Finite-key analysis of high-dimensional time–energy entanglement-based quantum key distribution
Author(s)Lee, Catherine; Mower, Jacob; Zhang, Zheshen; Englund, Dirk R.; Shapiro, Jeffrey H
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We present a security analysis against collective attacks for a time–energy entanglement-based quantum key distribution protocol, given the practical constraints of single-photon detector efficiency, channel loss, and finite-key considerations. We find a positive secure-key capacity when the key length increases beyond 10[superscript 4] for eight-dimensional systems. The minimum key length required is reduced by the ability to post-select on coincident single-photon detection events. Including finite-key effects, we show the ability to establish a shared secret key over a 200 km fiber link.
DepartmentMassachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Research Laboratory of Electronics
Quantum Information Processing
Lee, Catherine, Jacob Mower, Zheshen Zhang, Jeffrey H. Shapiro, and Dirk Englund. “Finite-Key Analysis of High-Dimensional Time–energy Entanglement-Based Quantum Key Distribution.” Quantum Information Processing 14, no. 3 (January 7, 2015): 1005–1015.
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