Lecturer: Dr. Hashem Zoubi
Affiliation: Max-Planck Institute for the Physics
of Complex Systems
Abstract:
Since the introduction of the concept of exciton by
Ya. I. Frenkel in 1931 and it was successfully
applied to explain a wide spectrum of electrical
and optical properties in organic and inorganic
semiconductors. The recent progress in optical
lattice ultracold atoms opened the door to new
generation of experiments that suggest new
states of matter with completely controllable
parameters. We show that optical lattices in the
Mott insulator phase considered as artificial
crystals can simulate various puzzling effects in
solids. We introduce Frenkel like-excitons as
coherent states into such a system that can
appear via the delocalization of electronic
excitations induced by electrostatic interactions.
Excitons manifest various unique phenomena, e.g.
they allow for quantum engineering of their
lifetimes, where bright and dark excitons with
superradiant and metastable states are predicted,
and which can serve as quantum memory devices.
Furthermore, we suggest optical lattices as new
active materials for cavity QED. For resonant
exciton-photon in the strong coupling regime we
introduce cavity polaritons as natural collective
eigenstates. These concepts provide a non-
destructive observation tool for the system
different quantum phases through linear and
nonlinear optical processes. We investigated
several configurations with different geometry
and dimensionality that can realize our results.
[1] H. Zoubi, H. Ritsch, Phys. Rev. A 76, 13817
(2007).
[2] H. Zoubi, H. Ritsch, New J. Phys. 12, 103014
(2010).
[3] H. Zoubi, Europhys. Lett. 100, 24002 (2012).
[4] H. Zoubi, H. Ritsch, Adv. At. Mol. Opt. Phys. 62, 171 (2013).
[5] H. Zoubi, Phys. Rev. A 89, 043831 (2014).