All-photonic quantum repeaters

Quantum communication holds promise for unconditionally secure transmission of secret messages and faithful transfer of unknown quantum states. Photons appear to be the medium of choice for quantum communication. Owing to photon losses, robust quantum communication over long lossy channels requires quantum repeaters. It is widely believed that a necessary and highly demanding requirement for quantum repeaters is the existence of matter quantum memories. Here we show that such a requirement is, in fact, unnecessary by introducing the concept of all-photonic quantum repeaters based on flying qubits. In particular, we present a protocol based on photonic cluster-state machine guns and a loss-tolerant measurement…

• MO
  Ministry of Education, Culture, Sports, Science and Technology

  Award: 21102008
• IT
  Iran Telecommunication Research Center
• NS
  Natural Sciences and Engineering Research Council of Canada
• JS
  Japan Society for the Promotion of Science
• NI
  National Institute of Information and Communications Technology