Quantum entanglement with Freedman's inequality

Quantum entanglement with Freedman's inequality The assumption of local realism imposes constraints, such as Bell inequalities, onquantities obtained from measurements. In recent years, various tests of local realismhave gained popularity in undergraduate laboratories, giving students the excitingopportunity to experimentally contradict this philosophical assumption. The standard testof the CHSH (Clauser–Horne–Shimony–Holt) Bell inequality requires 16 measurements, whereasa test of Freedman's inequality requires only three measurements. The calculationsrequired to test Freedman's inequality are correspondingly simpler and the theory is lessabstract. We suggest that students may benefit from testing Freedman's inequality beforeproceeding to the CHSH inequality and other more complicated experiments. Our measureddata violated Freedman's inequality by more than six standard deviations. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png American Journal of Physics American Association of Physics Teachers

Quantum entanglement with Freedman's inequality

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Publisher
American Association of Physics Teachers
Copyright
© 2018 American Association of Physics Teachers.
ISSN
0002-9505
D.O.I.
10.1119/1.5036619
Publisher site
See Article on Publisher Site

Abstract

The assumption of local realism imposes constraints, such as Bell inequalities, onquantities obtained from measurements. In recent years, various tests of local realismhave gained popularity in undergraduate laboratories, giving students the excitingopportunity to experimentally contradict this philosophical assumption. The standard testof the CHSH (Clauser–Horne–Shimony–Holt) Bell inequality requires 16 measurements, whereasa test of Freedman's inequality requires only three measurements. The calculationsrequired to test Freedman's inequality are correspondingly simpler and the theory is lessabstract. We suggest that students may benefit from testing Freedman's inequality beforeproceeding to the CHSH inequality and other more complicated experiments. Our measureddata violated Freedman's inequality by more than six standard deviations.

Journal

American Journal of PhysicsAmerican Association of Physics Teachers

Published: Jun 8, 2018

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