scholarly journals Quantum Fields on the de Sitter Expanding Universe

10.5772/36375 ◽  
2012 ◽  
Author(s):  
Ion I.
Keyword(s):  
Quantum Fields ◽  
Expanding Universe ◽  
De Sitter

scholarly journals Interacting quantum fields in various charts of anti–de Sitter spacetime

2021 ◽  
Vol 103 (4) ◽  
Author(s):  
E. T. Akhmedov ◽  
A. A. Artemev ◽  
I. V. Kochergin
Keyword(s):  
De Sitter Spacetime ◽  
Quantum Fields ◽  
De Sitter ◽  
Sitter Spacetime

Classical and quantum fields in de Sitter space

1969 ◽  
Vol 64 (3) ◽  
pp. 669-714 ◽  
Author(s):  
G. Börner ◽  
H. P. Dürr
Keyword(s):  
De Sitter Space ◽  
Quantum Fields ◽  
De Sitter

scholarly journals Quantum fields in an expanding universe

1999 ◽  
Vol 16 (12) ◽  
pp. 3923-3935 ◽  
Author(s):  
F Finelli ◽  
A Gruppuso ◽  
G Venturi
Keyword(s):  
Quantum Fields ◽  
Expanding Universe

scholarly journals LECTURE NOTES ON INTERACTING QUANTUM FIELDS IN DE SITTER SPACE

2014 ◽  
Vol 23 (01) ◽  
pp. 1430001 ◽  
Author(s):  
E. T. AKHMEDOV
Keyword(s):  
De Sitter Space ◽  
The Self ◽  
Field Theories ◽  
Tree Level ◽  
Main Concern ◽  
Quantum Field Theories ◽  
Quantum Field ◽  
Quantum Fields ◽  
De Sitter ◽  
Invariant States

We discuss peculiarities of quantum fields in de Sitter (dS) space on the example of the self-interacting massive real scalar, minimally coupled to the gravity background. Nonconformal quantum field theories (QFTs) in dS space show very special infrared behavior, which is not shared by quantum fields neither in flat nor in anti-dS space: in dS space loops are not suppressed in comparison with tree level contributions because there are strong infrared corrections. That is true even for massive fields. Our main concern is the interrelation between these infrared effects, the invariance of the QFT under the dS isometry and the (in)stability of dS invariant states (and of dS space itself) under nonsymmetric perturbations.

scholarly journals Light from Reissner–Nordstrom–de Sitter black holes

2021 ◽  
pp. 2150162
Author(s):  
Ion I. Cotăescu
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Expanding Universe ◽  
De Sitter ◽  
Principal Parameter ◽  
Null Geodesics ◽  
Charged Black Holes ◽  
Peculiar Velocities ◽  
First Time

We derive for the first time the form of the spiral null geodesics around the photon sphere of the Reissner–Nordstrom black hole in the de Sitter expanding universe. Moreover, we obtain the principal parameter we need for deriving, according to our method [I. I. Cotăescu, Eur. Phys. J. C 81, 32 (2021)], the black hole shadow and the related redshift as measured by a remote observer situated in the asymptotic zone. We obtain thus a criterion of detecting charged black holes without peculiar velocities when one knows the mass, redshift and the black hole shadow.

Quantum fields in expanding universe

2013 ◽  
pp. 64-84
Author(s):  
Viatcheslav Mukhanov ◽  
Sergei Winitzki
Keyword(s):  
Quantum Fields ◽  
Expanding Universe
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