On the Hagedorn Behaviour of Singular Scale-Invariant Plane Waves

  title={On the Hagedorn Behaviour of Singular Scale-Invariant Plane Waves},
  author={Matthias Blau},
As a step towards understanding the properties of string theory in time-dependent and singular spacetimes, we study the divergence of density operators for string ensembles in singular scale-invariant plane waves, i.e. those plane waves that arise as the Penrose limits of generic spacetime singularities. We show that the scale invariance implies that the Hagedorn behaviour of bosonic and supersymmetric strings in these backgrounds, even with the inclusion of RR or NS fields, is the same as that… CONTINUE READING

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