Speaker
Description
Light-matter platforms are fundamental for a variety of applications in quantum information
processing, among others [1].
At the level of pure electronic systems coupled solely to light, such as in the case of
structured subwavelength arrays of quantum emitters trapped in optical lattices, I will
describe the emergence of cooperative behavior: the optical response can be efficiently
enhanced by controlling the hopping of surface excitations via the quantum electromagnetic
vacuum induced dipole-dipole interactions.
I will then move to the case of single quantum emitters embedded in solid state platforms.
Such emitters, when used in quantum sensing or as qubits, strongly suffer from decay and
decoherence induced by their intrinsic complexity, such as is the case for molecules, where
the electron is coupled to nuclear vibrations, or by their coupling to crystal phonons, as is the
case for vacancy centers, quantum dots etc. I will provide a simple theoretical introduction of
electron-vibron coupling [2] and discuss the physics on non-radiative relaxation brought on
by non-adiabatic effects. This is aimed at understanding the limitations for the quantum
efficiency of solid state based quantum emitters.
[1] M. Reitz, C. Sommer, and C. Genes, Cooperative Quantum Phenomena in Light-Matter
Platforms, PRX Quantum 3, 010201 (2022).
[2] M. Reitz, C. Sommer and C. Genes, Langevin approach to quantum optics with
molecules, Phys. Rev. Lett. 122, 203602 (2019).