Husain, V. (2012). Time and a Physical Hamiltonian for Quantum Gravity. Perimeter Institute for Theoretical Physics. https://pirsa.org/12050076
MLA
Husain, Viqar. Time and a Physical Hamiltonian for Quantum Gravity. Perimeter Institute for Theoretical Physics, May. 12, 2012, https://pirsa.org/12050076
BibTex
@misc{ scivideos_PIRSA:12050076,
doi = {10.48660/12050076},
url = {https://pirsa.org/12050076},
author = {Husain, Viqar},
keywords = {},
language = {en},
title = {Time and a Physical Hamiltonian for Quantum Gravity},
publisher = {Perimeter Institute for Theoretical Physics},
year = {2012},
month = {may},
note = {PIRSA:12050076 see, \url{https://scivideos.org/index.php/pirsa/12050076}}
}
I will describe an approach to the problem of time that uses dust as a time variable. The canonical theory is such that there is a true Hamiltonian with spatial diffeomorphisms as the only gauge symmetry. This feature, and the form of the Hamiltonian, suggest a model for non-perturbative quantum gravity that is computationally accessible using the formalism of loop quantum gravity.
