Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/5950
Title: It is sufficient to set the cosmological constant to zero or to a small number at an initial time
Authors: Erdem, Recai
Erdem, Recai
Izmir Institute of Technology. Physics
Keywords: Cosmological constant
Cosmology
General relativity
Initial time
Issue Date: 2016
Publisher: TUBITAK
Source: Erdem, R. (2016). It is sufficient to set the cosmological constant to zero or to a small number at an initial time. Turkish Journal of Physics, 40(2), 175-179. 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.
URI: http://doi.org/10.3906/fiz-1506-25
http://hdl.handle.net/11147/5950
ISSN: 1300-0101
1303-6122
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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