Preprint
Aug 2026
Unveiling Spectral Mechanisms in Training-Free LLM Text Detection
It is shown that the strength of this signal depends on text length and sampling range: spectral evidence is clearest for long, continuous, constrained generation, while short, fragmented, mixed, and edited settings require complementary confidence and fluctuation views.
Haitong Luo, Xuying Meng, Weiyao Zhang et al.
· 1 citation