Direct visualization of coherently delocalized excitons in molecular aggregates


Abilities to identify, control, characterize and track evolution of entangled quantum states are at the essence of quantum computing. Excitonic states of organic dyes suitably arranged into aggregates are a prominent example of coherent delocalization and quantum entanglement. We aim to directly address the emerging quantum phenomena in designed 2D excitonic clusters - gates - built by physically- or chemically-driven assembly processes or by molecular manipulation. We can resolve photon spectra spatially on subnanometer scale and temporally with picosecond resolution employing the newest type of spectromicroscopy. Through integration of photon, electron and atomic force detection on a single platform, under ultra-high vacuum and cryogenic temperatures, we can obtain the aggregate geometries, their photon maps and electronic structures. Ab-initio calculations will support the experimental findings and a software will be specifically developed to simulate the photon maps in order to bridge experiments with theory and to design proof-of-concept quantum gates formed with dye molecules.