Communication with Quantum Catalysts

TL;DR

This paper explores how embezzling quantum catalysts can improve quantum and classical communication efficiency, even in noisy channels, and discusses reducing catalyst dimensions for practical implementation.

Contribution

It introduces the use of embezzling quantum catalysts to enhance information transmission and proposes methods to reduce catalyst dimensionality for real-world applications.

Findings

Embezzling catalysts increase channel capacity in noisy quantum communication.

Catalytic superdense coding improves classical information transmission.

Methods to reduce catalyst dimensions are proposed for practical use.

Abstract

Communication is essential for advancing science and technology. Quantum communication, in particular, benefits from the use of catalysts. During the communication process, these catalysts enhance performance while remaining unchanged. Although chemical catalysts that undergo deactivation typically perform worse than those that remain unaffected, quantum catalysts, referred to as embezzling catalysts, can surprisingly outperform their non-deactivating counterparts despite experiencing slight alterations. In this work, we employ embezzling quantum catalysts to enhance the transmission of both quantum and classical information. Our results reveal that using embezzling catalysts augments the efficiency of information transmission across noisy quantum channels, ensuring a non-zero catalytic channel capacity. Furthermore, we introduce catalytic superdense coding, demonstrating how embezzling catalysts can enhance the transmission of classical information. Finally, we explore methods to reduce the dimensionality of catalysts, a step toward making quantum catalysis a practical reality.