Direct observation of roton emission from a single quantized vortex in superfluid 4He, with energy loss per cycle matching the roton gap energy and establishing it as the primary zero-temperature dissipation channel.
The VS ⊥Γ event corresponds to a Γ-shaped con- figuration,i.e., a single vortex branch connects the nanobeam to the substrate
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Observation of roton emission from a quantized vortex
Direct observation of roton emission from a single quantized vortex in superfluid 4He, with energy loss per cycle matching the roton gap energy and establishing it as the primary zero-temperature dissipation channel.