Irreversibility of Entanglement Concentration for Pure State

Wataru Kumagai, Masahito Hayashi

For a pure state $\psi$ on a composite system ${\mathcal{H}}_A\otimes {\mathcal{H}}_B$, both the entanglement cost $E_C(\psi )$ and the distillable entanglement $E_D(\psi )$ coincide with the von…