Simple bounds for one-shot pure-state distillation in general resource theories

Abstract

We present bounds for distilling many copies of a pure state from an arbitrary initial state in a general quantum resource theory. Our bounds apply to operations that are able to generate no more than a $\ensuremath{\delta}$ amount of resource, where $\ensuremath{\delta}\ensuremath{\ge}0$ is a given parameter. To maximize applicability of our upper bound, we assume little structure on the set of free states under consideration besides a weak form of superadditivity of the function ${G}_{\mathrm{min}}(\ensuremath{\rho})$, which measures the overlap between $\ensuremath{\rho}$ and the set of free states. Our bounds are given in terms of this function and the robustness of resource. Known results in coherence and entanglement theory are reproduced in this more general framework.