Universality of stringy horizons across fields at finite 't Hooft coupling

Ascertain whether horizons defined via half-sided modular inclusions for different single-trace operators coincide in the thermofield double state at finite ’t Hooft coupling (finite λ). Establish, or refute, the existence of a universal stringy horizon shared by all fields in the stringy regime.

Background

In the stringy regime, different single-trace operators (dual to stringy fields) may experience different effective metrics, raising the possibility that the associated horizons defined via half-sided modular inclusions need not coincide.

Determining whether a universal stringy horizon exists would clarify to what extent geometric notions survive at finite λ and how bulk causal structure emerges from boundary operator algebras in the stringy regime.