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Quantum Information Processing

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01-12-2015

Measurement-device-independent quantum key distribution with q-plate

Authors: Dong Chen, Zhao Shang-Hong, Sun Ying

Published in: Quantum Information Processing | Issue 12/2015

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Abstract

The original measurement-device-independent quantum key distribution is reviewed and a modified protocol using rotation invariant photonic state is proposed. A hybrid encoding approach combined polarization qubit with orbit angular momentum qubit is adopted to overcome the polarization misalignment associated with random rotations in long-distance quantum key distribution. The initial encoding and final decoding of information in our MDI-QKD implementation protocol can be conveniently performed in the polarization space, while the transmission is done in the rotation invariant hybrid space. Our analysis indicates that both the secure key rate and transmission distance can be improved with our modified protocol owing to the lower quantum bit error rate. Furthermore, our hybrid encoding approach only needs to insert four q-plates in practical experiment and to overcome the polarization misalignment problem mentioned above without including any feedback control.

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Title: Measurement-device-independent quantum key distribution with q-plate
Authors: Dong Chen
Zhao Shang-Hong
Sun Ying
Publication date: 01-12-2015
Publisher: Springer US
Published in: Quantum Information Processing / Issue 12/2015
Print ISSN: 1570-0755
Electronic ISSN: 1573-1332
DOI: https://doi.org/10.1007/s11128-015-1147-1

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