Semiclassical corrections to the metric of multiple cosmic strings - Addendum

ALIEV A., Ozdemir N.

CLASSICAL AND QUANTUM GRAVITY, cilt.15, sa.12, ss.3937-3940, 1998 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 15 Sayı: 12
  • Basım Tarihi: 1998
  • Doi Numarası: 10.1088/0264-9381/15/12/020
  • Dergi Adı: CLASSICAL AND QUANTUM GRAVITY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.3937-3940
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

In the framework of semiclassical approach to quantum gravity we calculate the first order in h corrections to the metric around N parallel static, straight-line cosmic strings due to the back-reaction effects of massless quantized fields propagating in the multi-conical spacetime. The Einstein field equations which as a source in the right-hand side involve the vacuum average of the energy-momentum tensor of massless scalar, electromagnetic and spinor fields are solved perturbatively. We show that the semiclassical metric is no longer locally Bat, there is a 'Newtonian-like' potential which results in an attractive, or repulsive, gravitational force near multiple cosmic strings.