publication . Preprint . 2015

Tight Bound on Randomness for Violating the CHSH Inequality

Teng, Yifeng; Yang, Shenghao; Wang, Siwei; Zhao, Mingfei;
Open Access English
  • Published: 21 Apr 2015
Abstract
Free will (or randomness) has been studied to achieve loophole-free Bell's inequality test and to provide device-independent quantum key distribution security proofs. The required randomness such that a local hidden variable model (LHVM) can violate the Clauser-Horne-Shimony-Holt (CHSH) inequality has been studied, but a tight bound has not been proved for a practical case that i) the device settings of the two parties in the Bell test are independent; and ii) the device settings of each party can be correlated or biased across different runs. Using some information theoretic techniques, we prove in this paper a tight bound on the required randomness for this ca...
Subjects
free text keywords: Quantum Physics
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