Continuous-variable quantum key distribution field-test with true local oscillator

• URL: http://arxiv.org/abs/2309.03959v2
• Date: Thu, 14 Dec 2023 19:32:01 GMT
• Title: Continuous-variable quantum key distribution field-test with true local oscillator
• Authors: Brian P. Williams, Bing Qi, Muneer Alshowkan, Philip G. Evans, and Nicholas A. Peters
• Abstract summary: Continuous-variable quantum key distribution (CV-QKD) has been proposed to remove any possibility of side-channel attacks. This is the first demonstration of CV-QKD with a receiver-based true LO over a deployed fiber network.
• Score: 0.7528223370654119
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Continuous-variable quantum key distribution (CV-QKD) using a true local (located at the receiver) oscillator (LO) has been proposed to remove any possibility of side-channel attacks associated with transmission of the LO as well as reduce the cross-pulse contamination. Here we report an implementation of true LO CV-QKD using "off-the-shelf" components and conduct QKD experiments using the fiber optical network at Oak Ridge National Laboratory. A phase reference and quantum signal are time multiplexed and then wavelength division multiplexed with the classical communications which "coexist" with each other on a single optical network fiber. This is the first demonstration of CV-QKD with a receiver-based true LO over a deployed fiber network, a crucial step for its application in real-world situations.

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