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arXiv · 2609.10272

Unorientable supersymmetric compactifications of M-theory

Ilarion V. Melnikov·Ruben Minasian
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Abstract

We discuss orbifold compactifications of the type II string, where the orbifold combines a free action on a base manifold and the $(-1)^{\boldsymbol{F}_{\text{L}}}$ symmetry which acts by -1 on left-moving Ramond sectors. Such backgrounds can preserve minimal supersymmetry and lift to M-theory compactification on smooth unorientable manifolds.

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Ilarion V. Melnikov, Ruben Minasian. 2026-09-09. Unorientable supersymmetric compactifications of M-theory. https://arxiv.org/abs/2609.10272

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