University of Cambridge > Talks.cam > CQIF Seminar > The Link between Uncertainty Relations and Non-Locality

The Link between Uncertainty Relations and Non-Locality

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Two of the most intriguing features of quantum physics are the uncertainty principle and the occurrence of non-local correlations. The uncertainty principle states that there exist pairs of non-compatible measurements on quantum systems such that their outcomes cannot be simultaneously predicted by any observer. Non-local correlations of measurement outcomes at different locations cannot be explained by classical physics, but appear in quantum mechanics in the presence of entanglement. I will show that these two essential properties of quantum mechanics are quantitatively related. Namely, we provide an entropic uncertainty relation that gives a lower bound on the uncertainty of the binary outcomes of two measurements in terms of the maximum Clauser-Horne-Shimony-Holt value that can be achieved using the same measurements. I will discuss an application of this uncertainty relation to certify a quantum source using untrusted devices.

This talk is part of the CQIF Seminar series.

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