Time variation of Newton's gravitational constant in superstring theories

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Publication Type Journal Article
School or College College of Science
Department Physics
Creator Wu, Yong-Shi
Other Author Wang, Zi
Title Time variation of Newton's gravitational constant in superstring theories
Date 1986-10
Description The present time variation of coupling constants in superstring theories with currently favorable internal backgrounds critically depends on the shape of the potential for the size of the internal space. If the potential is almost flat, as in perturbation theory to all orders, the value of G/G for Newton's gravitational constant is calculable and estimated to be - 1x10- 11 ± yr-1 . If the potential has a minimum with finite curvature due to unknown nonperturbative effects, G/G will become unobservably small. Improvement of the measurement of G/ G would discriminate between the two situations. Problems with the time variation of other coupling constants are also discussed.
Type Text
Publisher American Physical Society
Journal Title Physical Review Letters
Volume 57
Issue 16
First Page 1978
Last Page 1981
DOI 10.1103/PhysRevLett.57.1978
citatation_issn 0031-9007
Subject Gravitational constant; Time variation
Subject LCSH Superstring theories; Quantum gravity
Language eng
Bibliographic Citation Wu, Y.-S., & Wang, Z. (1986). Time variation of Newton's gravitational constant in superstring theories. Physical Review Letters, 57(16), Oct., 1978-81.
Rights Management (c) American Physical Society http://dx.doi.org/10.1103/PhysRevLett.57.1978
Format Medium application/pdf
Format Extent 341,816 bytes
Identifier ir-main,9507
ARK ark:/87278/s6x35fx9
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2021-05-06
ID 705707
Reference URL https://collections.lib.utah.edu/ark:/87278/s6x35fx9
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