Dynamics of the Vortex-Particle Complexes Bound to the Free Surface of Superfluid Helium

Moroshkin, Peter; Leiderer, Paul; Kono, Kimitoshi; Inui, Sosuke; Tsubota, Makoto

doi:10.1103/physrevlett.122.174502

Cited by 15 publications

(7 citation statements)

References 34 publications

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“…45 This situation can arise both in bulk 46 and under a free surface of superfluid helium. 47 At a temperature of 1.6 K the viscosity of liquid helium is 1.3 Â 10 À6 Pa s. 48 Of course, for a realistic description of particle motion under such conditions, the 'particle-quantum vortex' interaction must be taken into account. 49 However, using our simple (non-quantum) formalism, we can estimate that the momentum relaxation time of such a particle with R = 10 mm can be t p = (2/9)R 2 r/Z B 20 ms and the inertial delay number b can be B10 5 .…”

Section: Discussionmentioning

confidence: 99%

Active Brownian particle in homogeneous media of different viscosities: numerical simulations

Лисин

Ваулина

Lisina

et al. 2021

Phys. Chem. Chem. Phys.

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Section: Discussionmentioning

confidence: 99%

Active Brownian particle in homogeneous media of different viscosities: numerical simulations

Лисин

Ваулина

Lisina

et al. 2021

Phys. Chem. Chem. Phys.

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“…The large heat capacity ensures that any nanomaterial injected into the superfluid helium is quickly cooled and thermalized. This enables exploring the unprecedented interactions between quantum fluids and classical nanomaterials and nanoscopic quantum hydrodynamic effects (1)(2)(3). A major obstacle in such approaches is the lack of experimental techniques to suspend/levitate the target nanoobject in quantum fluid, and controlling and probing the object motion precisely.…”

Section: Introductionmentioning

confidence: 99%

Optical trapping of nanoparticles in superfluid helium

Minowa,

Geng,

Kokado

et al. 2021

Preprint

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Optical tweezers, the three-dimensional confinement of a nanoparticle by a strongly focused beam of light, have been widely employed in investigating biomaterial nanomechanics, nanoscopic fluid properties, and ultrasensitive detections in various environments such as inside living cells, at gigapascal pressure, and under high vacuum. However, the cryogenic operation of solidstate-particle optical tweezers is poorly understood. In this study, we demonstrate the optical trapping of metallic and dielectric nanoparticles in superfluid helium below 2 K, which is two orders of magnitude lower than in the previous experiments. We prepare the nanoparticles via in-situ laser ablation.The nanoparticles are stably trapped with a single laser beam tightly focused in the superfluid helium. Our method provides a new approach for studying nanoscopic quantum hydrodynamic effects and interactions between quantum fluids and classical objects.Teaser Optical tweezers can grab nanoparticles at extremely low temperature (1.4 K), show-1

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“…A stunning example is the visualization of quantised vortex dynamics using frozen hydrogen particles [10,15]. However, although some reports have indicated that dense materials such as metallic or semiconducting nanowires are formed along the quantised vortex core [5,[16][17][18], the contribution of the quantised vortex remains controversial [5,12]. Herein, we provide direct experimental evidence of dense silicon nanoparticle attraction to the quantised vortex, and the stabilisation along the vortex core.…”

Section: Introductionmentioning

confidence: 88%

Visualisation of quantised vortex reconnection as enabled by laser ablation

Minowa,

Aoyagi,

Inui

et al. 2021

Preprint

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Impurity injection into superfluid helium is a simple yet unique method with diverse applications, including high-precision spectroscopy[1-3], quantum computing[4], nano/micro material synthesis [5,6], and flow visualisation [7]. Quantised vortices are believed to play a major role in the interaction between superfluid helium and light impurities [2,[8][9][10][11]. However, the basic principle governing the interaction is still controversial for dense materials such as semiconductor and metal impurities [5,12]. Herein, we provide experimental evidence of the attraction of the dense silicon nanoparticles to the quantised vortex cores. We prepared the silicon nanoparticles via insitu laser ablation. Following laser ablation, we observed that the silicon nanoparticles formed curved-filament-like structures, indicative of quantised vortex cores. We also observed that two accidentally intersecting quantised vortices exchanged their parts, a phenomenon called quantised vortex reconnection [13]. This behaviour closely matches the dynamical scaling of reconnections.Our results provide a new method for visualising and studying impurity-quantised vortex interactions.

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Dynamics of the Vortex-Particle Complexes Bound to the Free Surface of Superfluid Helium

Cited by 15 publications

References 34 publications

Active Brownian particle in homogeneous media of different viscosities: numerical simulations

Active Brownian particle in homogeneous media of different viscosities: numerical simulations

Optical trapping of nanoparticles in superfluid helium

Visualisation of quantised vortex reconnection as enabled by laser ablation

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