Quantum singularities in (2+1) dimensional matter coupled black hole spacetimes
Küçük Resim Yok
Tarih
2012
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
APS Physics
Erişim Hakkı
Attribution-NonCommercial 3.0 United States
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
Özet
Quantum singularities considered in the 3 D BTZ spacetime by Pitelli and Letelier (Phys. Rev. D77: 124030, 2008) is extended to charged BTZ and 3D Einstein-Maxwell-dilaton gravity spacetimes. The occurence of naked singularities in the Einstein-Maxwell extension of the BTZ spacetime both in linear and non-linear electrodynamics as well as in the Einstein-Maxwell-dilaton gravity spacetimes are analysed with the quantum test fields obeying the Klein-Gordon and Dirac equations. We show that with the inclusion of the matter fields; the conical geometry near r = 0 is removed and restricted classes of solutions are admitted for the Klein-Gordon and Dirac equations. Hence, the classical central singularity at r = 0 turns out to be quantum mechanically singular for quantum particles obeying Klein-Gordon equation but nonsingular for fermions obeying Dirac equation. Explicit calculations reveal that the occurrence of the timelike naked singularities in the considered spacetimes do not violate the cosmic censorship hypothesis as far as the Dirac fields are concerned. The role of horizons that clothes the singularity in the black hole cases is replaced by repulsive potential barrier against the propagation of Dirac fields.
Açıklama
Anahtar Kelimeler
Quantum singularity, naked singularity, 2+1 dimensional spacetimes
Kaynak
Physical review D - Arxiv
WoS Q Değeri
Scopus Q Değeri
Q1
Cilt
Sayı
Künye
Gürtuğ, Ö. ve Ünver, Ö. (2012). Quantum singularities in (2+1) dimensional matter coupled black hole spacetimes. Physical review D - Arxiv. s. 1-14.
