The end of spacetime
arXiv:2403.10694 · doi:10.1142/S0217751X23501889
Abstract
We will highlight that despite there being various approaches to quantum gravity, there are universal approach-independent features of quantum gravity. The geometry of spacetime becomes an emergent structure, which emerges from some purely quantum gravitational degrees of freedom. We argue that these quantum gravitational degrees of freedom can be best understood using quantum information theory. Various approaches to quantum gravity seem to suggest that quantum gravity could be a third quantized theory, and such a theory would not be defined in spacetime, but rather in an abstract configuration space of fields. This supports the view that spacetime geometry is not fundamental, thus effectively ending the spacetime description of nature.
Essay received an honorable mention in the Gravity Research Foundation Essay Competition 2023, 10 pages
References in corpus (9)
- Entanglement of Dirac fields in non-inertial frames
- A Short Review of Loop Quantum Gravity
- Quantum Graphity: a model of emergent locality
- Fuzzball solutions for black holes and D1-brane--D5-brane microstates
- Spacetime could be simultaneously continuous and discrete in the same way that information can
- Minimal Length, Friedmann Equations and Maximum Density
- Relativistic effect of entanglement in fermion-fermion scattering
- Non-singular and Cyclic Universe from the Modified GUP
- Energetics of the Quantum Graphity Universe