We investigate existence and properties of discrete mixture representations Pθ = ∑i∈Ewθ(i) Qi for a given family Pθ, θ ∈Θ, of probability measures. The noncentral chi-squared distributions provide a classi-cal example. We ...

Recent experiments demonstrated the generation of entanglement by quasiadiabatically driving through quantum phase transitions of a ferromagnetic spin-1 Bose-Einstein condensate in the presence of a tunable quadratic Zeeman ...