Ultrafast and fault-tolerant quantum communication across long distances.

Journal Article (Journal Article)

Quantum repeaters (QRs) provide a way of enabling long distance quantum communication by establishing entangled qubits between remote locations. In this Letter, we investigate a new approach to QRs in which quantum information can be faithfully transmitted via a noisy channel without the use of long distance teleportation, thus eliminating the need to establish remote entangled links. Our approach makes use of small encoding blocks to fault-tolerantly correct both operational and photon loss errors. We describe a way to optimize the resource requirement for these QRs with the aim of the generation of a secure key. Numerical calculations indicate that the number of quantum memory bits at each repeater station required for the generation of one secure key has favorable polylogarithmic scaling with the distance across which the communication is desired.

Full Text

Duke Authors

Cited Authors

  • Muralidharan, S; Kim, J; Lütkenhaus, N; Lukin, MD; Jiang, L

Published Date

  • June 2014

Published In

Volume / Issue

  • 112 / 25

Start / End Page

  • 250501 -

PubMed ID

  • 25014798

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.112.250501


  • eng