Seminar: Matteo Pasini

Tin-Vacancy centres and diamond nanophotonics: towards a new generation of quantum network nodes

Obtaining efficient and scalable generation of entanglement between distant quantum systems is a challenge that has to be tackled towards the realisation of a quantum network. To this end, a key enabling step is the enhancement of the coherent interaction between photonic quantum information carriers and spins used as stationary qubits.
Colour centres in diamond are promising candidates for the realisation of quantum network nodes, thanks to their good optical and spin coherence properties. The tin-vacancy (SnV) centre recently emerged as a resourceful platform thanks to its excellent optical properties, the secondlong relaxation times expected around 1K and compatibility with nanophotonic integrated devices, thanks to the first-order insensitivity to electric field fluctuations. Together with the recent developments in alldiamond nanofabrication and hybrid integrated photonics, this makes the SnV interesting for realising scalable platforms and on-chip devices with strong spin-photon interaction.
This talk will introduce quantum networks and focus on our work towards realising an efficient spin-photon interface based on SnV centres integrated in diamond nanophotonic waveguides, with the goal of using it as building block for quantum network applications.

Matteo Pasini is a PhD researcher in the group of prof. Ronald Hanson in QuTech (Delft University of Technology), where he’s working on experimental quantum optics with colour centres in diamond. His interest starts in quantum photonics and integrated optics, and expands to the technical and fundamental challenges of controlling and connecting basic quantum systems.