Publication date: 8th June 2021
Coherent manipulation of quantum systems with precisely controlled electromagnetic fields is one of the key elements of quantum optics and quantum technologies. In this talk I will give an overview of our recent work [1], which theoretically demonstrates that the non-radiative electromagnetic near-field of a temporally modulated free-space electron beam can be utilized for coherent control (even on the nanoscale e.g. in an electron microscope) of quantum systems. I show that such manipulation can be performed with only classical control over the electron beam itself and that potential challenges like shot noise and decoherence through back action on the electrons are for certain parameter ranges insignificant for our approach. I will conclude with a possible experimental realization using laser cooled, state-selected potassium atoms and point out applications such as painted potentials, which could be realized using a spatially modulated electron beam.
[1] D. Rätzel, D. Hartley, O. Schwartz, and P. Haslinger, A Quantum Klystron -- Controlling Quantum Systems with Modulated Electron Beams, arXiv:2004.10168 (2020).
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