Good morning,
This year's final seminar talk will be given by Stephanie Wehner from CQT in Singapore:
Tuesday, Dec. 21, 16.30, in HIT J 52 on Hoenggerberg.
Best regards, Stefan
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The uncertainty principle determines the non-locality of quantum mechanics
Two central concepts of quantum mechanics are Heisenberg's uncertainty principle, and a subtle form of non-locality that Einstein famously called "spooky action at a distance". These two fundamental features have thus far been distinct concepts. Here we show that they are inextricably and quantitatively linked. Quantum mechanics cannot be more non-local with measurements that respect the uncertainty principle. In fact, the link between uncertainty and non-locality holds for all physical theories. More specifically, the degree of non-locality of any theory is determined by two factors the strength of the uncertainty principle, and the strength of a property called "steering," which determines which states can be prepared at one location given a measurement at another.
Joint work with Jonathan Oppenheim.
arXiv:1004.2507
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