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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/6185
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dc.contributor.authorSinha, Supurna-
dc.contributor.authorSamuel, J.-
dc.date.accessioned2015-02-25T13:15:36Z-
dc.date.available2015-02-25T13:15:36Z-
dc.date.issued2015-01-08-
dc.identifier.citationClassical and Quantum Gravity, 2015, Vol.32, p015018en
dc.identifier.issn0264-9381-
dc.identifier.issn1361-6382 (E)-
dc.identifier.urihttp://hdl.handle.net/2289/6185-
dc.descriptionRestricted Access. An open-access version is available at arXiv.org (one of the alternative locations)en
dc.description.abstractGood clocks are of importance both to fundamental physics and for applications in astronomy, metrology and global positioning systems. In a recent technological breakthrough, researchers at NIST have been able to achieve a stability of one part in 1018 using an ytterbium clock. This naturally raises the question of whether there are fundamental limits to time keeping. In this article we point out that gravity and quantum mechanics set a fundamental limit on the fractional frequency uncertainty of clocks. This limit comes from a combination of the uncertainty relation, the gravitational redshift and the relativistic time dilation effect. For example, a single ion aluminium clock in a terrestrial gravitational field cannot achieve a fractional frequency uncertainty better than one part in 1022. This fundamental limit explores the interaction between gravity and quantum mechanics on a laboratory scale.en
dc.language.isoenen
dc.publisherIOP Publishing Ltd.en
dc.relation.urihttp://arxiv.org/abs/1401.0774en
dc.relation.urihttp://dx.doi.org/10.1088/0264-9381/32/1/015018en
dc.relation.urihttp://adsabs.harvard.edu/abs/2015CQGra..32a5018Sen
dc.rights2015 IOP Publishing Ltd.en
dc.subjectTime keepingen
dc.subjectquantum limiten
dc.subjectgravitational fielden
dc.titleQuantum limit on time measurement in a gravitational fielden
dc.typeArticleen
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