28 citations · 28 across the 1 of their papers we have counts for
5 papers
Hagedorn transition and chronology protection in string theory
Miguel S. Costa, Carlos A. R. Herdeiro, J. Penedones +1
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 transit…
Orientation matters for NIMreps
N. Sousa, A. N. Schellekens
The problem of finding boundary states in CFT, often rephrased in terms of "NIMreps" of the fusion algebra, has a natural extension to CFT on non-orientable surfaces. This provides…
Open Descendents of U(2N) Orbifolds at Rational Radii
A. N. Schellekens, N. Sousa
We construct explicitly the open descendants of some exceptional automorphism invariants of U(2N) orbifolds. We focus on the case N=pq, p and q prime, and on the automorphisms of t…
Open Descendants of Non-Diagonal Invariants
L. R. Huiszoon, A. N. Schellekens, N. Sousa
The open descendants of simple current automorphism invariants are constructed. We consider the case where the order of the current is two or odd. We prove that our solutions satis…
Klein Bottles and Simple Currents
L. R. Huiszoon, A. N. Schellekens, N. Sousa
The standard Klein bottle coefficient in the construction of open descendants is shown to equal the Frobenius-Schur indicator of a conformal field theory. Other consistent Klein bo…