Time-dependent wormhole in an inhomogeneous spherically symmetric space time with a cosmological constant

2010 ◽  
Vol 331 (1) ◽  
pp. 315-320 ◽  
Author(s):  
M. R. Bordbar ◽  
N. Riazi
Keyword(s):  
Symmetric Space ◽  
Cosmological Constant ◽  
Space Time ◽  
Time Dependent ◽  
Spherically Symmetric

Induced Quantum Fluctuations in the Spherically Symmetric Space–Time

1997 ◽  
Vol 12 (18) ◽  
pp. 3171-3180 ◽  
Author(s):  
Kamal K. Nandi ◽  
Anwarul Islam ◽  
James Evans
Keyword(s):  
Symmetric Space ◽  
Light Cone ◽  
Quantum Fluctuation ◽  
Quantum Fluctuations ◽  
Dynamical Variable ◽  
Nonrelativistic Limit ◽  
Space Time ◽  
Spherically Symmetric ◽  
Speed Of Light

In the Schwarzschild field due to a mass moving with velocity v → c0, where c0 is the speed of light in vacuum, the source-induced quantum fluctuation in the light cone exhibits consistency with the Aichelburg–Sexl solution while that in the metric dynamical variable does not. At the horizon, none of the fluctuations is proportional to anything finite. However, in the nonrelativistic limit (v → 0), known expressions follow.

String cosmology in spherically symmetric space‐time

1992 ◽  
Vol 33 (6) ◽  
pp. 2336-2338 ◽  
Author(s):  
Subenoy Chakraborty ◽  
Ashok Kr. Chakraborty
Keyword(s):  
Symmetric Space ◽  
Space Time ◽  
String Cosmology ◽  
Spherically Symmetric

Proper projective symmetry in the most general non-static spherically symmetric four-dimensional Lorentzian manifolds

2016 ◽  
Vol 13 (02) ◽  
pp. 1650009 ◽  
Author(s):  
Ghulam Shabbir ◽  
F. M. Mahomed ◽  
M. A. Qureshi
Keyword(s):  
Symmetric Space ◽  
Special Class ◽  
Space Time ◽  
Spherically Symmetric ◽  
Direct Integration ◽  
Lorentzian Manifolds

A study of proper projective symmetry in the most general form of non-static spherically symmetric space-time is given using direct integration and algebraic techniques. In this study, we show that when the above space-time admits proper projective symmetry it becomes a very special class of static spherically symmetric space-times.

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