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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