Researchers reach quantum networking milestone in real-world environment

Phys.org  October 6, 2021
A team of researchers in the US (Oak Ridge National Laboratory, Stanford University, Purdue University) implemented flex-grid entanglement distribution in a deployed network connecting nodes in three distinct campus buildings time synchronizing via the Global Positioning System. They quantify the quality of the distributed polarization entanglement via log-negativity, which offers a generic metric of link performance in entangled bits per second. After demonstrating successful entanglement distribution for two allocations of their eight dynamically reconfigurable channels, they realized the first deployed fiber network demonstration of remote state preparation (RSP), a fundamental quantum communications protocol with utility for performing remote private “blind” quantum computing. They also demonstrated RSP not only at one location but over three nodes in three locations. Their results highlight an advanced paradigm for managing entanglement resources in quantum networks of ever-increasing complexity and service demands…read more. TECHNICAL ARTICLE

QLAN communication layers and services… Credit:PRX Quantum 2, 040304, 6 October 2021 

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