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Clock-dependent spacetime
Journal article

Clock-dependent spacetime

Abstract

Einstein’s theory of general relativity is based on the premise that the physical laws take the same form in all coordinate systems. However, it still presumes a preferred decomposition of the total kinematic Hilbert space into local kinematic Hilbert spaces. In this paper, we consider a theory of quantum gravity that does not come with a preferred partitioning of the kinematic Hilbert space. It is pointed out that, in such a theory, dimension, signature, topology and geometry of spacetime depend on how a collection of local clocks is chosen within the kinematic Hilbert space.

Authors

Lee S-S

Journal

Journal of High Energy Physics, Vol. 2021, No. 4,

Publisher

Springer Nature

Publication Date

April 1, 2021

DOI

10.1007/jhep04(2021)204

ISSN

1126-6708

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