ORCID Profile
0000-0003-0570-0156
Current Organisation
University of Oxford
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Publisher: American Physical Society (APS)
Date: 10-03-2009
Publisher: American Physical Society (APS)
Date: 05-04-2017
Publisher: Springer Science and Business Media LLC
Date: 09-12-2009
Publisher: American Physical Society (APS)
Date: 20-03-2013
Publisher: Elsevier BV
Date: 11-2004
Publisher: American Physical Society (APS)
Date: 25-06-2014
Publisher: IOP Publishing
Date: 24-11-2016
Publisher: Springer Science and Business Media LLC
Date: 08-04-2017
Publisher: American Physical Society (APS)
Date: 31-12-2009
Publisher: AIP
Date: 2008
DOI: 10.1063/1.2979028
Publisher: AIP
Date: 2008
DOI: 10.1063/1.2979019
Publisher: Proceedings of the National Academy of Sciences
Date: 14-02-2013
Abstract: One of the most striking features of quantum mechanics is the profound effect exerted by measurements alone. Sophisticated quantum control is now available in several experimental systems, exposing discrepancies between quantum and classical mechanics whenever measurement induces disturbance of the interrogated system. In practice, such discrepancies may frequently be explained as the back-action required by quantum mechanics adding quantum noise to a classical signal. Here, we implement the “three-box” quantum game [Aharonov Y, et al. (1991) J Phys A Math Gen 24(10):2315–2328] by using state-of-the-art control and measurement of the nitrogen vacancy center in diamond. In this protocol, the back-action of quantum measurements adds no detectable disturbance to the classical description of the game. Quantum and classical mechanics then make contradictory predictions for the same experimental procedure however, classical observers are unable to invoke measurement-induced disturbance to explain the discrepancy. We quantify the residual disturbance of our measurements and obtain data that rule out any classical model by ≳7.8 standard deviations, allowing us to exclude the property of macroscopic state definiteness from our system. Our experiment is then equivalent to the test of quantum noncontextuality [Kochen S, Specker E (1967) J Math Mech 17(1):59–87] that successfully addresses the measurement detectability loophole.
Publisher: Elsevier BV
Date: 06-2005
Publisher: Verein zur Forderung des Open Access Publizierens in den Quantenwissenschaften
Date: 14-07-2017
Abstract: Macro-realism is the position that certain macroscopic observables must always possess definite values: e.g. the table is in some definite position, even if we do not know what that is precisely. The traditional understanding is that by assuming macro-realism one can derive the Leggett-Garg inequalities, which constrain the possible statistics from certain experiments. Since quantum experiments can violate the Leggett-Garg inequalities, this is taken to rule out the possibility of macro-realism in a quantum universe. However, recent analyses have exposed loopholes in the Leggett-Garg argument, which allow many types of macro-realism to be compatible with quantum theory and hence violation of the Leggett-Garg inequalities. This paper takes a different approach to ruling out macro-realism and the result is a no-go theorem for macro-realism in quantum theory that is stronger than the Leggett-Garg argument. This approach uses the framework of ontological models: an elegant way to reason about foundational issues in quantum theory which has successfully produced many other recent results, such as the PBR theorem.
Publisher: Elsevier BV
Date: 05-2017
Publisher: Springer Science and Business Media LLC
Date: 03-2005
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Owen Maroney.