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dc.contributor.authorRowe, MAen_US
dc.contributor.authorKielpinski, Den_US
dc.contributor.authorMeyer, Ven_US
dc.contributor.authorSackett, CAen_US
dc.contributor.authorItano, WMen_US
dc.contributor.authorMonroe, Cen_US
dc.contributor.authorWineland, DJen_US
dc.description.abstractLocal realism is the idea that objects have dete properties whether or not they are measured, and that measurements of these properties are not affected by events taking place sufently far away1. Einstein, Podolsky and Rosen2 used these reasonable assumptions to conclude that quantum mechanics is incomplete. Starting in 1965, Bell and others constructed mathematical inequalities whereby experimental tests could distinguish between quantum mechanics and local realistic theories1,3ᵮ Many experiments1,6ᱵ have since been done that are consistent with quantum mechanics and inconsistent with local realism. But these conclusions remain the subject of considerable interest and debate, and experiments are still being red to overcome `loopholes' that might allow a local realistic interpretation. Here we have measured correlations in the classical properties of massive entangled particles (9Be+ ions): these correlations violate a form of Bell's inequality. Our measured value of the appropriate Bell's `signal' is 2:25 6 0:03, whereas a value of 2 is the maximum allowed by local realistic theories of nature. In contrast to previous measurements with massive particles, this violation of Bell's inequality was obtained by use of a complete set of measurements. Moreover, the high detection efency of our apparatus eliminates the so-called `detection' loophole.en_US
dc.publisherNature Publishing Groupen_US
dc.titleExperimental violation of a Bell's inequality with efficient detectionen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.hasfulltextNo Full Text

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