Time, Gauge, and the Superposition Principle in Quantum Gravity

Details Time, Gauge, and the Superposition Principle in Quantum Gravity Time, Gauge, and the Superposition Principle in Quantum Gravity

1997-11-18

arxiv.org/abs/gr-qc/9711056v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

3 pages, LaTeX. Requires mprocl.sty, available at ftp://shemesh.fiz.huji.ac.il/pub/mprocl.sty . To be published in the proce

Scientific paper

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.

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