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Superdense coding for quantum networking environments...

by Travis S Humble, Brian P Williams, Ronald J Sadlier Iii
Publication Type
Conference Paper
Journal Name
Proceedings of SPIE
Book Title
Proceedings Volume 10547, Advances in Photonics of Quantum Computing, Memory, and Communication XI
Publication Date
Volume
10547
Publisher Location
United States of America
Conference Name
SPIE Photonics West
Conference Location
San Fransisco, California, United States of America
Conference Sponsor
SPIE
Conference Date
-

Quantum networks provide a versatile infrastructure for communication, computing, and sensing with quantum information. Novel sources and detectors for transmitting and receiving quantum states are critical elements in the development and eventual deployment of robust quantum networks. Alongside performance, the compatibility of quantum network devices with modern networking infrastructure is an important requirement for deployment. We present results on the integration of quantum communication using superdense coding transmitted over optical fiber links into network environments. Our approach takes advantage of a novel complete Bell-state measurement setup that relies on hyper-entanglement in the temporal and polarization degrees of freedom for a two-photon state emitted from a quantum light source. Using linear optics and common single-photon detectors, we record a single-qubit channel capacity of 1.665±0.018. We then demonstrate a full experimental implementation of hybrid, quantum-classical communication protocol for image transfer applications. Our devices integrate with existing fiber optical network and software-defined transmitters and receivers as part of a modular design to provide an extensible quantum communication system that can adapt to future quantum technology goals.