2015 Spring Graduate Colloquium Series: Brian Ko

DateMarch 20, 2015
Time3:35 - 5:00 pm
LocationBaylor Sciences Building, Room E.125
Brian Ko

Secure and Practical Long-Distance Quantum-Key
Distribution using Standard Telecom Components

Since its proposal in 1984, quantum key distribution (QKD) has experienced great growth in both theory and practice. However, application of long-distance quantum key distribution (QKD) has been hindered by the use of cryogenically cooled superconducting nanowire single photon detectors (SNSPDs) to obtain low noise and inefficient security analyses that ignore corrections from the infinite limit. In this paper, using a novel finite-key security analysis that takes more parameters into account as well as advancements in InGaAs/InP SPDs that allow it to rival the dark count rates of SNSPDs in the free-running regime (200K), secure and practical QKD can be achieved over 300 km using standard
telecom components.

DOI: 10.1038/nphoton.2014.327

For more information, please contact: Dr. Ken Park 254-710-2282

PublisherDepartment of Physics
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