Feasibility of free space quantum key distribution with coherent polarization states
D. Elser, T. Bartley, B. Heim, Ch. Wittmann, D. Sych, G. Leuchs
TL;DR
This paper demonstrates the practical feasibility of free space quantum key distribution using continuous variables and coherent polarization states over a 100-meter outdoor channel, enabling daylight operation and atmospheric fluctuation compensation.
Contribution
It presents the first experimental demonstration of free space QKD with continuous variables under real atmospheric conditions using a combined signal and local oscillator scheme.
Findings
Successful transmission over 100m free space channel
Auto-compensation of atmospheric fluctuations
Operation under daylight conditions
Abstract
We demonstrate for the first time the feasibility of free space quantum key distribution with continuous variables under real atmospheric conditions. More specifically, we transmit coherent polarization states over a 100m free space channel on the roof of our institute's building. In our scheme, signal and local oscillator are combined in a single spatial mode which auto-compensates atmospheric fluctuations and results in an excellent interference. Furthermore, the local oscillator acts as spatial and spectral filter thus allowing unrestrained daylight operation.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.