University of Cambridge > Talks.cam > CQIF Seminar > Beyond the quantum

Beyond the quantum

Add to your list(s) Download to your calendar using vCal

If you have a question about this talk, please contact Ashley Montanaro.

According to the pilot-wave theory of de Broglie and Bohm (a ‘hidden-variables theory’), quantum physics is a special ‘equilibrium’ case of a much wider ‘nonequilibrium’ physics. This wider physics, which may have existed in the early universe, allows for superluminal signalling and violations of the uncertainty principle. Relativity, too, emerges only in the equilibrium state. After a brief account of the search for violations of quantum mechanics in a cosmological context (on the assumption that the universe started out in a state of ‘quantum nonequilibrium’), we address the consequences of this wider physics for quantum information and computation. Standard protocols for quantum key distribution become insecure, but rigorous consequences for computation remain to be worked out.

This talk is part of the CQIF Seminar series.

Tell a friend about this talk:

This talk is included in these lists:

Note that ex-directory lists are not shown.

 

© 2006-2020 Talks.cam, University of Cambridge. Contact Us | Help and Documentation | Privacy and Publicity