Microscopic dynamics of quantized vortices in turbulent superfluid in the T=0 limit
Lead Research Organisation:
Lancaster University
Department Name: Physics
Abstract
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Publications
Autti S
(2020)
Effect of the boundary condition on the Kapitza resistance between superfluid He 3 - B and sintered metal
in Physical Review B
Barenghi C
(2023)
Vinen's Energy Barrier
in Journal of Low Temperature Physics
Golokolenov I
(2021)
On the origin of the controversial electrostatic field effect in superconductors.
in Nature communications
Guthrie A
(2021)
Nanoscale real-time detection of quantum vortices at millikelvin temperatures
in Nature Communications
Guénault A
(2023)
A low-frequency, high-amplitude, torsional oscillator for studies of quantum fluids and solids
in Physics of Fluids
Guénault A
(2019)
Acoustic damping of quartz tuning forks in normal and superfluid He 3
in Physical Review B
McClintock P V E
(2022)
A low-frequency, high-amplitude, torsional oscillator for turbulence studies in quantum fluids
in arXiv - Cond. Mat.
Olusola O
(2020)
Quantum vibrational resonance in a dual-frequency-driven Tietz-Hua quantum well
in Physical Review E
Omoteso K
(2022)
Delay-induced vibrational resonance in the Rayleigh-Plesset bubble oscillator
in Journal of Physics A: Mathematical and Theoretical
Omoteso KA
(2021)
Acoustic vibrational resonance in a Rayleigh-Plesset bubble oscillator.
in Ultrasonics sonochemistry
Oyeleke K
(2022)
Novel bursting oscillations in a nonlinear gyroscope oscillator
in Physica Scripta
Schmoranzer D
(2019)
Dynamical similarity and instabilities in high-Stokes-number oscillatory flows of superfluid helium
in Physical Review B
Siddiq H
(2023)
Visualization of oscillatory electron dynamics on the surface of liquid helium
in Physical Review B
Description | We have demonstrated the feasibility of creating a low-frequency oscillator to investigate dissipation and the creation of quantum vortices in superfluid He-4. We have discovered that the critical velocity for the creation of quantum turbulence is apparently much higher than anybody expected, given the high oscillator velocities that we are now achieving. However, further tests are needed in order to be sure. We intend to repeat the experiments using a cell with rougher surfaces while, at the same time, and to explore the effect of injecting quantum turbulence from a tuning fork. As things stand, the most likely explanation of the observations is that quantum vortices de-pin from the walls of the cell as the temperature falls into the millikelvin range. There have been indications of this possibility from the results of other very different kinds of experiments published over the last few years. This very important result will be followed up and further investigated under a new grant that started in January 2023. |
Exploitation Route | Other people working on quantum fluids and solids are likely to find our new oscillator design useful, and we currently have a detailed paper in review. |
Sectors | Aerospace Defence and Marine Energy Other |
URL | https://arxiv.org/pdf/2201.08503v1.pdf |
Description | Creation and evolution of quantum turbulence in novel geometries |
Amount | £1,277,686 (GBP) |
Funding ID | EP/X004597/1 |
Organisation | Engineering and Physical Sciences Research Council (EPSRC) |
Sector | Public |
Country | United Kingdom |
Start | 01/2023 |
End | 01/2027 |
Description | Project IN-QUEST: Innovative Quantum-Enabling Sub-Kelvin Technology |
Amount | £352,651 (GBP) |
Funding ID | 133988 |
Organisation | Innovate UK |
Sector | Public |
Country | United Kingdom |
Start | 03/2020 |
End | 11/2021 |
Description | Quantum Enhanced Superfluid Technologies for Dark Matter and Cosmology |
Amount | £1,272,336 (GBP) |
Funding ID | ST/T006773/1 |
Organisation | Science and Technologies Facilities Council (STFC) |
Sector | Public |
Country | United Kingdom |
Start | 12/2020 |
End | 04/2025 |
Title | High amplitude cryogenic oscillator |
