Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Ahmedov, Haji"'
Autor:
Ahmedov, Haji, Birlikseven, Cengiz
We study coherence effects in an atom having three metastable levels and single life-time broadened upper state. Two laser fields couple ground states to an excited one and an radio-frequency (rf) field operates between ground state levels. We consid
Externí odkaz:
http://arxiv.org/abs/1302.1976
Autor:
Ahmedov, Haji, Aliev, Alikram N.
We study algebraic type N spacetimes in the extended new massive gravity (NMG), considering both the Born-Infeld model (BI-NMG) and the model of NMG with any finite order curvature corrections. We show that for these spacetimes, the field equations o
Externí odkaz:
http://arxiv.org/abs/1201.5724
Autor:
Ahmedov, Haji, Aliev, Alikram N.
Publikováno v:
Phys.Rev.D83:084032,2011
In a recent reformulation of three-dimensional new massive gravity (NMG), the field equations of the theory consist of a massive (tensorial) Klein-Gordon type equation with a curvature-squared source term and a constraint equation. Using this framewo
Externí odkaz:
http://arxiv.org/abs/1103.1086
Autor:
Ahmedov, Haji, Aliev, Alikram N.
Publikováno v:
Phys.Lett.B694:143-148,2010
We find the most general algebraic type N solution with non-vanishing scalar curvature, which comprises all type N solutions of new massive gravity in three dimensions. We also give the special forms of this solution, which correspond to certain crit
Externí odkaz:
http://arxiv.org/abs/1008.0303
Autor:
Ahmedov, Haji, Aliev, Alikram N.
Publikováno v:
Phys.Rev.Lett.106:021301,2011
We give a novel description of the recently proposed theory of new massive gravity (NMG) in three dimensions. We show that in terms of a Dirac type differential operator acting on the traceless Ricci tensor, the field equations of the theory reduce t
Externí odkaz:
http://arxiv.org/abs/1006.4264
Autor:
Ahmedov, Haji, Aliev, Alikram N.
Publikováno v:
Phys.Rev.D82:024043,2010
Chern-Simons (CS) modified gravity with a prescribed CS scalar field does not admit rotating black hole solutions with spherical topology of the horizon. In this paper, we show that it does admit rotating {\it black hole/string} solutions with cylind
Externí odkaz:
http://arxiv.org/abs/1003.6017
Autor:
Ahmedov, Haji, Aliev, Alikram N.
Publikováno v:
Phys.Lett.B690:196-200,2010
We show that for four-dimensional spacetimes with a non-null hypersurface orthogonal Killing vector and for a Chern-Simons (CS) background (non-dynamical) scalar field, which is constant along the Killing vector, the source-free equations of CS modif
Externí odkaz:
http://arxiv.org/abs/1003.3148
Autor:
Ahmedov, Haji, Aliev, Alikram N.
Publikováno v:
Phys.Lett.B679:396-400,2009
We study a five-dimensional spacetime admitting, in the presence of torsion, a non-degenerate conformal Killing-Yano 2-form which is closed with respect to both the usual exterior differentiation and the exterior differentiation with torsion. Further
Externí odkaz:
http://arxiv.org/abs/0907.1804
Autor:
Ahmedov, Haji, Aliev, Alikram N.
Publikováno v:
Phys.Rev.D79:084019,2009
General higher-dimensional rotating black hole spacetimes of any dimensions admit the Killing and Killing-Yano tensors, which generate the hidden symmetries just as in four-dimensional Kerr spacetime. We study these properties of the black holes usin
Externí odkaz:
http://arxiv.org/abs/0902.2498
Autor:
Ahmedov, Haji, Aliev, Alikram N.
Publikováno v:
Phys.Lett.B675:257-261,2009
We explore the symmetries of classical stationary spacetimes in terms of the dynamics of a spinning string described by a worldsheet supersymmetric action. We show that for stationary configurations of the string, the action reduces to that for a pse
Externí odkaz:
http://arxiv.org/abs/0902.0258