Superdense Coding over Optical Fiber Links with Complete Bell-State Measurements
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Updated: Mar 7, 2026

Quasi-light Storage for Optical Data Packets
Published on: February 6, 2014
Brian P Williams1, Ronald J Sadlier1, Travis S Humble1
1Quantum Computing Institute, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
Abstract:
Adopting quantum communication to modern networking requires transmitting quantum information through a fiber-based infrastructure. We report the first demonstration of superdense coding over optical fiber links, taking advantage of a complete Bell-state measurement enabled by time-polarization hyperentanglement, linear optics, and common single-photon detectors. We demonstrate the highest single-qubit channel capacity to date utilizing linear optics, 1.665±0.018, and we provide a full experimental implementation of a hybrid, quantum-classical communication protocol for image transfer.
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