Dynamical Backaction Cooling with Free Electrons

The ability to cool single ions, atomic ensembles, and more recently macroscopic degrees of freedom down to the quantum groundstate has generated considerable progress and perspectives in Basic and Technological Science. These major advances have been essentially obtained by coupling mechanical motion to a resonant electromagnetic degree of freedom in what is generally known as laser cooling. In this work, we experimentally demonstrate the first self-induced coherent cooling mechanism that is not mediated by the electromagnetic field. Using a focused electron beam, we report a 50-fold reduction of the motional temperature of a nanowire. Our result primarily relies on the sub-nanometer confinement of the electron beam and generalizes to any delayed and topologically confined interaction, with important consequences for near-field microscopy and fundamental nanoscale dissipation mechanisms.Comment: 8 pages, 4 figure

Electrostatic interactions between ions near Thomas–Fermi substrates and the surface energy of ionic crystals at imperfect metals

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Nanoscale capillary freezing of ionic liquids confined between metallic interfaces and the role of electronic screening

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Nanorheology of Interfacial Water during Ice Gliding

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Nanorheology of Interfacial Water during Ice Gliding

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