Description | We are developing a novel kind of low-frequency torsion oscillator. It incorporates a Be-Cu torsion rod and a body made of Araldite. Because of being very light, the resonant frequency is relatively low at around 74 Hz and therefore suitable for our experiments on vortex creation in superfluid He-4. Unusually, the driving electrodes are circular and planar enabling the oscillator to be driven to amplitudes almost an order of magnitude higher than conventional torsion oscillators without being short-circuited by direct touches. The prototype is working well, and has been tested: at room temperature, in air and in vacuum; at 77K in vacuum; and down to about 10 mK in vacuum and in superfluid He-4. The preliminary measurements strongly suggest that remanent quantum vortices de-pin from the inner walls of the oscillator at mK temperatures. This is potentially a very important result and it is currently being checked and analysed. Prior to publication of a full paper on the subject, we have published an arXiv preprint to make our new tool available to other scientists. |
Type Of Material | Improvements to research infrastructure |
Year Produced | 2022 |
Provided To Others? | Yes |
Impact | None yet. |
URL | https://arxiv.org/abs/2201.08503 |
Title | Low-frequency, high-amplitude, torsional oscillator |
Description | We have introduced a low-frequency torsional oscillator suitable for studies of quantum fluids and solids. It operates at frequencies of about 100 Hz, achieves velocities of several cm/s, and exhibits a quality factor Q of about 30,000. In order to reach such velocities at this relatively low frequency, the oscillator amplitude must exceed 100 micrometres, which would be impracticable for a conventional capacitor-driven device where the drive is applied parallel to the main motion and there are correspondingly large changes in the separation of the capacitor plates. For the different geometry of our new oscillator, however, the separations of both the drive and detect capacitor plates remain constant regardless of the amplitude of oscillation. |
Type Of Material | Improvements to research infrastructure |
Year Produced | 2023 |
Provided To Others? | Yes |
Impact | The impact lies in the future. We intend to be the first to exploit this new device for our studies of quantum turbulence in superfluid He-4 under the present EPSRC grant. |
Description | David Schmoranzer, Charles University, Prague |
Organisation | Charles University |
Country | Czech Republic |
Sector | Academic/University |
PI Contribution | We have done most of the experimental work at Lancaster, involving the development of a new kind of "pill-box" oscillator containg superfluid He-4 at mK temperatures. |
Collaborator Contribution | David Schmoranzer has carried out calculations and developed models, and has also contributed to the experimental measurements during his visits to Lancaster. |
Impact | Joint scientific papers, as listed under Publications. |
Start Year | 2017 |
Title | Torsional oscillator |
Description | We are developing a novel kind of low-frequency torsion oscillator. It incorporates a Be-Cu torsion rod and a body made of Araldite. Despite being very light as a result, the resonant frequency is relatively low at around 74 Hz. Unusually, the driving electrodes are circular, enabling the oscillator to be driven to amplitudes almost an order of magnitude higher than conventional torsion oscillators without being short-circuited by direct touches. The prototype is working well, but we have yet to test it in a vacuum or under cryogenic conditions. Although designed specifically for our project on dissipation and vortex creation in superfluid helium, it is clear that a very sensitive pressure gauge could be developed from the same technology. |
Type Of Technology | Detection Devices |
Year Produced | 2018 |
Impact | It is too soon for impacts. |
Description | Obituary For W F Vinen FRS |
Form Of Engagement Activity | A magazine, newsletter or online publication |
Part Of Official Scheme? | No |
Geographic Reach | International |
Primary Audience | Professional Practitioners |
Results and Impact | An obituary of Professor W F ("Joe") Vinen FRS. He played a major role in UK Physics (including chairing the SRC Physics Committee) and Physics internationally, and was a Co-I on the grant proposal. The obituary summarises his contribution. |
Year(s) Of Engagement Activity | 2022 |
Description | Obituary for Professor P S Landa |
Form Of Engagement Activity | A magazine, newsletter or online publication |
Part Of Official Scheme? | No |
Geographic Reach | International |
Primary Audience | Professional Practitioners |
Results and Impact | An obituary for Professor Polina S Landa, who was a major player in Soviet science. It will have alerted a much wider range of scientists and engineers to her contributions than those working directly in her field of stochastic nonlinear dynamics and turbulence. |
Year(s) Of Engagement Activity | 2022 |