CORRELATED WORLDLINE THEORY and GRAVITATIONAL DECOHERENCE in SOLID STATE SYSTEMS

Speaker: 
Prof. Phil Stamp (UBC)
Event Date and Time: 
Mon, 2013-12-02 12:00 - 13:00
Location: 
Room 318 Hennings
There are fundamental differences between (i) gravity and (ii) quantum mechanics/quantum field theory, which have blocked all attempts to find an experimentally testable theory of quantum gravity. Here I describe a theory (the correlated worldline theory) in which correlations between paths in a path integral, mediated by gravity, cause a gradual breakdown of the superposition principle, and lead to testable consequences for experiments in condensed matter systems (notably in optomechanical systems). These will appear in the form of ‘gravitational decoherence’ in the large-scale quantum dynamics of these systems. The theoretical predictions have no adjustable parameters, and experiments being currently built should be operational in the next few years – I will discuss several of these experiments.
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