General seminar by François DUBIN

General seminar by François DUBIN, CRHEA – CNRS and University Côte d’Azur, on Thursday 30 January 2025 at 11:00am in the Auditorium of the Institut d'Optique Graduate School in Palaiseau, on the topic: "Coherent quantum solids of dipolar excitons in sub-wavelength lattices."

Abstract: "The Bose-Hubbard (BH) Hamiltonian constitutes one pillar of condensed-matter theory. It specifically describes the collective quantum phases accessible to strongly correlated bosons confined in lattice potentials. Here, we present a semiconductor technology to emulate BH models with spatially extended correlations. By relying on semiconductor excitons, i.e. Coulomb-bound electron-hole pairs, extended Bose-Hubbard Hamiltonians are implemented in sub-wavelength period lattices where interactions are ruled by longitudinal and transverse components of the electromagnetic radiation. These respectively yield dipolar repulsions extending to nearest neighbors, and power-law hoping in the lattice. Harnessing these two channels coherent quantum insulators are prepared dissipatively with high purity across around 10x10 sites, namely at unity and half lattice fillings coherent Mott and checkerboard solids."