scholarly journals Canonical interacting quantum fields on two-dimensional de Sitter space

2017 ◽  
Vol 772 ◽  
pp. 786-790 ◽  
Author(s):  
Christian D. Jäkel ◽  
Jens Mund
Keyword(s):  
De Sitter Space ◽  
Two Dimensional ◽  
Quantum Fields ◽  
De Sitter

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 Two dimensional anti-de Sitter space and discrete light cone quantization

1999 ◽  
Vol 468 (1-2) ◽  
pp. 52-57 ◽  
Author(s):  
Jin-Ho Cho ◽  
Taejin Lee ◽  
Gordon Semenoff
Keyword(s):  
Light Cone ◽  
De Sitter Space ◽  
Two Dimensional ◽  
De Sitter ◽  
Light Cone Quantization

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 Formation of Conserved Charge at the de Sitter Space

Particles ◽  
2020 ◽  
Vol 3 (2) ◽  
pp. 355-363
Author(s):  
Valery V. Nikulin ◽  
Polina M. Petriakova ◽  
Sergey G. Rubin
Keyword(s):  
Early Universe ◽  
Extra Dimensions ◽  
De Sitter Space ◽  
Lepton Number ◽  
Relaxation Processes ◽  
Two Dimensional ◽  
Charge Accumulation ◽  
De Sitter ◽  
Extra Space

The article considers a new mechanism of charge accumulation in the early Universe in theories with compact extra dimensions. The relaxation processes in the extra space metric that take place during its formation lead to the establishment of symmetrical extra space configuration. As a result, the initial accumulation of the number associated with the symmetry occurs. We demonstrate this mechanism using a simple example of a two-dimensional apple-like extra space metric with U ( 1 ) -symmetry. The conceptual idea of the mechanism can be used to develop a model for the production of the baryon or lepton number in the early Universe.

Dynamical breakdown of supersymmetry in two-dimensional anti-de Sitter space

1986 ◽  
Vol 273 (2) ◽  
pp. 487-500 ◽  
Author(s):  
Takeo Inami ◽  
Hirosi Ooguri
Keyword(s):  
De Sitter Space ◽  
Two Dimensional ◽  
De Sitter

HOW HOT IS THE DE SITTER SPACE?

1996 ◽  
Vol 10 (13n14) ◽  
pp. 1507-1520 ◽  
Author(s):  
H. NARNHOFER ◽  
I. PETER ◽  
W. THIRRING
Keyword(s):  
Vector Field ◽  
Killing Vector ◽  
De Sitter Space ◽  
Killing Vector Field ◽  
Quantum Fields ◽  
De Sitter

We show that the unique invariant locally Minkowskian state of quantum fields in de Sitter space M has for an observer moving along with a Killing vector field a temperature [Formula: see text] where R is the radius of M and a his acceleration. States with another temperature cannot be locally Minkowskian all over M.

scholarly journals SPONTANEOUS DECAY OF THE EFFECTIVE COSMOLOGICAL CONSTANT

1998 ◽  
Vol 13 (07) ◽  
pp. 571-580 ◽  
Author(s):  
MURAT ÖZER ◽  
M. O. TAHA
Keyword(s):  
Cosmological Constant ◽  
De Sitter Space ◽  
Space Time ◽  
Time Dependent ◽  
Spontaneous Decay ◽  
Quantum Fields ◽  
De Sitter ◽  
Initial Value ◽  
Effective Time ◽  
Effective Cosmological Constant

We discuss the notion that quantum fields may induce an effective time-dependent cosmological constant which decays from a large initial value. It is shown that such cosmological models are viable in a non-de Sitter space–time.

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