Efficient time-bin encoding for practical high-dimensional quantum key
distribution
- URL: http://arxiv.org/abs/2004.03498v1
- Date: Tue, 7 Apr 2020 15:51:29 GMT
- Title: Efficient time-bin encoding for practical high-dimensional quantum key
distribution
- Authors: I. Vagniluca, B. Da Lio, D. Rusca, D. Cozzolino, Y. Ding, H. Zbinden,
A. Zavatta, L. K. Oxenl{\o}we and D. Bacco
- Abstract summary: High-dimensional quantum key distribution (QKD) allows to achieve information-theoretic secure communications.
We present a novel scheme for fiber-based 4-dimensional QKD, with time and phase encoding and one-decoy state technique.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: High-dimensional quantum key distribution (QKD) allows to achieve
information-theoretic secure communications, providing high key generation
rates which cannot in principle be obtained by QKD protocols with binary
encoding. Nonetheless, the amount of experimental resources needed increases as
the quantum states to be detected belong to a larger Hilbert space, thus
raising the costs of practical high-dimensional systems. Here, we present a
novel scheme for fiber-based 4-dimensional QKD, with time and phase encoding
and one-decoy state technique. Quantum states transmission is tested over
different channel lengths up to 145 km of standard single-mode fiber,
evaluating the enhancement of the secret key rate in comparison to the
three-state 2-dimensional BB84 protocol, which is tested with the same
experimental setup. Our scheme allows to measure the 4-dimensional states with
a simplified and compact receiver, where only two single-photon detectors are
necessary, thus making it a cost-effective solution for practical and
fiber-based QKD.
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