Results 111 to 120 of about 1,803 (203)

Directional Quantum Singularities in Curzon Spacetime

Universe
The scalar quantum probe method developed by Horowitz and Marolf is applied to the cylindrically symmetric Curzon solution. The main cause for choosing the Curzon solution is that it is the best-known example that exhibits directional singularity ...
Mert Mangut, Ozay Gurtug, Mustafa Halilsoy   +2 more
doaj   +1 more source

Classical and Quantum Strings in plane waves, shock waves and spacetime singularities: synthesis and new results

, 2003
Synthesis and new material. 18 pages, no figuresKey issues of classical and quantum strings in gravitational plane waves, shock waves and spacetime singularities are synthetically understood.
Sanchez, Norma G.
core   +3 more sources

Topological events on wave dislocation lines: birth and death of small loops, and reconnection

, 2007
In three-dimensional space, a wave dislocation, that is, a quantized (optical) vortex or phase singularity, is a line zero of a complex scalar wavefunction.
Dennis, MR, Berry, MV, Dennis, M.R., Berry, M V, Dennis, M R; id_orcid, Berry, M.V.   +5 more
core   +1 more source

On some universal features of the holographic quantum complexity of bulk singularities

Journal of High Energy Physics, 2018
We perform a comparative study of the time dependence of the holographic quantum complexity of some space like singular bulk gravitational backgrounds.
Stefano Bolognesi, Eliezer Rabinovici, Shubho R. Roy   +2 more
doaj   +1 more source

Spacetime averaging of exotic singularity universes

, 2011
Taking a spacetime average as a measure of the strength of singularities we show that big-rips (type I) are stronger than big-bangs. The former have infinite spacetime averages while the latter have them equal to zero.
Mariusz P. Da̧browski, Da̧browski, Mariusz P.   +1 more
core   +1 more source

Geometrical resolution of spacetime singularities

, 2010
General relativity predicts the existence of gravitational singularities at the classical level: our universe started with the big bang, and massive stars can collapse into black holes.
De Roo, Frederik
core  

Gravitational lensing from a spacetime perspective. [PDF]

, 2004
The theory of gravitational lensing is reviewed from a spacetime perspective, without quasi-Newtonian approximations. More precisely, the review covers all aspects of gravitational lensing where light propagation is described in terms of lightlike ...
Volker Perlick, Perlick Volker, Perlick, Volker   +2 more
core  

Spacelike Geodesics and Other Puzzles in the Mixmaster Universe [PDF]

, 2012
In this thesis we are going to investigate the behaviour of geodesics in a metric with a singularity known as the ``Mixmaster Universe''. This was motivated from previous work done, where the now well-known AdS/CFT correspondence was used to extract ...
KENWAY, ANGHARAD,SONIA, Kenway, Angharad Sonia   +1 more
core  

Aspects of plane waves and Taub-NUT as exact string theory solutions [PDF]

, 2004
This thesis is a study of some aspects of string theory solutions that are exact in the inverse string tension ɑ', and thus are valid beyond the low-energy limit.
Svendsen, Harald Georg
core  

New singularities in unexpected places

, 2015
Spacetime singularities have been discovered which are physically much weaker than those predicted by the classical singularity theorems. Geodesics evolve through them and they only display infinities in the derivatives of their curvature invariants.

core   +1 more source