The next Q+ Hangout is on the 10th of December!

As usual, if you are watching with a group and want to reserve a seat in the hangout then leave a comment on the event page:
https://plus.google.com/events/ci3istfmkg1m20sh6fcsr2vik6o

We also encourage individuals interested in active participation---which typically involves asking questions after the talk---to join the hangout. Otherwise you can watch on the livestream. Details follow.

Speaker: Antonio Acin, ICFO Barcelona

Date: 2 pm UTC on December 10, 2015

Title: Randomness certification in quantum and general non-signalling theories

Abstract: The non-local correlations observed among entangled quantum particles can be used to certify the presence of randomness in a device-independent way. We first introduce the main concepts and tools in this scenario. We then overview some of our recent results connecting certified randomness and non-locality. In particular, we (i) give quantum setups allowing for maximal randomness certification, that is, the outcomes obtained when measuring N devices define N random bits; (ii) prove that maximal randomness certification is impossible in general non-signalling theories; (iii) provide schemes to attain optimal randomness certification from two-qubit entangled states using general (non-projective) measurements; and (iv) show that an unbounded amount of randomness can be certified in a device-independent way using sequence of measurements.

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