arxivquant-phcs.LG2026-07-06
Quantum Spectral Anomaly Detection
Yewei Yuan, Michele Minervini, Mark M. Wilde, Nana Liu
A core task in quantum anomaly detection is to compute an anomaly score that quantifies how strongly a test quantum state deviates from a given quantum dataset assumed to be normal. Classically, principal component analysis (PCA) for centered data computes the anomaly score by ev…