Instability of space - like and null orbifold singularities

Jun, 2002
16 pages
Published in:
  • Phys.Rev.D 66 (2002) 103512
e-Print:

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Abstract:
Time dependent orbifolds with spacelike or null singularities have recently been studied as simple models of cosmological singularities. We show that their apparent simplicity is an illusion: the introduction of a single particle causes the spacetime to collapse to a strong curvature singularity (a Big Crunch), even in regions arbitrarily far from the particle.
  • 98.80.Cq
  • 11.25.-w
  • cosmological model
  • string model
  • orbifold
  • boundary condition
  • stability
  • space-time: singularity