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The multiparty coherent channel and its implementation with linear optics.

Guangqiang He, Taizhi Liu, Xin Tao

|October 10, 2013

Summary

This summary is machine-generated.

Multiparty continuous-variable coherent channels enable advanced quantum communication. This study defines these channels and proposes two linear optics implementation methods for enhanced quantum information processing.

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Area of Science:

Quantum Information Science
Quantum Communication

Background:

The continuous-variable coherent (conat) channel is fundamental for quantum communication tasks like teleportation and superdense coding.
Extending these capabilities to multiparty scenarios is crucial for scalable quantum networks.

Purpose of the Study:

To define and propose implementations for multiparty continuous-variable coherent channels.
To explore novel quantum communication protocols in multiparty settings.

Main Methods:

Definition of multiparty position-quadrature and momentum-quadrature conat channels.
Implementation using linear optics, including a multiparty coherent communication assisted by entanglement and classical communication (CCAECC) protocol.
Development of a multiparty coherent superdense coding protocol.

Main Results:

Successful extension of the conat channel concept to multiparty systems.
Demonstration of two distinct linear optics-based implementation strategies.
Establishment of protocols for multiparty quantum information transfer.

Conclusions:

Multiparty continuous-variable coherent channels are feasible and offer new avenues for quantum communication.
The proposed methods provide practical blueprints for realizing these advanced quantum channels.