3 papers
hep-th2025
The Problem of Time and its Quantum Resolution
Marc S. Klinger, Robert G. Leigh
In this essay, we argue that the problem of time should not be regarded as an issue to be resolved within the prevailing framework for studying quantum gravity, but rather as an in…
hep-th2024
Quantum Null Geometry and Gravity
Luca Ciambelli, Laurent Freidel, Robert G. Leigh
In this work, we demonstrate that quantizing gravity on a null hypersurface leads to the emergence of a CFT associated with each null ray. This result stems from the ultralocal nat…
hep-th2024
Relational Quantum Geometry
Shadi Ali Ahmad, Wissam Chemissany, Marc S. Klinger +1
A common feature of the extended phase space of gauge theory, the crossed product of quantum theory, and quantum reference frames (QRFs) is the adjoining of degrees of freedom foll…