Libertarian Agency and the Craig/Grünbaum Debate about Theistic Explanation of the Initial Singularity

2018 ◽  
Keyword(s):  
Initial Singularity

scholarly journals Initial singularity of the little bang

2007 ◽  
Vol 786 (1-4) ◽  
pp. 107-130 ◽  
Author(s):  
Kenji Fukushima ◽  
François Gelis ◽  
Larry McLerran
Keyword(s):  
Initial Singularity

scholarly journals Meaningless Questions in Cosmology and Relativistic Astrophysics

1976 ◽  
Vol 31 (11) ◽  
pp. 1271-1276 ◽  
Author(s):  
M. Heller ◽  
M. Reinhardt
Keyword(s):  
Event Horizon ◽  
Gravitational Collapse ◽  
Space Time ◽  
Initial Singularity ◽  
Relativistic Astrophysics ◽  
General Classification ◽  
The Universe

Abstract After a general classification of meaningless questions in science we concentrate on empirically meaningless questions. Introducing the concepts of informationally connected, semiconnected and disconnected observers, a formalism for the analysis of the informational structure of space-time is developed. We discuss some problems of epistemological nature in cosmology and blade hole physics. A number of questions like "What was 'before' the initial singularity of the universe?" or "What is the fate of matter in gravitational collapse inside the event horizon?" turn out to be empirically meaningless. We also show that a "wormhole" does not violate causality for the set of informationally connected observers who do not enter it.

scholarly journals On the initial singularity problem in rainbow cosmology

2015 ◽  
Vol 2015 (08) ◽  
pp. 005-005 ◽  
Author(s):  
Grasiele Santos ◽  
Giulia Gubitosi ◽  
Giovanni Amelino-Camelia
Keyword(s):  
Initial Singularity ◽  
Singularity Problem

A NEW LOOK AT THE BIG BANG

2008 ◽  
Vol 17 (03n04) ◽  
pp. 635-639 ◽  
Author(s):  
PAUL S. WESSON
Keyword(s):  
Extra Dimensions ◽  
Big Bang ◽  
Initial Singularity ◽  
Unified Theories ◽  
The Big Bang ◽  
New Look

We give a mathematically exact and physically faithful embedding of curved 4D cosmology in a flat 5D space, thereby enabling visualization of the big bang in a new and informative way. In fact, in unified theories of fields and particles with real extra dimensions, it is possible to dispense with the initial singularity.

scholarly journals DUALITY AND COSMOLOGICAL COMPACTIFICATION OF SUPERSTRINGS WITH UNBROKEN SUPERSYMMETRY

1999 ◽  
Vol 14 (07) ◽  
pp. 1035-1047
Author(s):  
H. K. JASSAL ◽  
A. MUKHERJEE ◽  
R. P. SAXENA
Keyword(s):  
Scale Factor ◽  
Initial Singularity ◽  
Superstring Theory ◽  
Duality Transformation ◽  
Yang Mills ◽  
Consistency Conditions ◽  
Cosmological Solutions ◽  
Super Yang Mills Theory

The cosmological compactification of D=10, N=1 supergravity–super-Yang–Mills theory obtained from superstring theory is studied. The constraint of unbroken N=1 supersymmetry is imposed. A duality transformation is performed on the resulting consistency conditions. The original equations as well as the transformed equations are solved numerically to obtain new configurations with a nontrivial scale factor and a dynamical dilaton. It is shown that various classes of solutions are possible, which include cosmological solutions with no initial singularity.

scholarly journals AN EARLY UNIVERSE MODEL WITH STIFF MATTER AND A COSMOLOGICAL CONSTANT

2011 ◽  
Vol 03 ◽  
pp. 254-265 ◽  
Author(s):  
G. OLIVEIRA-NETO ◽  
G. A. MONERAT ◽  
E. V. CORRÊA SILVA ◽  
C. NEVES ◽  
L. G. FERREIRA FILHO
Keyword(s):  
Cosmological Constant ◽  
Perfect Fluid ◽  
Scale Factor ◽  
Initial Singularity ◽  
Discrete Energy ◽  
Classical Level ◽  
Stiff Matter ◽  
Expectation Value ◽  
Variational Formalism ◽  
Friedmann Robertson Walker

In the present work, we study the quantum cosmology description of a Friedmann-Robertson-Walker model in the presence of a stiff matter perfect fluid and a negative cosmological constant. We work in the Schutz's variational formalism and the spatial sections have constant negative curvature. We quantize the model and obtain the appropriate Wheeler-DeWitt equation. In this model the states are bounded therefore we compute the discrete energy spectrum and the corresponding eigenfunctions. In the present work, we consider only the negative eigenvalues and their corresponding eigenfunctions. This choice implies that the energy density of the perfect fluid is negative. A stiff matter perfect fluid with this property produces a model with a bouncing solution, at the classical level, free from an initial singularity. After that, we use the eigenfunctions in order to construct wave packets and evaluate the time-dependent expectation value of the scale factor. We find that it oscillates between maximum and minimum values. Since the expectation value of the scale factor never vanishes, we confirm that this model is free from an initial singularity, also, at the quantum level.

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