Detector-device-independent quantum key distribution

Journal Article · Mon Dec 01 04:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4903350· OSTI ID:22402386

Lim, Charles Ci Wen; Korzh, Boris; Martin, Anthony; Bussières, Félix; Thew, Rob; Zbinden, Hugo ^[1]

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1. Group of Applied Physics, University of Geneva, Chemin de Pinchat 22, CH-1211 Geneva 4 (Switzerland)

Recently, a quantum key distribution (QKD) scheme based on entanglement swapping, called measurement-device-independent QKD (mdiQKD), was proposed to bypass all measurement side-channel attacks. While mdiQKD is conceptually elegant and offers a supreme level of security, the experimental complexity is challenging for practical systems. For instance, it requires interference between two widely separated independent single-photon sources, and the secret key rates are dependent on detecting two photons—one from each source. Here, we demonstrate a proof-of-principle experiment of a QKD scheme that removes the need for a two-photon system and instead uses the idea of a two-qubit single-photon to significantly simplify the implementation and improve the efficiency of mdiQKD in several aspects.

• OSTI ID: 22402386
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 22 Vol. 105; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
EFFICIENCY
INTERFERENCE
PHOTONS
QUANTUM ENTANGLEMENT
QUBITS