4 ms·
This is a really well written paper. I especially like their review of Heisenberg's original uncertainty relation, which had already been shown to be incorrect
by fjorder 14y ago
This is a really well written paper. I especially like their review of Heisenberg's original uncertainty relation, which had already been shown to be incorrect in theory under certain conditions, and the modern uncertainty principle that still holds. (They then experimentally violate the former, not the latter.)
Why should anyone care? Well, some security proofs for quantum cryptographical systems out there could conceivably assume the original relation holds, and would therefore require correction. Not to go into too much detail, this might have an impact on the bit-rate that some quantum crypto systems can securely run at.
- Daniel_Newby 14y agoI don't have free access to the paper. Could you tell me if the measurement-disturbance violation they show is a version of the quantum nondemolition measurement approach?
- cgs1019 14y agoHere's the preprint: http://arxiv.org/pdf/1208.0034.pdf http://arxiv.org/pdf/1208.0034.pdf
- Daniel_Newby 14y agoHere's a more accessible article from the Beeb: http://www.bbc.co.uk/news/science-environment-19489385 http://www.bbc.co.uk/news/science-environment-19489385