Quantum reference frames for gravity

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

• Caslav Brukner, University of Vienna
• Thursday 11 May 2023, 14:15-15:15
• Zoom.

If you have a question about this talk, please contact Damian Pitalua-Garcia.

We have no experimental knowledge about whether spacetime and gravity exhibit quantum phenomena or not. In this talk, I propose an “extended symmetry principle” that states that dynamical laws are invariant when changing quantum reference frames. This principle alone implies that spacetime can be placed in a quantum superposition. We study two concrete situations: a clock near a gravitational source that is in spatial superposition, and a superposition of conformally related spacetime metrics inhabited by a massive quantised Klein-Gordon field. We construct the explicit quantum frame changes and, invoking the extended symmetry principle, show how to transform to a quantum frame in which the standard theories of general relativity and quantum field theory allow the dynamics to be determined.

This talk is part of the CQIF Seminar series.

This talk is included in these lists:

• All CMS events
• CMS Events
• CQIF Seminar
• DAMTP info aggregator
• Hanchen DaDaDash
• Interested Talks
• Zoom
• bld31

Note that ex-directory lists are not shown.