Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/2103
Title: A symmetry for the vanishing cosmological constant
Authors: Erdem, Recai
Keywords: Symmetry principle
Cosmological constant
Symmetry (Physics)
Space-time
Issue Date: Jun-2007
Publisher: IOP Publishing Ltd.
Source: Erdem, R. (2007). A symmetry for the vanishing cosmological constant. Journal of Physics A: Mathematical and Theoretical, 40(25), 6945-6950. doi:10.1088/1751-8113/40/25/S44
Abstract: Two different realizations of a symmetry principle that impose a zero cosmological constant in an extra-dimensional set-up are studied. The symmetry is identified by multiplication of the metric by minus one. In the fist realization of the symmetry this is provided by a symmetry transformation that multiplies the coordinates by the imaginary number i. In the second realization this is accomplished by a symmetry transformation that multiplies the metric tensor by minus one. In both realizations of the symmetry the requirement of the invariance of the gravitational action under the symmetry selects out the dimensions given by D ≤ 2(2n + 1), n ≤ 0, 1, 2..., and forbids a bulk cosmological constant. Another attractive aspect of the symmetry is that it seems to be more promising for quantization when compared to the usual scale symmetry. The second realization of the symmetry principle is more attractive in that it is possible to make a possible brane cosmological constant zero in a simple way by using the same symmetry, and the symmetry may be identified by reflection symmetry in extra dimensions.
URI: http://doi.org/10.1088/1751-8113/40/25/S44
http://hdl.handle.net/11147/2103
ISSN: 1751-8113
1751-8113
1751-8121
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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