Quintessence, the gravitational constant, and gravity

Takeshi Chiba
Phys. Rev. D 60, 083508 – Published 16 September 1999
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Abstract

Dynamical vacuum energy or quintessence, a slowly varying and spatially inhomogeneous component of the energy density with negative pressure, is currently consistent with observational data. One potential difficulty with the idea of quintessence is that couplings to ordinary matter should be strongly suppressed so as not to lead to observable time variations of the constants of nature. We further explore the possibility of an explicit coupling between the quintessence field and the curvature. Since such a scalar field gives rise to another gravity force of long range (H01), the solar system experiments put a constraint on the nonminimal coupling: |ξ|102.

  • Received 4 March 1999

DOI:https://doi.org/10.1103/PhysRevD.60.083508

©1999 American Physical Society

Authors & Affiliations

Takeshi Chiba

  • Department of Physics, University of Tokyo, Tokyo 113-0033, Japan

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Issue

Vol. 60, Iss. 8 — 15 October 1999

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