Field test of continuous-variable quantum key distribution with a true local oscillator
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.
- Publication:
-
Physical Review Applied
- Pub Date:
- January 2024
- DOI:
- 10.1103/PhysRevApplied.21.014056
- arXiv:
- arXiv:2309.03959
- Bibcode:
- 2024PhRvP..21a4056W
- Keywords:
-
- Quantum Physics
- E-Print:
- Physical Review Applied 21 (1), 014056 (2024)