scholarly journals Vacuum quantum stress tensor fluctuations: A diagonalization approach

2018 ◽  
Vol 97 (2) ◽  
Author(s):  
Enrico D. Schiappacasse ◽  
Christopher J. Fewster ◽  
L. H. Ford
Keyword(s):  
Stress Tensor ◽  
Quantum Stress Tensor

Quantum Stress Tensor in Schwarzschild Space-Time

1984 ◽  
Vol 53 (5) ◽  
pp. 403-406 ◽  
Author(s):  
K. W. Howard ◽  
P. Candelas
Keyword(s):  
Stress Tensor ◽  
Space Time ◽  
Quantum Stress Tensor

scholarly journals Quantum stress tensor fluctuation effects in inflationary cosmology

2011 ◽  
Vol 330 ◽  
pp. 012006 ◽  
Author(s):  
Jen-Tsung Hsiang ◽  
Chun-Hsien Wu ◽  
L H Ford ◽  
Kin-Wang Ng
Keyword(s):  
Stress Tensor ◽  
Inflationary Cosmology ◽  
Fluctuation Effects ◽  
Quantum Stress Tensor

scholarly journals Particle creation from the quantum stress tensor

2015 ◽  
Vol 91 (10) ◽  
Author(s):  
Javad T. Firouzjaee ◽  
George F. R. Ellis
Keyword(s):  
Stress Tensor ◽  
Particle Creation ◽  
Quantum Stress Tensor

STOCHASTIC GRAVITY AND THE LANGEVIN-RAYCHAUDHURI EQUATION

2005 ◽  
Vol 20 (11) ◽  
pp. 2364-2373 ◽  
Author(s):  
J. BORGMAN ◽  
L. H. FORD
Keyword(s):  
Stress Tensor ◽  
Langevin Equation ◽  
Raychaudhuri Equation ◽  
Operational Approach ◽  
Gravitational Effects ◽  
Quantum Stress Tensor ◽  
Physical Manifestation ◽  
Stochastic Gravity

We treat the gravitational effects of quantum stress tensor fluctuations. An operational approach is adopted in which these fluctuations produce fluctuations in the focusing of a bundle of geodesics. This can be calculated explicitly using the Raychaudhuri equation as a Langevin equation. The physical manifestation of these fluctuations are angular blurring and luminosity fluctuations of the images of distant sources.

scholarly journals Completely regular quantum stress tensor withw<−1

2010 ◽  
Vol 81 (2) ◽  
Author(s):  
E. O. Kahya ◽  
V. K. Onemli ◽  
R. P. Woodard
Keyword(s):  
Stress Tensor ◽  
Completely Regular ◽  
Quantum Stress Tensor

scholarly journals Quantum fluctuation of stress tensor in a higher-derivative scalar field theory around a cosmic string

2021 ◽  
pp. 2150150
Author(s):  
Nahomi Kan ◽  
Masashi Kuniyasu ◽  
Kiyoshi Shiraishi
Keyword(s):  
Scalar Field ◽  
Stress Tensor ◽  
Cosmic String ◽  
Vacuum Expectation ◽  
Vacuum Expectation Value ◽  
Scalar Fields ◽  
Vacuum Fluctuation ◽  
Higher Derivative ◽  
Scalar Theories ◽  
Quantum Stress Tensor

In this paper, we calculate the vacuum fluctuation of the stress tensor of a higher-derivative theory around a thin cosmic string. To this end, we adopt the method to obtain the stress tensor from the effective action developed by Gibbons et al. By their method, the quantum stress tensor of higher-derivative scalar theories without self-interaction is expressed as a simple sum of quantum stress tensors of free massive scalar fields. Unlike the vacuum expectation value of the scalar field squared obtained in the similar model, there appears no reduction of the values near the conical singularity.

scholarly journals STRESS-TENSOR COMMUTATORS AND SCHWINGER TERMS IN SINGLETON THEORIES

1990 ◽  
Vol 05 (18) ◽  
pp. 3599-3615 ◽  
Author(s):  
E. BERGSHOEFF ◽  
E. SEZGIN ◽  
Y. TANII
Keyword(s):  
Stress Tensor ◽  
De Sitter ◽  
Simple Derivation ◽  
Central Extensions ◽  
Commutator Algebra ◽  
Superconformal Field Theories ◽  
Finite Dimensional ◽  
Field Independent ◽  
Field Dependent ◽  
Quantum Stress Tensor

We compute the commutators of the regularized quantum stress-tensor of singleton theories formulated on the boundary of a (p+2)-dimensional anti de Sitter space (AdSp+2). (These are superconformal field theories on Sp×S1.) We find that the commutator algebra contains the finite dimensional AdSp+2 algebra SO (p+1, 2). We also find field dependent as well as field independent Schwinger terms (i.e. central extensions), which, however, do not lead to anomalies in the algebra of the AdS charges. We also give a simple derivation of the two-point functions for bosonic and fermionic singletons.

scholarly journals Quantum Stress Tensor Fluctuations and their Physical Effects

2008 ◽  
Author(s):  
L. H. Ford ◽  
Chun-Hsien Wu ◽  
Alfredo Macias ◽  
Claus Lämmerzahl ◽  
Abel Camacho
Keyword(s):  
Stress Tensor ◽  
Physical Effects ◽  
Quantum Stress Tensor
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