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Related Experiment Video

Updated: Feb 15, 2026

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Quantum Communication Using Coherent Rejection Sampling.

Anurag Anshu¹, Vamsi Krishna Devabathini¹, Rahul Jain²

¹Centre for Quantum Technologies, National University of Singapore, 21 Lower Kent Ridge Rd, 119077 Singapore.

Physical Review Letters

|January 18, 2018

Summary

This summary is machine-generated.

This study introduces a new quantum message compression technique using entanglement and a novel convex split lemma. This advances quantum information theory by providing efficient protocols for state merging, splitting, and redistribution.

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Area of Science:

Quantum Information Theory
Quantum Communication Protocols

Background:

Quantum information theory relies on efficient message compression, with early schemes by Schumacher and subsequent developments.
One-shot characterization of quantum tasks remains underdeveloped and often disconnected from classical analogues.

Purpose of the Study:

To develop a new technique for quantum message compression utilizing entanglement.
To establish a direct connection between classical and quantum communication tasks through a novel tool.

Main Methods:

Introduction of the 'convex split lemma,' a quantum analogue of classical rejection sampling.
Application of the convex split lemma to devise new quantum communication protocols.

Main Results:

New explicit protocols for quantum state merging, splitting, and redistribution with tight communication costs.
A port-based teleportation scheme requiring fewer ports when input information is known.

Conclusions:

The convex split lemma provides a powerful tool for quantum information processing.
This work bridges the gap between classical and quantum communication characterizations, offering practical advancements.