Built on

A. Maleknejad, M.M. Sheikh-Jabbari, “Gauge-flation: Inflation from Non-Abelian Gauge Fields,” [arXiv:1102.1513 [hep-ph]]; “Non-Abelian gauge field inflation” Phys. Rev. D 84 (2011) 043515 [arXiv:1102.1932 [hep-ph]]
Original
1932
Earlier work this paper cites.
G. W. Gibbons and S. W. Hawking, “Cosmological Event Horizons, Thermodynamics, and Particle Creation,” Phys. Rev. D 15
1977
Earlier work this paper cites.
R. M. Wald, “ Asymptotic behavior of homogeneous cosmological models in the presence of a positive cosmological constant”, Phys. Rev. D28, 2118 (1982)
1982
Earlier work this paper cites.
S. W. Hawking and I. G. Moss, “Supercooled Phase Transitions in the Very Early Universe,” Phys. Lett. B 110
1982
Earlier work this paper cites.
I. Moss and V. Sahni, “Anisotropy In The Chaotic Inflationary Universe,” Phys. Lett. B 178 (1986) 159. J. D. Barrow and O. Gron, “Homogenization And Isotropization Of An Inflationary Cosmological Model,” Phys. Lett. B 182
1992
Earlier work this paper cites.
H. Stephani, D. Kramer, M. A. H. MacCallum, C. Hoenselaers and E. Herlt, “Exact solutions of Einstein’s field equations,” Cambridge, UK: Univ. Pr. (2003) 701 P
2003
Earlier work this paper cites.

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L. H. Ford, “Inflation Driven By A Vector Field,” Phys. Rev. D 40
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Then

B. Himmetoglu, “Spectrum of Perturbations in Anisotropic Inflationary Universe with Vector Hair,” JCAP 1003
Original
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Later among the works it cites.
S. Hervik, D. F. Mota and M. Thorsrud, “Inflation with stable anisotropic hair: Is it cosmologically viable?,” JHEP 1111
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Later among the works it cites.
S. Kanno, M. Kimura, J. Soda and S. Yokoyama, “Anisotropic Inflation from Vector Impurity,” JCAP 0808
Original
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Later among the works it cites.
R. Emami, H. Firouzjahi, S. M. Sadegh Movahed and M. Zarei, “Anisotropic Inflation from Charged Scalar Fields,” JCAP 1102
Original
2011
Later among the works it cites.
A. Maleknejad, M. M. Sheikh-Jabbari and J. Soda, “Gauge-flation and Cosmic No-Hair Conjecture,” JCAP 1201

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2012

Revisiting Cosmic No-Hair Theorem for Inflationary Settings

Maleknejad, A., Sheikh-Jabbari, M. M.

Understand

In this work we revisit Wald's cosmic no-hair theorem in the context of accelerating Bianchi cosmologies for a generic cosmic fluid with non-vanishing anisotropic stress tensor and when the fluid energy momentum tensor is of the form of a cosmological constant term plus a piece which does not respect strong or dominant energy conditions.

Such a fluid is the one appearing in inflationary models.
We show that for such a system anisotropy may grow, in contrast to the cosmic no-hair conjecture.
In particular, for a generic inflationary model we show that there is an upper bound on the growth of anisotropy.

Built on

A. Maleknejad, M.M. Sheikh-Jabbari, “Gauge-flation: Inflation from Non-Abelian Gauge Fields,” [arXiv:1102.1513 [hep-ph]]; “Non-Abelian gauge field inflation” Phys. Rev. D 84 (2011) 043515 [arXiv:1102.1932 [hep-ph]]
Original
1932
Earlier work this paper cites.
G. W. Gibbons and S. W. Hawking, “Cosmological Event Horizons, Thermodynamics, and Particle Creation,” Phys. Rev. D 15
1977
Earlier work this paper cites.
R. M. Wald, “ Asymptotic behavior of homogeneous cosmological models in the presence of a positive cosmological constant”, Phys. Rev. D28, 2118 (1982)
1982
Earlier work this paper cites.
S. W. Hawking and I. G. Moss, “Supercooled Phase Transitions in the Very Early Universe,” Phys. Lett. B 110
1982
Earlier work this paper cites.
I. Moss and V. Sahni, “Anisotropy In The Chaotic Inflationary Universe,” Phys. Lett. B 178 (1986) 159. J. D. Barrow and O. Gron, “Homogenization And Isotropization Of An Inflationary Cosmological Model,” Phys. Lett. B 182
1992
Earlier work this paper cites.
H. Stephani, D. Kramer, M. A. H. MacCallum, C. Hoenselaers and E. Herlt, “Exact solutions of Einstein’s field equations,” Cambridge, UK: Univ. Pr. (2003) 701 P
2003
Earlier work this paper cites.

Similar

E. Silverstein and D. Tong, “Scalar speed limits and cosmology: Acceleration from D-cceleration,” Phys. Rev. D 70
2004
Cited alongside, same era.
V. Mukhanov, “Physical Foundations of Cosmology,” Cambrdige Uni. Press (2005); D. Lyth and A. Liddle, “Primordial Density Perturbations,” Cambridge Uni. Press (2009). S. Weinberg, “Cosmology,” Oxford, UK: Oxford Univ. Pr. (2008);
2008
Cited alongside, same era.
L. H. Ford, “Inflation Driven By A Vector Field,” Phys. Rev. D 40
Original
2009
Cited alongside, same era.
M. Watanabe, S. Kanno and J. Soda, “Inflationary Universe with Anisotropic Hair,” Phys. Rev. Lett. 102
Original
2009
Cited alongside, same era.
A. Hajian and T. Souradeep, “Measuring statistical isotropy of the CMB anisotropy,” Astrophys. J. 597