Final published version
Research output: Contribution to Journal/Magazine › Meeting abstract › peer-review
Research output: Contribution to Journal/Magazine › Meeting abstract › peer-review
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TY - JOUR
T1 - Non-linear Dynamics of the Trapped Quantum Vortex
AU - Depellette, Joe
AU - Hayward, Callum
AU - Guthrie, Andrew
AU - Kafanov, Sergey
AU - Morrison, Nathaniel
AU - Noble, Mark
AU - Pashkin, Yuri
AU - Pickett, George
AU - Tsepelin, Viktor
PY - 2019/3/31
Y1 - 2019/3/31
N2 - Nanomechanical resonators have recently been studied as high-sensitivity probes of fluid dynamics in superfluid helium. When turbulence is introduced to such a system, quantum vortices may form and become trapped by the resonator, either completely surrounding the oscillating beam (a fully trapped vortex) or surrounding only part of it (a partially trapped vortex). Fully trapped vortices have been studied using the model of a linear harmonic oscillator behaviour with great success. However, in the presence of a partially trapped vortex, the oscillators have been found to behave non-linearly. We analysed the non-linear response of a doubly clamped nanobeam resonator submerged in helium-4 at 10 mK in the presence of a partially trapped vortex. Our analysis demonstrates that the observed non-linearities are caused by the dynamics of the vortex line. N. M. acknowledges the financial support of the US-UK Fulbright Program.
AB - Nanomechanical resonators have recently been studied as high-sensitivity probes of fluid dynamics in superfluid helium. When turbulence is introduced to such a system, quantum vortices may form and become trapped by the resonator, either completely surrounding the oscillating beam (a fully trapped vortex) or surrounding only part of it (a partially trapped vortex). Fully trapped vortices have been studied using the model of a linear harmonic oscillator behaviour with great success. However, in the presence of a partially trapped vortex, the oscillators have been found to behave non-linearly. We analysed the non-linear response of a doubly clamped nanobeam resonator submerged in helium-4 at 10 mK in the presence of a partially trapped vortex. Our analysis demonstrates that the observed non-linearities are caused by the dynamics of the vortex line. N. M. acknowledges the financial support of the US-UK Fulbright Program.
M3 - Meeting abstract
JO - APS March Meeting 2021
JF - APS March Meeting 2021
M1 - C44.014
ER -