Turkish Journal of Physics
DOI
10.3906/fiz-1506-25
Abstract
I point out a simple but usually overlooked fact about the cosmological constant problem: to solve the cosmological constant problem it is sufficient to find a symmetry or mechanism that sets the cosmological constant to zero or to a tiny value at some time in the past, provided that general relativity is the relevant theory of gravity, and the energy-momentum tensor (excluding the part of the form of a cosmological constant) is conserved. The relevant symmetry or mechanism need not be applicable today. Any additional cosmological constant term induced by a phase transition in the energy-momentum tensor in this case is compensated by a shift in the cosmological constant term of gravitational origin.
Keywords
Cosmological constant, general relativity, cosmology
First Page
175
Last Page
179
Recommended Citation
ERDEM, RECAİ
(2016)
"It is sufficient to set the cosmological constant to zero or to a small number at an initial time,"
Turkish Journal of Physics: Vol. 40:
No.
2, Article 8.
https://doi.org/10.3906/fiz-1506-25
Available at:
https://journals.tubitak.gov.tr/physics/vol40/iss2/8
