Touring the Hagedorn ridge

@article{Barbn2004TouringTH,
  title={Touring the Hagedorn ridge},
  author={Jos{\'e} L F Barb{\'o}n and Eliezer Rabinovici},
  journal={arXiv: High Energy Physics - Theory},
  year={2004},
  pages={1973-2008}
}
We review aspects of the Hagedorn regime in critical string theories, from basic facts about the ideal gas approximation to the proposal of a global picture inspired by general ideas of holography. It was suggested that the condensation of thermal winding modes triggers a first-order phase transition. We propose, by an Euclidean analogue of the string/black hole correspondence principle, that the transition is actually related to a topology change in spacetime. Similar phase transitions induced… 

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