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Quantum Code Division Multiple Access Based Continuous-variable Quantum Key Distribution by Ali, Shahnoor; Kundu, Neel Kanth is a scholarly article available to read on EtoBox.

What is Quantum Code Division Multiple Access Based Continuous-variable Quantum Key Distribution about?

In this paper, we propose a quantum code division multiple access (q-CDMA) based continuous-variable quantum key distribution (CV-QKD) system. In the proposed system, the quantum states of two senders ($\text{Alice}_{1,2}$) are chaotically encoded through chaotic phase shifters and then transmitted over a quantum channel. At the receiver, the quantum states are decoded via chaos synchronization to separate the quantum states sent by the different senders and received by the two receivers ($\text{Bob}_{1,2}$) separately. We characterize the input-output relation of the quadrature between the two senders and receivers and then analyze the secret key rate (SKR) of the q-CDMA-based CV-QKD system. Our numerical results reveal that the q-CDMA approach can significantly enhance the SKR for both users when compared to the single-user case without the q-CDMA approach.

Author

Ali, Shahnoor; Kundu, Neel Kanth

Published

2025

Language

EN