From Osher Doctorow
Besides hairy black holes, thick branes and domain walls have a
substantial literature on arXiv and are in agreement with the idea of
"thick" probability boundaries discussed here in recent Sections.
An excellent review paper as of 1997 on domain walls, both thick and
thin, is "Supergravity domain walls," Mirjam Cvetic of Institute for
Advanced Study Princeton (Cvetic has almost 200 papers in arXiv) and
Harald H. Soleng of the Theory division of CERN Geneva Switzerland,
arXiv: hep-th/9604090 v1 16 Apr 1996, 90 pages (updated in 1997).
There are also 30 papers in arXiv under the keywords "thick branes,"
the latest of which is "Thick brane in 7D and 8D spacetimes," Vladimir
Dzhunushaliev, Vladimir Folomeev, K. Myrzakulov, and R. Murzaukulov,
respectively Kyrgyz-Russian Slavic U., Institute of Physics of NASKR
Kyrgyz Republic, Institute of Physics and Technology Kazakhstan, etc.
Dzhunushalev has 48 papers in arXiv, while R. Murzakulov has 10. The
paper cited is from 2007.
The earliest paper in domain walls in arXiv, at least under "domain
walls" keywords, is by Csaba Czaki, Joshua Ehrlich, Timothy J.
Hollowood, and Yuri Shirnan (1st 3 of Los Alamos National Lab New
Mexico USA, last Princeton U, 3rd also of U Wales U.K.), hep-th/
0001083 v2 21 Jan 2000.
See also Wikipedia and Wolfram on domain walls, and Y. Modisawa et al
(Modisawa of Osaka City U. Japan) "Thick domain walls around a black
hole," arXiv: gr-qc/0209070 v2 13 Nov 2002, 18 pages. This paper
defines thick versus thin domain walls as respectively those for which
for which horizon radius divided by wall's radius is < 1 or > 1.
Osher Doctorow
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