FAU^2 Mini-Workshop on Loop Quantum Gravity

Session

Session 1

2 May 2023, 14:15

ECAP Laboratory Building

6. Symmetry charges in reduced phase space and their algebra

Hongwei Tan

02/05/2023, 14:15

The investigation of boundary charges in asymptotically flat spacetime drew a lot of attention in recent years, which has provided us valuable insight and significantly enhanced our general understanding of gravity. However, most of previous studies along this line are based on the traditional general relativity, which is a pure constraint theory in the bulk. The boundary charges based on the...

3. Edge modes and quantum reference frames in linearized gravity

Wolfgang Wieland

02/05/2023, 15:15

A common way to interpret the coordinate invariance of Einstein’s equations is to say that coordinates are a mere gauge redundancy and play no physical role themselves. This is no longer true when we restrict ourselves to subsystems localized in a compact but otherwise arbitrary domain. At the boundary of the domain, coordinate transformations are no longer gauge redundant. The then necessary...