Optimal distillation of quantum coherence with reduced waste of resources

TL;DR

This paper introduces an optimal probabilistic method for distilling quantum coherence from pure states, minimizing resource waste and enabling efficient quantum resource manipulation.

Contribution

It presents a novel strictly incoherent operation protocol for distilling maximally coherent states with reduced resource waste, including an extension to avoid waste for certain initial states.

Findings

Protocol produces maximally coherent states of variable dimension

Achieves resource-efficient quantum coherence distillation

Provides practical schemes for quantum resource management

Abstract

We present an optimal probabilistic protocol to distill quantum coherence. Inspired by a specific entanglement distillation protocol, our main result yields a strictly incoherent operation that produces one of a family of maximally coherent states of variable dimension from any pure quantum state. We also expand this protocol to the case where it is possible, for some initial states, to avert any waste of resources as far as the output states are concerned, by exploiting an additional transformation into a suitable intermediate state. These results provide practical schemes for efficient quantum resource manipulation.