Nuno C. Dias

collaborators

2 papers

quant-ph2026

Extreme non-negative Wigner functions

Zacharie Van Herstraeten, Jack Davis, Nuno C. Dias +3

Providing an operational characterization of the Wigner-positive states (WPS), i.e., the set of quantum states with non-negative Wigner function, is a longstanding open problem. Fo…

math-ph2025

Characterising the sets of quantum states with non-negative Wigner function

Nicolas J. Cerf, Ulysse Chabaud, Jack Davis +3

For Hilbert spaces $H \subseteq L^{2} (R)$ we consider the convex sets $D_{+} (H)$ of Wigner-positive states (WPS), i.e.~density matrices over $\mathcal…