Stress-energy Tensor of the Quantized Massive Fields in Spatially-flat $D$-dimensional Friedmann--Robertson--Walker Spacetimes

2016 ◽  
Vol 47 (8) ◽  
pp. 2095 ◽  
Author(s):  
J. Matyjasek ◽  
D. Tryniecki
Keyword(s):  
Energy Tensor ◽  
Stress Energy Tensor ◽  
Stress Energy ◽  
Friedmann Robertson Walker ◽  
Massive Fields

scholarly journals Massive scalar field theory in the presence of moving mirrors

2018 ◽  
Vol 33 (21) ◽  
pp. 1850126 ◽  
Author(s):  
L. Astrakhantsev ◽  
O. Diatlyk
Keyword(s):  
Canonical Form ◽  
Constant Velocity ◽  
Field Operator ◽  
Energy Tensor ◽  
Stress Energy Tensor ◽  
Expectation Value ◽  
Commutation Relations ◽  
Conjugate Momentum ◽  
Stress Energy ◽  
Massive Fields

We study the 2D massive fields in the presence of moving mirrors. We do that for standing mirror and mirror moving with constant velocity. We calculate the modes and commutation relations of the field operator with the corresponding conjugate momentum in each case. We find that in case of the ideal mirror, which reflects modes with all momenta equally well, the commutation relations do not have their canonical form. However, in the case of nonideal mirror, which is transparent for the modes with high enough momenta, the commutation relations of the field operator and its conjugate momentum have their canonical form. Then, we calculate the free Hamiltonian and the expectation value of the stress-energy tensor in all the listed situations. In the presence of moving mirrors the diagonal form in terms of the creation and annihilation operators has the operator that performs translations along the mirror’s worldline rather than the one which does translations along the time-line. For the massive fields in the presence of a mirror moving with constant velocity the expectation value of the stress-energy tensor has a nondiagonal contribution which decays with the distance from the mirror.

scholarly journals Stress-energy tensor of the quantized massive fields in Friedman-Robertson-Walker spacetimes

2013 ◽  
Vol 88 (10) ◽  
Author(s):  
Jerzy Matyjasek ◽  
Paweł Sadurski
Keyword(s):  
Energy Tensor ◽  
Stress Energy Tensor ◽  
Stress Energy ◽  
Massive Fields

scholarly journals Stress-energy tensor of quantized massive fields in static wormhole spacetimes

2017 ◽  
Vol 96 (10) ◽  
Author(s):  
Ewa Kocuper ◽  
Jerzy Matyjasek ◽  
Kasia Zwierzchowska
Keyword(s):  
Energy Tensor ◽  
Stress Energy Tensor ◽  
Stress Energy ◽  
Massive Fields

scholarly journals Cosmological perfect fluids in Gauss–Bonnet gravity

2019 ◽  
Vol 16 (09) ◽  
pp. 1950133 ◽  
Author(s):  
Salvatore Capozziello ◽  
Carlo Alberto Mantica ◽  
Luca Guido Molinari
Keyword(s):  
Perfect Fluid ◽  
Topological Invariant ◽  
Energy Tensor ◽  
Curvature Scalar ◽  
Stress Energy Tensor ◽  
Perfect Fluids ◽  
Stress Energy ◽  
Walker Metric ◽  
Friedmann Robertson Walker ◽  
Hubble Flow

In a [Formula: see text]-dimensional Friedmann–Robertson–Walker metric, it is rigorously shown that any analytical theory of gravity [Formula: see text], where [Formula: see text] is the curvature scalar and [Formula: see text] is the Gauss–Bonnet topological invariant, can be associated to a perfect-fluid stress–energy tensor. In this perspective, dark components of the cosmological Hubble flow can be geometrically interpreted.

scholarly journals Stress-energy tensor correlators from the world-sheet

2021 ◽  
Vol 2021 (3) ◽  
Author(s):  
Hanno Bertle ◽  
Andrea Dei ◽  
Matthias R. Gaberdiel
Keyword(s):  
Vertex Operator ◽  
Energy Tensor ◽  
Stress Energy Tensor ◽  
World Sheet ◽  
Stress Energy ◽  
The World

Abstract The large N limit of symmetric orbifold theories was recently argued to have an AdS/CFT dual world-sheet description in terms of an sl(2, ℝ) WZW model. In previous work the world-sheet state corresponding to the symmetric orbifold stress-energy tensor was identified. We calculate certain 2- and 3-point functions of the corresponding vertex operator on the world-sheet, and demonstrate that these amplitudes reproduce exactly what one expects from the dual symmetric orbifold perspective.

ON THE ELECTROMAGNETIC PERTURBATIONS OF A MULTICONICAL SPACETIME

1996 ◽  
Vol 11 (27) ◽  
pp. 2171-2177
Author(s):  
A.N. ALIEV
Keyword(s):  
Cosmic Strings ◽  
Energy Tensor ◽  
Stress Energy Tensor ◽  
Stress Energy ◽  
Electromagnetic Perturbations

The electromagnetic perturbations propagating in the multiconical spacetime of N parallel cosmic strings are described. The expression for vacuum average of the stress-energy tensor is reduced to a form involving only zero-spin-weighted perturbation modes.

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