Scalar field propagators in anti‐de Sitter space‐time

1985 ◽  
Vol 26 (8) ◽  
pp. 2050-2058 ◽  
Author(s):  
C. Dullemond ◽  
E. van Beveren
Keyword(s):  
Scalar Field ◽  
De Sitter Space ◽  
Space Time ◽  
De Sitter

Noncommutative scalar field in de Sitter space–time and pair creation process

2021 ◽  
Vol 36 (02) ◽  
pp. 2150011
Author(s):  
Nabil Mehdaoui ◽  
Lamine Khodja ◽  
Salah Haouat
Keyword(s):  
Scalar Field ◽  
Chemical Potential ◽  
De Sitter Space ◽  
Space Time ◽  
Pair Creation ◽  
De Sitter ◽  
Creation Process ◽  
Scalar Particles ◽  
Constant Electromagnetic Field

In this work, we address the process of pair creation of scalar particles in [Formula: see text] de Sitter space–time in presence of a constant electromagnetic field by applying the noncommutativity on the scalar field up to first-order in [Formula: see text]. We calculate the density of particles created in the vacuum by the mean of the Bogoliubov transformations. In contrast to a previous result, we show that noncommutativity contributes to the pair creation process. We find that the noncommutativity plays the same role of chemical potential and gives an important interest for studies at high energies.

scholarly journals QUANTUM FLUCTUATIONS FOR A SCALAR FIELD IN THE SPACE–TIME OF GRAVITATIONAL IMPLUSIVE WAVE

1998 ◽  
Vol 13 (08) ◽  
pp. 1201-1211 ◽  
Author(s):  
Y. ENGINER ◽  
M. HORTAÇSU ◽  
N. ÖZDEMIR
Keyword(s):  
Scalar Field ◽  
Gravitational Waves ◽  
Quantum Fluctuations ◽  
De Sitter Space ◽  
Space Time ◽  
Massless Scalar ◽  
Massless Scalar Field ◽  
De Sitter

Quantum fluctuations for a massless scalar field in the background metric of spherical implusive gravitational waves propagating through Minkowski and de Sitter spaces are investigated. It is shown that there exist finite fluctuations for de Sitter space.

scholarly journals The global rotating scalar field vacuum on anti-de Sitter space–time

2015 ◽  
Vol 740 ◽  
pp. 188-191 ◽  
Author(s):  
Carl Kent ◽  
Elizabeth Winstanley
Keyword(s):  
Scalar Field ◽  
De Sitter Space ◽  
Space Time ◽  
De Sitter

scholarly journals Scalar field instability in de Sitter space–time

2006 ◽  
Vol 734 (1-2) ◽  
pp. 208-219 ◽  
Author(s):  
Alexander Dolgov ◽  
Diego N. Pelliccia
Keyword(s):  
Scalar Field ◽  
De Sitter Space ◽  
Space Time ◽  
De Sitter

scholarly journals LORENTZIAN WORMHOLES IN THE FRIEDMAN–ROBERTSON–WALKER UNIVERSE

2006 ◽  
Vol 15 (08) ◽  
pp. 1217-1223 ◽  
Author(s):  
B. MIRZA ◽  
M. ESHAGHI ◽  
S. DEHDASHTI
Keyword(s):  
Wave Equation ◽  
Scalar Field ◽  
De Sitter Space ◽  
Phantom Energy ◽  
Space Time ◽  
De Sitter ◽  
Frw Universe ◽  
One Dimensional ◽  
Dimensional Wave

The metric of some Lorentzian wormholes in the background of the Friedman–Robertson–Walker (FRW) universe is obtained. It is shown that for a de Sitter space–time, the new solution is supported by phantom energy. The wave equation for a scalar field in such backgrounds is separable. The form of the potential for the Schrödinger type one-dimensional wave equation is found.

Vacuum densities for a charged scalar field in de Sitter space-time with compact dimensions

2016 ◽  
Vol 22 (2) ◽  
pp. 187-192 ◽  
Author(s):  
E. V. Chubaryan ◽  
A. S. Kotanjyan ◽  
A. A. Saharian ◽  
D. H. Simonyan
Keyword(s):  
Scalar Field ◽  
De Sitter Space ◽  
Space Time ◽  
De Sitter ◽  
Charged Scalar ◽  
Charged Scalar Field
Sign in / Sign up

Export Citation Format

Share Document