Towards a String Realization of the Dark Dimension via T-folds

TL;DR

This paper investigates realizing the Dark Dimension Scenario through T-fold compactifications on a specific internal space, stabilizing moduli via duality twists, and exploring potential trajectories consistent with the scenario.

Contribution

It introduces a novel string-theoretic construction of the Dark Dimension using T-folds and duality twists to stabilize extra dimensions.

Findings

Successfully stabilizes volume moduli using duality twists.

Generates a potential with runaway directions aligned with the Dark Dimension.

Provides a decreasing potential trajectory compatible with the Dark Dimension Scenario.

Abstract

In this work, we explore the feasibility of realizing the Dark Dimension Scenario through T-fold compactifications on $T^5 \times S^1$, where the base of the internal space $S^1$ naturally acts as the requisite mesoscopic extra dimension. Utilizing Scherk--Schwarz reduction from 5D to 4D, and applying duality twists from both elliptic and parabolic conjugacy classes of subgroups of the T-duality group associated with $T^5$, we stabilize the volume of $T^5$ and several other moduli. This approach generates a potential characterized by two runaway directions, one aligned with the Scherk--Schwarz radion. Further stabilization efforts yield a decreasing potential trajectory demanded by the Dark Dimension Scenario.