Schr\"odinger's Black Hole Cat
- URL: http://arxiv.org/abs/2204.00384v2
- Date: Tue, 1 Nov 2022 03:30:58 GMT
- Title: Schr\"odinger's Black Hole Cat
- Authors: Joshua Foo, Robert B. Mann, Magdalena Zych
- Abstract summary: We show how to describe such "spacetime superpositions" and explore effects they induce upon quantum matter.
Our approach capitalizes on standard tools of quantum field theory in curved space.
- Score: 0.0
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: In the absence of a fully-fledged theory of quantum gravity, we propose a
"bottom-up" framework for exploring quantum-gravitational physics by pairing
two of the most fundamental concepts of quantum theory and general relativity,
namely quantum superposition and spacetime. We show how to describe such
"spacetime superpositions" and explore effects they induce upon quantum matter.
Our approach capitalizes on standard tools of quantum field theory in curved
space, and allows us to calculate physical observables like transition
probabilities for a particle detector residing in curvature-superposed de
Sitter spacetime, or outside a mass-superposed black hole. Crucially, such
scenarios represent genuine quantum superpositions of spacetimes, in contrast
with superpositions of metrics which only differ by a coordinate transformation
and thus are not different according to general relativity.
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