Gravity and induced matter on nearly Kahler manifolds

被引:1
|
作者
Naderi, F. [1 ]
Rezaei-Aghdam, A. [1 ]
Darabi, F. [1 ]
机构
[1] Azarbaijan Shahid Madani Univ, Fac Sci, Dept Phys, Tabriz 53714161, Iran
来源
关键词
Gravitational model; cosmology; nearly Kahler structure; DARK ENERGY; COSMOLOGICAL CONSEQUENCES; PHANTOM; CONSTRAINTS; STRINGS; LAMBDA; FIELDS; MODEL;
D O I
10.1142/S0217751X15500153
中图分类号
O57 [原子核物理学、高能物理学];
学科分类号
070202 ;
摘要
We show that the conservation of energy-momentum tensor of a gravitational model with Einstein-Hilbert like action on a nearly Kahler manifold with the scalar curvature of a curvature-like tensor, is consistent with the nearly Kahler properties. In this way, the nearly Kahler structure is automatically manifested in the action as a induced matter field. As an example of nearly Kahler manifold, we consider the group manifold of R x II x S-3 x S-3 on which we identify a nearly Kahler structure and solve the Einstein equations to interpret the model. It is shown that the nearly Kahler structure in this example is capable of alleviating the well known fine tuning problem of the cosmological constant. Moreover, this structure may be considered as a potential candidate for dark energy.
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页数:20
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