Time, Gauge, and the Superposition Principle in Quantum Gravity
General Relativity and Quantum Cosmology
2007-05-23 v1 Quantum Physics
Abstract
The quantization of time-reparametrization invariant systems such as general relativity is plagued by an ambiguity relating to the role of time in the theory. If one parametrizes observables by the (unobservable) time, and then relies on the existence of an approximate "clock" degree of freedom to give physical meaning to the observables, one finds multiple quantum states that yield the same predictions yet interfere with each other.
Cite
@article{arxiv.gr-qc/9711056,
title = {Time, Gauge, and the Superposition Principle in Quantum Gravity},
author = {Steven Weinstein},
journal= {arXiv preprint arXiv:gr-qc/9711056},
year = {2007}
}
Comments
3 pages, LaTeX. Requires mprocl.sty, available at ftp://shemesh.fiz.huji.ac.il/pub/mprocl.sty . To be published in the proceedings of the Eighth Marcel Grossmann Meeting on General Relativity. (Jerusalem, June, 1997)