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Thermodynamical properties of some coset CFT backgrounds
Author(s) -
Giveon A.,
Konechny A.,
Rabinovici E.,
Sever A.
Publication year - 2006
Publication title -
fortschritte der physik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.469
H-Index - 71
eISSN - 1521-3978
pISSN - 0015-8208
DOI - 10.1002/prop.200510259
Subject(s) - coset , physics , euclidean geometry , mathematical physics , string theory , singularity , theoretical physics , string (physics) , black hole (networking) , isotropy , quantum mechanics , mathematics , mathematical analysis , combinatorics , geometry , computer network , routing protocol , routing (electronic design automation) , computer science , link state routing protocol
We investigate the thermodynamical features of two Lorentzian signature backgrounds that arise in string theory as exact CFTs and possess more than two disconnected asymptotic regions: the 2‐d charged black hole and the Nappi‐Witten cosmological model. We find multiple smooth disconnected Euclidean versions of the charged black hole background. They are characterized by different temperatures and electro‐chemical potentials. We find that there is no straightforward analog of the Hartle‐Hawking state that would express these thermodynamical features. We also obtain multiple Euclidean versions of the Nappi‐Witten cosmological model and study their singularity structure. It suggests to associate a non‐isotropic temperature with this background.