arxiv5/19/2026, 2:38:13 AM
Wigner-Function Negativity Exposes Hard Limits of Semiclassical Barrier Transmission ModelsThis paper numerically investigates the transmission of displaced Fock states through an inverted-oscillator potential barrier, demonstrating that semiclassical methods systematically fail where Wigner-function negativity is present. While semiclassical simulations reproduce bulk…