Hong Liu et al JHEP06(2002)045 doi:10.1088/1126-6708/2002/06/045
Hong Liu1, Gregory Moore1 and Nathan Seiberg2
Show affiliationsWe consider string theory in a time dependent orbifold with a null singularity. The singularity separates a contracting universe from an expanding universe, thus constituting a big crunch followed by a big bang. We quantize the theory both in light-cone gauge and covariantly. We also compute some tree and one loop amplitudes which exhibit interesting behavior near the singularity. Our results are compatible with the possibility that strings can pass through the singularity from the contracting to the expanding universe, but they also indicate the need for further study of certain divergent scattering amplitudes.
E-print Number: hep-th/0204168
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Issue 06 (June 2002)
Received 20 June 2002, accepted for publication 21 June 2002
Published 27 June 2002
Hong Liu et al JHEP06(2002)045
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