2:00 p.m.
Wednesday, April 16
Special Quantum Optics Seminar
Lyman 425, Harvard University
“Soft quantum matter for coherent coupling between electrons and photons”
Sanli Faez
Leiden Institute of Physics, The Netherlands
Abstract: The strong coupling of quantum emitters to a single mode waveguide is a powerful
alternative to cavity-QED for engineering complex quantum systems. In analogy, this
approach has been named waveguide-QED. The main advantage of this approach is its
scalability, i.e. to make a quantum network of many emitters via efficient coupling to a
single guided mode, while keeping a high degree of control on individual nodes. The main
experimental realizations so far have been based on trapped cold atoms inside or around
nano-fibers and superconducting quantum networks. These advances have inspired many
theoretical proposals in the last few years and have brought waveguide-QED to the
forefront of studying many-body quantum physics in photonic systems.
I report on the experimental realization of a new solid-state platform for waveguide-QED,
which uses organic molecules as quantum emitters. I report on the successful retrieval of
lifetime-limited molecular transitions in a nano-waveguide at temperatures around 2 K and
the measurement of high visibility and background-free resonant fluorescence of a single
molecule.
Because of their small size and abundance, organic molecules can be embedded in these
devices at the high concentrations that are essential for nanoscopy applications. I will
discuss how to use these organic molecules as nanoprobes for detection of single
conduction electrons in electronic devices such as molecule-nanoparticle networks. I will
also present a new proposal, based on this platform, for coherent coupling between
superconducting qubits and visible photons, which is essential for transferring their
quantum states over long distances.
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