Hagedorn transition and chronology protection in string theory

Details Hagedorn transition and chronology protection in string theory Hagedorn transition and chronology protection in string theory

2005-04-12

arxiv.org/abs/hep-th/0504102v2

Nucl.Phys. B728 (2005) 148-178

Physics

High Energy Physics

High Energy Physics - Theory

40 pages, 11 figures. Expanded discussion on evolution of on-shell modes and added appendix

Scientific paper

10.1016/j.nuclphysb.2005.08.022

We conjecture chronology is protected in string theory due to the condensation of light winding strings near closed null curves. This condensation triggers a Hagedorn phase transition, whose end-point target space geometry should be chronological. Contrary to conventional arguments, chronology is protected by an infrared effect. We support this conjecture by studying strings in the O-plane orbifold, where we show that some winding string states are unstable and condense in the non-causal region of spacetime. The one-loop string partition function has infrared divergences associated to the condensation of these states.

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