One-Shot Manipulation of Dynamical Quantum Resources

TL;DR

This paper introduces a comprehensive framework for analyzing one-shot transformations of dynamical quantum resources, connecting operational tasks with resource quantifiers across various quantum theories.

Contribution

It develops universal conditions for resource transformations, applicable to all dynamical quantum resources, and provides exact characterizations for key tasks like distillation and dilution.

Findings

Derived necessary and sufficient conditions for resource transformations.

Exact expressions for one-shot quantum capacity and simulation costs.

Operational applications to nonlocality, contextuality, and measurement incompatibility.

Abstract

We develop a unified framework to characterize one-shot transformations of dynamical quantum resources in terms of resource quantifiers, establishing universal conditions for exact and approximate transformations in general resource theories. Our framework encompasses all dynamical resources represented as quantum channels, including those with a specific structure --- such as boxes, assemblages, and measurements --- thus immediately applying in a vast range of physical settings. For the particularly important manipulation tasks of distillation and dilution, we show that our conditions become necessary and sufficient for broad classes of important theories, enabling an exact characterization of these tasks and establishing a precise connection between operational problems and resource monotones based on entropic divergences. We exemplify our results by considering explicit applications to: quantum communication, where we obtain exact expressions for one-shot quantum capacity and simulation cost assisted by no-signalling, separability-preserving, and positive partial transpose-preserving codes; as well as to nonlocality, contextuality, and measurement incompatibility, where we present operational applications of a number of relevant resource measures.