A quantum interface between NV center matter qubits and Thulium rare-earth ion quantum memory compatible light

Description

Quantum networks, connecting quantum devices over large distances, promise to enable a range of new applications ranging from secure communication to fundamentally new kinds of computation. However, the individual components of (future) quantum networks may be realized with different kinds of physical systems, requiring specialized interfaces between these systems. Here we will present our work on interfacing a diamond Nitrogen Vacancy (NV) center, well suited as a local quantum processing network node [1], with light compatible with Tm-based rare-earth ion quantum memories, well suitable for long-range quantum repeaters [2].

To this end we demonstrate two-photon quantum interference between photons emitted from an NV center with weak coherent light resonant with a Tm-based memory, probing the indistinguishability of the photons created by these disparate sources. Furthermore, we present latest results on teleporting memory-compatible time-bin qubits into the spin-state of the NV center. With this quantum interface between different physical systems, we aim to bridge the gap between two key network components, an important step towards future quantum networks.

[1] Hermans, S.L.N. et al. Nature 605 (2022)
[2] Davidson J.H. et al. Phys. Rev. A 101 (2020)

Period	19 Oct 2023
Event title	European Quantum Technologies Conference 2023
Event type	Conference
Location	Hannover, GermanyShow on map
Degree of Recognition	International