### Abstract

We study the spectrum of permutation orbifolds of 2d CFTs. We find examples where the light spectrum grows faster than Hagedorn, which is different from known cases such as symmetric orbifolds. We also describe how to compute their partition functions using a generalization of Hecke operators.

Original language | English (US) |
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Pages (from-to) | 1559-1572 |

Number of pages | 14 |

Journal | Letters in Mathematical Physics |

Volume | 109 |

Issue number | 7 |

DOIs | |

State | Published - Jul 1 2019 |

Externally published | Yes |

### Keywords

- Conformal field theory
- Holography
- Orbifolds
- Permutation groups

### ASJC Scopus subject areas

- Statistical and Nonlinear Physics
- Mathematical Physics

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## Cite this

Keller, C. A., & Mühlmann, B. J. (2019). The spectrum of permutation orbifolds.

*Letters in Mathematical Physics*,*109*(7), 1559-1572. https://doi.org/10.1007/s11005-019-01162-2