Nonlinear improvement of measurement-device-independent quantum key distribution using multimode quantum memory

نویسندگان

چکیده

This paper proposes a quantum key distribution (QKD) scheme for measurement-device-independent QKD (MDI-QKD) utilizing memory (QM), which is based on two distinct functions of QM: on-demand storage and multimode storage. We demonstrate nonlinear increase in the secure rate due to utilization QM. In protocol incorporating storage, it acknowledged that scaled by $R=O(\sqrt{\eta_{ch}})$ as $\eta_{ch}$, while an alternative approach, we reveal improvement $O(m_s^2)$, with $m_s$ being number modes frequency (spatial) multiplexing adopt atomic comb QM incorporates propose architecture MDI-QKD attain experimental feasibility. can be extended repeaters, even single quantum-repeater node, there enhancement incentive modes.

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ژورنال

عنوان ژورنال: Applied Physics B

سال: 2023

ISSN: ['1432-0649', '0946-2171']

DOI: https://doi.org/10.1007/s00340-023-08063-2