Abstract
A 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 that "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.
| Original language | English |
|---|---|
| Article number | 014056 |
| Journal | Physical Review Applied |
| Volume | 21 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 2024 |
Funding
Funding for this work was provided by the U.S. Department of Energy, Office of Cybersecurity, Energy Security, and Emergency Response (CESER) through the Risk Management Tools and Technologies (RMT) Program. This manuscript has been co-authored by employees of Brookhaven Science Associates, LLC under Contract No. DE-SC0012704 with the U.S. Department of Energy. The U.S. Government retains, and the publisher, by accepting the article for publication, acknowledges that the U.S. Government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript or allow others to do so for U.S. Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan .