Zobrazeno 1 - 10
of 38
pro vyhledávání: '"Tanhayi, M. R."'
Publikováno v:
Communications in Theoretical Physics, Vol. 65, No. 3, pp. 308--314, 2016
We use the excited coherent states built over the initial non-de Sitter modes, to study the modification of spectra of primordial scalar fluctuation. Non-de Sitter modes are actually the asymptotic solution of the inflaton field equation[JHEP 09(2014
Externí odkaz:
http://arxiv.org/abs/1410.0114
Publikováno v:
Advances in High Energy Physics 2015, 902396, 7
Metric-affine geometry provides a non-trivial extension of the general relativity where the metric and connection are treated as the two independent fundamental quantities in constructing the space-time (with non-vanishing torsion and non-metricity).
Externí odkaz:
http://arxiv.org/abs/1310.1452
We use the auxiliary fields and (excited-) de Sitter solutions to study the standard power spectrum of primordial fluctuations of a scalar field in the early universe. The auxiliary fields are the negative norm solutions of the field equation and as
Externí odkaz:
http://arxiv.org/abs/1306.6722
In this work, we first obtain the linear form of the scalar self-force and then, the effect of self-force on the particle's trajectory is considered. In de Sitter space-time, within the classical approach, we consider this effect. Finally, some limit
Externí odkaz:
http://arxiv.org/abs/1204.5060
Publikováno v:
Int.J.Theor.Phys.49:2263-2277,2010
For the tensor field of rank-2 there are two unitary irreducible representation (UIR) in de Sitter (dS) space denoted by $\Pi^{\pm}_{2,2}$ and $\Pi^{\pm}_{2,1}$ [1]. In the flat limit only the $\Pi^{\pm}_{2,2}$ coincides to the UIR of Poincar\'e grou
Externí odkaz:
http://arxiv.org/abs/1101.4311
Publikováno v:
J.Math.Phys.51:032503,2010
It has been shown that the theory of linear conformal quantum gravity must include a tensor field of rank-3 and mixed symmetry [1]. In this paper, we obtain the corresponding field equation in de Sitter space. Then, in order to relate this field with
Externí odkaz:
http://arxiv.org/abs/0903.5249
Autor:
Takook, M. V., Tanhayi, M. R.
Publikováno v:
JHEP 1012:044,2010
In this paper we obtain the linear Weyl gravity in de Sitter background. Its linear form in five-dimensional ambient space notation has also been obtained. From the group theoretical point of view, we show that this conformal invariant fourth order t
Externí odkaz:
http://arxiv.org/abs/0903.2670
Publikováno v:
Phys.Rev.D77:064028,2008
''Massless'' spin-2 field equation in de Sitter space, which is invariant under the conformal transformation, has been obtained. The frame work utilized is the symmetric rank-2 tensor field of the conformal group. Our method is based on the group the
Externí odkaz:
http://arxiv.org/abs/0805.2227
Autor:
Vazirian, R.1 r.vazirian@srbiau.ac.ir, Tanhayi, M. R.2 m-tanhayi@iauctb.ac.ir, Motahar, Z. A.3 motahar@gmail.com
Publikováno v:
Advances in High Energy Physics. 1/20/2015, Vol. 2015, p1-7. 7p.
Publikováno v:
International Journal of Theoretical Physics. Sep2010, Vol. 49 Issue 9, p2263-2277. 15p.