Research summary

General topic.— Our research area lies at the border between condensed matter and quantum optics and deals with quantum many-body open systems.

Systems.— Our investigations are strongly related to ongoing experiments in hybrid light-matter systems. So far the focus has been mainly on neutral atoms coupled to nanophotonics structures like optical waveguides or cavities, allowing to enhance and control light-matter interactions. Ongoing research also involves exciton polaritons in semiconductors coupled to microcavities.

Approach.— We develop non-equilibrium field-theoretical approaches tailored for the study of many-body phenomena in the above open quantum systems. These approaches are novel in the context of quantum optics and non-trivially extend methods typically used in condensed matter.

Goals.— We are interested in fundamental theoretical problems in many-body physics like collective phenomena and non-equilibrium phases. However, since our techniques are quantitatively reliable, we also concretely investigate hybrid light-matter devices for quantum technologies, so far in the context ultraprecise metrology/sensing, with ongoing efforts in quantum nonlinear photon devices.


Out-of-equilibrium quantum crystals

The strong long-range interactions intrinsic to these hybrid atom-photon systems can induce spontaneous crystallization phenomena, with additional peculiarities arising from the driven-dissipative nature.




Steady-states & dynamics of driven-dissipative systems with long-range interactions

The strong long-range interactions combined with drive and dissipation can give rise to non-equilibrium steady-states, novel dynamical phase transitions, as well as peculiar quench dynamics.



Topological self-ordered states

The light field strongly coupled to the neutral atoms can work as an artificial dynamical gauge field for the matter, giving rise for instance to exotic topological states.