages:Article: 058001Identifiers

Urn: uuid:052f10d7-a1bf-4d6b-897e-3a7579713325

Source identifier: 342030

Eissn: 1367-2630

Doi: https://doi.org/10.1088/1367-2630/14/5/058001

Issn: 1367-2630 Item Description

Type: Journal article;

Language: aa

Version: Publisher's version Tiny URL: pubs:342030

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Autor: Knee, GC - institutionUniversity of Oxford - - - Gauger, EM - institutionUniversity of Oxford - - - Briggs, GAD - institutionUniv

Fuente: https://ora.ox.ac.uk/objects/uuid:052f10d7-a1bf-4d6b-897e-3a7579713325



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