Spherically symmetric black holes in Kaluza–Klein unification

1990 ◽  
Vol 31 (3) ◽  
pp. 695-698 ◽  
Author(s):  
Y. M. Cho ◽  
D. H. Park



1980 ◽  
Vol 77 (1) ◽  
pp. 7-8
Author(s):  
Basilis C. Xanthopoulos


2013 ◽  
Vol 52 (9) ◽  
pp. 3026-3031
Author(s):  
Ji-Jian Jiang ◽  
Yu-Jing Han




2010 ◽  
Vol 81 (4) ◽  
Author(s):  
Masoud Allahverdizadeh ◽  
Ken Matsuno ◽  
Ahmad Sheykhi


1989 ◽  
Vol 04 (19) ◽  
pp. 5119-5131 ◽  
Author(s):  
E. I. GUENDELMAN

Gravitational Bags are spherically symmetric solutions of higher-dimensional Kaluza Klein (K – K) theories, where the compact dimensions become very large near the center of the geometry, although they are small elsewhere. The K – K excitations therefore become very light when located near the center of this geometry and this appears to affect drastically the naive tower of the masses spectrum of K – K theories. In the context of string theories, string excitations can be enclosed by Gravitational Bags, making them not only lighter, but also localized, as observed by somebody, that does not probe the central regions. Strings, however, can still have divergent sizes, as quantum mechanics seems to demand, since the extra dimensions blow up at the center of the geometry. From a projected 4-D point of view, very massive string bits may lie inside their Schwarzschild radii, as pointed out by Casher, Gravitational Bags however are horizon free objects, so no conflict with macroscopic causality arises if the string excitations are enclosed by Gravitational Bags.





2014 ◽  
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Author(s):  
Masashi Kimura ◽  
Hideki Ishihara ◽  
Ken Matsuno ◽  
Takahiro Tanaka


2008 ◽  
Vol 78 (6) ◽  
Author(s):  
Ken Matsuno ◽  
Hideki Ishihara ◽  
Toshiharu Nakagawa ◽  
Shinya Tomizawa
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