Two-qutrit steering detection turns to correlation-enhanced quantum reservoirs: unseen Werner-state accuracy reaches 96%, and new steerable partially entangled states are flagged
Deciding whether a mixed two-qutrit state is steerable has relied on semidefinite programming over a finite measurement set, and that does not necessarily carry over to a different state family. Correlation-enhanced quantum reservoir processing (CEQRP) adds two-body spin-correlation readouts from a spin-1 reservoir to the feature vector, letting logistic regression reach high accuracy on unseen Werner and isotropic states. With training augmented by samples certified by two steering criteria, classifiers flagged partially entangled states whose steerability semidefinite programming then independently confirmed using seven projective measurement settings.