Coherent frequency-down-conversion interface for quantum repeaters
No\'e Curtz, Rob Thew, Christoph Simon, Nicolas Gisin, and Hugo, Zbinden
TL;DR
This paper demonstrates a coherence-preserving photon frequency down-conversion process using difference-frequency generation in a waveguide, maintaining high phase coherence for quantum repeater applications.
Contribution
It introduces a novel, coherence-preserving frequency conversion interface suitable for quantum networks, with high interference visibility at the single-photon level.
Findings
Achieved >96% interference visibility after frequency conversion
Demonstrated coherence preservation at the single-photon level
Potential application in quantum repeater hybrid networks
Abstract
We report a coherence-preserving photon frequency down-conversion experiment based on difference-frequency generation in a periodically poled Lithium niobate waveguide, at the single-photon level. The coherence of the process has been demonstrated by measuring the phase coherence of pseudo single-photon time-bin qubits after frequency conversion with an interference visibility of > 96 %. This interface could be of interest for quantum repeater based hybrid networks.
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.