System design for a long-line quantum repeater

Rodney Van Meter, Thaddeus D. Ladd, W. J. Munro, Kae Nemoto

研究成果: Article査読

108 被引用数 (Scopus)

抄録

We present a new control algorithm and system design for a network of quantum repeaters, and outline the end-to-end protocol architecture. Such a network will create long-distance quantum states, supporting quantum key distribution as well as distributed quantum computation. Quantum repeaters improve the reduction of quantum-communication throughput with distance from exponential to polynomial. Because a quantum state cannot be copied, a quantum repeater is not a signal amplifier. Rather, it executes algorithms for quantum teleportation in conjunction with a specialized type of quantum error correction called purification to raise the fidelity of the quantum states. We introduce our banded purification scheme, which is especially effective when the fidelity of coupled qubits is low, improving the prospects for experimental realization of such systems. The resulting throughput is calculated via detailed simulations of a long line composed of shorter hops. Our algorithmic improvements increase throughput by a factor of up to 50 compared to earlier approaches, for a broad range of physical characteristics.

本文言語English
ページ(範囲)1002-1013
ページ数12
ジャーナルIEEE/ACM Transactions on Networking
17
3
DOI
出版ステータスPublished - 2009

ASJC Scopus subject areas

  • ソフトウェア
  • コンピュータ サイエンスの応用
  • コンピュータ ネットワークおよび通信
  • 電子工学および電気工学

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