A model of quantum spacetime

Tommaso Favalli, Augusto Smerzi

AVS Quantum Sci. 4, 044403 (2022), 2022

Abstract

We consider a global quantum system (the "Universe") satisfying a double constraint, both on total energy and total momentum. Generalizing the Page and Wootters quantum clock formalism, we provide a model of 3+1 dimensional, non-relativistic, quantum spacetime emerging from entanglement among different subsystems in a globally "timeless" and "positionless" Universe.

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