The operator algebra of cyclic orbifolds

Benoit Estienne; Yacine Ikhlef; Andrei Rotaru

doi:10.1088/1751-8121/acfcf6

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arXiv · 2212.07678

The operator algebra of cyclic orbifolds

Benoit Estienne·Yacine Ikhlef·Andrei Rotaru

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Abstract

We identify the maximal chiral algebra of conformal cyclic orbifolds. In terms of this extended algebra, the orbifold is a rational and diagonal conformal field theory, provided the mother theory itself is also rational and diagonal. The operator content and operator product expansion of the cyclic orbifolds are revisited in terms of this algebra. The fusion rules and fusion numbers are computed via the Verlinde formula. This allows one to predict which conformal blocks appear in a given four-point function of twisted or untwisted operators, which is relevant for the computation of various entanglement measures in one-dimensional critical systems.

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Benoit Estienne, Yacine Ikhlef, Andrei Rotaru. 2022-12-15. The operator algebra of cyclic orbifolds. https://doi.org/10.1088/1751-8121/acfcf6

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