Cavity-mediated long-range interactions between spins and Fermions

Jean-Philippe Brantut
EPF Lausanne, Switzerland

Cavity quantum electrodynamics allows for the collective coupling of a many-body system to a single mode of the electromagnetic field. The coupling allows for the cavity photons to mediate a collective interaction between all the constituents of the system, leading to a wealth of possibilities for quantum simulations. I will describe two experiments exploiting this interaction to explore (i) magnetism and localization in a spin ensemble where the cavity mediated interaction competes with disorder, and (ii) superfluidity and density wave order in an interacting Fermi gas with strong short and long-range interactions.