From Osher Doctorow
Contrary to the Local Quantum Physics viewpoint discussed here
earlier, black holes receive another support from Italy and China
today.
"Quasinormal modes and phase transition of black holes," Xiaoping Rao
and Bin Wang (Fudan U., People's Republic of China) and Gushong Yang
(Shangai U., PRC), in arXiv: 0712.0645 v1 [gr-qc] 5 Dec 2007, 6 pages,
gives considerable support to a black hole phase transition, which in
another context was also argued by D. Birmingham, I. Sachs, S. n.
Solodukhin in Phys. Rev. Lett. 88 (2002) 151301 and D. Birmingham
Phys. Rev. D64 (2001) 064024.
This paper was also preceded by Paul P. Cook's site, "P. P. Cook's
Tangent Space," http://ppcook.blogspot.com/2006_03_01_archive.html,
Monday, March 27, 2006, etc., which describes the importance of one of
the two phase scenarios, BTZ black holes, based on various seminars in
Italy. Cook is a physics Postdoc at Scuola Normale Superiore de Pisa
Italy.
BTZ black holes were discovered by Banados, Teitelboim, and Zanelli,
who pointed out that only for them does precise agreement occur
between macroscopic and microscopic counts of black hole entropy. The
generic nonrotating BTZ black hole is considered in Rao, Wang, and
Yang (2007), and the other phase is that of massless BZ black holes
which are AdS (Anti-de Sitter space) black holes. Notice that the
first type are nonrotating (J = 0) while the second type are massless
(M = 0). The papers of Birmingham et al cited above also show that
presence or absence of complex poles in the field theory in momentum
representation of retarded correlation functions distinguishes between
the two scenarios.
Osher Doctorow
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