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Quasi-light Storage for Optical Data Packets

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Published on: February 6, 2014

Information trade-offs for optical quantum communication.

Mark M Wilde¹, Patrick Hayden, Saikat Guha

¹School of Computer Science, McGill University, Montreal, Québec H3A 2A7, Canada.

Physical Review Letters

|May 1, 2012

Summary

This summary is machine-generated.

Trade-off coding significantly enhances quantum communication tasks. This technique achieves remarkable performance gains in bosonic channels, outperforming traditional methods for simultaneous classical and quantum information transfer.

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Area of Science:

Quantum Information Science
Quantum Communication
Information Theory

Background:

Established trade-offs exist between classical communication, quantum communication, and entanglement distribution in quantum channels.
Previous trade-off coding benefits were too small for practical applications, limited to specific channels like dephasing and universal cloning machines.

Purpose of the Study:

To demonstrate significant performance gains using trade-off coding for physically relevant bosonic channels.
To explore the application of trade-off coding in simultaneously transmitting classical and quantum information over secret-key-assisted bosonic channels.

Main Methods:

Characterization of the achievable trade-off region between classical communication (bits), quantum communication (qubits), and entanglement distribution (ebits) per channel use.
Application of trade-off coding techniques to various bosonic channel models, including those simulating free-space/fiber-optic links, thermal noise, and amplifiers.
Analysis of performance gains when trading photon-number resources for simultaneous public and private classical information transmission.

Main Results:

Trade-off coding achieves remarkably high performance gains for several physically relevant bosonic channels.
The demonstrated gains significantly outperform time-sharing strategies between individual task protocols.
Substantial performance improvements are shown for secret-key-assisted bosonic channels, enabling simultaneous classical information transmission.

Conclusions:

Trade-off coding offers a powerful technique for optimizing quantum information processing tasks in realistic bosonic channel scenarios.
The findings highlight the practical value of trade-off coding for enhancing communication capabilities in quantum networks and systems.
This work extends the applicability of trade-off coding to simultaneous classical and quantum information transfer, improving resource utilization.