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

Sep 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008mgm..conf.2887h&link_type=abstract

"THE ELEVENTH MARCEL GROSSMANN MEETING On Recent Developments in Theoretical and Experimental General Relativity, Gravitation an

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We conjecture that 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 a particular Lorentzian orbifold of Minkowski spacetime, where we show that some winding string states are unstable and condense in the non-causal region of spacetime. The one loop partition function has infrared divergences associated to the condensation of these states.

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