Sommaire:

The quest for efficient spin-photon interfaces is at the core of many proposals in quantum optics. On the one hand, it would allow developing deterministic spin-photon and photon-photon gates for quantum computing, as well as multi-entangled states with N photons, for quantum communications. On the other hand, it would allow implementing interesting fundamental studies on quantum measurement, whereby each photon can be used to « observe » the spin system.

In this seminar, I will briefly review some systems used for spin-photon coupling, and then focus on the recent progress made in C2N, using charged quantum dots in pillar-based cavities. I will show how we can use the same device as a quantum emitter – to emit several photons all entangled with the same spin, or as a quantum receiver – to allow exchanging the quantum information between a confined spin and the incoming photons.


Along the way, I will show how one can play with the polarization degree of freedom in various ways, to encode multi-photon entanglement as well as to extract information on the various processes occurring in our solid-state structures.

Finally, I will discuss some perspectives of our work, for the realization of optimized spin-photon interfaces and their use in various applications.

Pour plus d'informations, merci de contacter Finco A.