Zobrazeno 1 - 10
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pro vyhledávání: '"Helliwell, T."'
Autor:
Helliwell, T. M., Konkowski, D. A.
A definition of quantum singularity for the case of static spacetimes has recently been extended to conformally static spacetimes. Here the theory behind quantum singularities in conformally static spacetimes is reviewed, and then applied to a class
Externí odkaz:
http://arxiv.org/abs/1302.3970
Autor:
Konkowski, D. A., Helliwell, T. M.
Publikováno v:
International Journal of Modern Physics A, Vol.26, No.22 (2011) 3878-3888
The definition of quantum singularity is extended from static space-times to conformally static space-times. After the usual definitions of classical and quantum singularities are reviewed, examples of quantum singularities in static space-times are
Externí odkaz:
http://arxiv.org/abs/1112.5488
Autor:
Helliwell, T. M., Konkowski, D. A.
Publikováno v:
Gen.Rel.Grav.43:695-701,2011
Recently Boehmer and Lobo have shown that a metric due to Florides, which has been used as an interior Schwarzschild solution, can be extended to reveal a classical singularity that has the form of a two-sphere. Here the singularity is shown to be a
Externí odkaz:
http://arxiv.org/abs/1006.5231
Autor:
Konkowski, D. A., Helliwell, T. M.
After reviewing the definitions of classical and quantum singularities, it is shown by example that if zeroth-order curvature invariants are regular, a diverging higher-order curvature invariant does not necessarily imply the existence of a classical
Externí odkaz:
http://arxiv.org/abs/1006.3771
Autor:
Konkowski, D. A., Helliwell, T. M.
We review the classical and quantum singularity structure of a broad class of spacetimes with asymptotically power-law behavior near the origin. Quantum considerations "heal" a large class of scalar curvature singularities.
Comment: 3 pages, no
Comment: 3 pages, no
Externí odkaz:
http://arxiv.org/abs/1006.3743
Autor:
Helliwell, T. M., Konkowski, D. A.
Publikováno v:
Class.Quant.Grav.24:3377-3390,2007
We study a broad class of spacetimes whose metric coefficients reduce to powers of a radius r in the limit of small r. Among these four-parameter "power-law" metrics we identify those parameters for which the spacetimes have classical singularities a
Externí odkaz:
http://arxiv.org/abs/gr-qc/0701149
Autor:
Konkowski, D. A., Helliwell, T. M.
Publikováno v:
Gen.Rel.Grav. 38 (2006) 1069-1082
The same but different: That might describe two metrics. On the surface CLASSI may show two metrics are locally equivalent, but buried beneath one may be a wealth of further structure. This was beautifully described in a paper by M.A.H. MacCallum in
Externí odkaz:
http://arxiv.org/abs/gr-qc/0412137
Levi-Civita spacetimes have classical naked singularities. They also have quantum singularities. Quantum singularities in general relativistic spacetimes are determined by the behavior of quantum test particles. A static spacetime is said to be quant
Externí odkaz:
http://arxiv.org/abs/gr-qc/0410114
Publikováno v:
Gravitation and Cosmology: Proceedings of the Spanish Relativity Meeting 2002, ed. A. Lobo (Barcelona, Spain: University of Barcelona Press, 2003) 193
The definitions of classical and quantum singularities in general relativity are reviewed. The occurence of quantum mechanical singularities in certain spherically symmetric and cylindrically symmetric (including infinite line mass)spacetimes is cons
Externí odkaz:
http://arxiv.org/abs/gr-qc/0408036