INTRIQ Seminar

Nanoscale circuits in microwave cavities as a platform for sensing topological matter and engineering interactions between photons

Takis Kontos / Audrey Cottet

Laboratoire de Physique de l'École Normale Supérieure

Quantum dots in microwave cavities have emerged recently as a very interesting platform for quantum information processing in particular using the electronic spin. Microwave cavities are a priori also very interesting for quantum sensing of elusive states of matter or engineering quantum light. In this talk, we will illustrate these ideas by considering two complementary situations of mesoscopic circuits in a microwave cavity. In the first part of the talk, we will show how cavity photons can be used to probe synthetic spin textures which have emerged recently as a new path for engineering Majorana devices [1]. In particular, we show that an inhomogenous synthetic spin orbit interaction at the nanoscale can be engineered through cavity measurements. In the second part of the talk, we will show theoretically how to use a mesoscopic circuit to shape non-classical states of light in a cavity. We will focus specifically on mesoscopic circuit induced dissipative and non-dissipative photon-photon interactions.

[1] L.C. Contamin, M.M. Desjardins et al. Nature Materials 2019