Optimal architectures for long distance quantum communication

By Sreraman Muralidharan, Linshu Li, Jungsang Kim, Norbert Lutkenhaus, Mikhail D. Lukin, Liang Jiang. Scientific Reports, 2015

493 citations recorded by the source corpus.

Despite the tremendous progress of quantum cryptography, efficient quantum communication over long distances (≥1000 km) remains an outstanding challenge due to fiber attenuation and operation errors accumulated over the entire communication distance. Quantum repeaters (QRs), as a promising approach, can overcome both photon loss and operation errors and hence significantly speedup the communication rate. Depending on the methods used to correct loss and operation errors, all the proposed QR schemes can be classified into three categories (generations). Here we present the first systematic comparison of three generations of quantum repeaters by evaluating the cost of both temporal and physical resources and identify the optimized quantum repeater architecture for a given set of experimental parameters for use in quantum key distribution. Our work provides a roadmap for the experimental realizations of highly efficient quantum networks over transcontinental distances.

Subfields: Artificial Intelligence, Atomic and Molecular Physics, and Optics

View Paper: https://www.semanticscholar.org/paper/a655d9865a6ad11cb2960bdc979b6a892a173454

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Citations in the corpus

Quantum information processing and quantum optics with circuit quantum electrodynamics (2020, background): “Such brute-force approaches are viable up to around 1,000 qubits — a loose estimate — limited primarily by packaging, signal routing and the size of dilution refrig-a”
Advances in quantum cryptography (2019, unknown): “Depending on the state of the art on quantum computing, we can then envisage several different stages of development for quantum repeaters [649, 650].”
A Survey on Green 6G Network: Architecture and Technologies (2019, background): “QC into shorter intermediate segments and correcting both photon loss and operation errors [68].”
One-Way Quantum Repeater Based on Near-Deterministic Photon-Emitter Interfaces (2019, background): “, one-way quantum repeaters based on the quantum parity encoding [11,12,15], which requires a number of two-qubit operations that scale linearly with the size of the encoding corresponding to hundreds of memory qubits per repeater station [7].”
Private quantum computation: an introduction to blind quantum computing and related protocols (2016, background): “Long distance optical links allowing for the transmission of quantum states have already undergone significant development, primarily in the context of quantum key distribution, though communication over extreme distances will require networks integrating quantum repeaters.(90) Secure delegation of ”