Thursday, June 20, 2013

1306.4474 (Jason Doukas et al.)

Discriminating quantum field theories in curved spacetime    [PDF]

Jason Doukas, Gerardo Adesso, Stefano Pirandola, Andrzej Dragan
We initiate a program of using quantum channel discrimination to test physical theories. In particular, we focus on quantum field theories in curved spacetimes. We use the example of the Unruh effect to illustrate the principle of this approach, discriminating it against an existing alternative theory that does not predict thermal particles. We find that the usual strategy of counting particles in the vacuum can be improved on, thereby enhancing the discrimination. Coherent state probes, which are practical and feasible, give exponential improvement in the discrimination of the Unruh channel and come very close to optimal. These results are expected to be relevant to upcoming experimental tests of quantum field theory in curved spacetimes in analogue systems.
View original:

No comments:

Post a Comment