Coherent states of light and ordered states of matter in cavity QED
14:00 - 15:00
École Polytechnique, Paris
CFEL (Bldg. 99)
Seminar Room IV, O1.111
Collective phenomena originating from interactions between light and matter have become a major focus of interest spanning different fields of research.
By allowing the creation of entangled quantum states of light and
collective matter excitations, cavity quantum electrodynamics offers a
fascinating platform in this context. Intriguing phenomena are expected
when ordered phase of matter are strongly coupled with vacuum
fluctuations of the electromagnetic fields in a cavity. In this talk I
will review my recent research activity along this direction focusing,
in particular, on the simultaneous appearance of coherent states of
light in the cavity field and condensation of excitons in the material.
The formation of coherent states in the cavity field is usually known as
photon superradiance, while condensation of excitons can be realised in
the so called excitonic insulators materials. I will characterize this
"superradiant excitonic insulator" (SXI) phase discussing probes by
coupling with external fields bringing the system out of equilibrium as
well as possible realisations in real materials.