11 citations · 74 across the 10 of their papers we have counts for
10 papers
Anti-de Sitterian "massive" elementary systems and their Minkowskian and Newton-Hooke contraction limits
Mohammad Enayati, Jean-Pierre Gazeau, Mariano A. del Olmo +1
We elaborate the definition and properties of "massive" elementary systems in the -dimensional Anti-de Sitter (AdS) spacetime, on both classical and quantum levels. We f…
The de Sitter group and its representations: a window on the notion of de Sitterian elementary systems
Mohammad Enayati, Jean-Pierre Gazeau, Hamed Pejhan +1
We review the construction of ("free") elementary systems in de Sitter (dS) spacetime, in the Wigner sense, as associated with unitary irreducible representations (UIR's) of the dS…
"Massive" Rarita-Schwinger field in de Sitter space
Hamed Pejhan, Mohammad Enayati, Jean-Pierre Gazeau +1
We present a covariant quantization of the "massive" spin- Rarita-Schwinger field in de Sitter (dS) spacetime. The dS group representation theory and its Wigner inte…
Gupta-Bleuler quantization for linearized gravity in de Sitter spacetime
Hamed Pejhan, Mohammad Enayati, Jean-Pierre Gazeau +1
In a recent Letter, we have pointed out that the linearized Einstein gravity in de Sitter (dS) spacetime besides the spacetime symmetries generated by the Killing vectors and the e…
`Hidden' symmetry of linearized gravity in de Sitter space
Hamed Pejhan, Surena Rahbardehghan, Mohammad Enayati +2
We demonstrate that the linearized Einstein gravity in de Sitter (dS) spacetime besides the evident symmetries also possesses the additional (local) symmetry $h_{μν}\rightarrow h_{…
A small non-vanishing cosmological constant from the Krein-Gupta-Bleuler vacuum
Hamed Pejhan, Kazuharu Bamba, Mohammad Enayati +1
We point out a potential relevance between the Krein-Gupta-Bleuler (KGB) vacuum leading to a fully covariant quantum field theory for gravity in de Sitter (dS) spacetime and the ob…
"Massless" spin-2 field in de Sitter space
Hamed Pejhan, Kazuharu Bamba, Surena Rahbardehghan +1
In this paper, admitting a de Sitter (dS)-invariant vacuum in an indefinite inner product space, we present a Gupta-Bleuler type setting for causal and full dS-covariant quantizati…
Super-gauge Field in de Sitter Universe
S. Parsamehr, M. Enayati, M. V. Takook
The Gupta-Bleuler triplet for vector-spinor gauge field is presented in de Sitter ambient space formalism. The invariant space of field equation solutions is obtained with respect…
Quantum Linear Gravity in de Sitter Universe On Gupta-Bleuler vacuum state
M. Enayati, S. Rouhani, M. V. Takook
Application of Krein space quantization to the linear gravity in de Sitter space-time have constructed on Gupta-Bleuler vacuum state, resulting in removal of infrared divergence an…
Cosmological observations in non-local cosmology
H. Farajollahi, F. Tayebi, F. Milani +1
In this article in a generalization of our previous work, we investigate the dynamics of the non-local gravity after casting it into local form. The non-singular bouncing be…