228 citations · 686 across the 38 of their papers we have counts for
18 papers · 1 filter
Magnetic Confinement of a Bubble of Supercooled He-A
Luke Whitehead, Andrew Casey, Richard P. Haley +9
We have designed and constructed a magnet surrounding a cylindrical volume of superfluid helium-3 to isolate a region of metastable, supercooled A-phase, entirely surrounded by bul…
QUEST-DMC: Background Modelling and Resulting Heat Deposit for a Superfluid Helium-3 Bolometer
S. Autti, A. Casey, N. Eng +21
We report the results of radioactivity assays and heat leak calculations for a range of common cryogenic materials, considered for use in the QUEST-DMC superfluid 3He dark matter d…
Transport of bound quasiparticle states in a two-dimensional boundary superfluid
S. Autti, R. P. Haley, A. Jennings +8
The B phase of superfluid 3He can be cooled into the pure superfluid regime, where the thermal quasiparticle density is negligible. The bulk superfluid is surrounded by a quantum w…
A low-frequency, high-amplitude, torsional oscillator for turbulence studies in quantum fluids
A. M. Gu'enault, P. V. E. McClintock, M. Poole +5
We describe a new type of torsional oscillator, suitable for studies of quantum fluids at frequencies of Hz, but capable of reaching high velocities of up to several c…
Visualization of Oscillatory Electron Dynamics on the Surface of Liquid Helium
Hala Siddiq, Kostyantyn Nasyedkin, Kimitoshi Kono +4
We have measured signals induced in 5 Corbino electrodes by spontaneous oscillations of 2D surface electrons on liquid helium at 0.3\,K, with a perpendicular magnetic field a…
Effect of boundary condition on Kapitza resistance between superfluid He-B and sintered metal
S. Autti, A. M. Guénault, R. P. Haley +7
Understanding the temperature dependence of thermal boundary resistance, or Kapitza resistance, between liquid helium and sintered metal has posed a problem in low temperature phys…
Fundamental dissipation due to bound fermions in the zero-temperature limit
S. Autti, R. P. Haley, A. Jennings +7
The ground state of a fermionic condensate is well protected against perturbations in the presence of an isotropic gap. Regions of gap suppression, surfaces and vortex cores which…
Multimode probing of superfluid by tuning forks
A. Guthrie, R. P. Haley, A. Jennings +9
Flexural mode vibrations of miniature piezoelectric tuning forks (TF) are known to be highly sensitive to superfluid excitations and quantum turbulence in and $\mat…
Orbitropic Effect in Superfluid He B-phase boundaries
M. Arrayás, R. Haley, G. R. Pickett +1
In this work we study the influence of orbital viscosity on the dynamics of the order parameter texture in the superfluid B-phase of He near a moving bounda ry. Based on the re…
Breaking the superfluid speed limit
D. I. Bradley, S. N. Fisher, A. M. Guénault +7
Coherent condensates appear as emergent phenomena in many systems, sharing the characteristic feature of an energy gap separating the lowest excitations from the condensate ground…
No Effect of Steady Rotation on Solid He in a Torsional Oscillator
M. J. Fear, P. M. Walmsley, D. E. Zmeev +2
We have measured the response of a torsional oscillator containing polycrystalline hcp solid He to applied steady rotation in an attempt to verify the observations of several…
Reconnections of quantized vortex rings in superfluid He at very low temperatures
P. M. Walmsley, P. A. Tompsett, D. E. Zmeev +1
Collisions in a beam of unidirectional quantized vortex rings of nearly identical radii in superfluid He in the limit of zero temperature (0.05 K) were studied using time-o…
Dynamics of quantum turbulence of different spectra
P. M. Walmsley, D. E. Zmeev, F. Pakpour +1
Turbulence in a superfluid in the zero temperature limit consists of a dynamic tangle of quantized vortex filaments. Different types of turbulence are possible depending on the lev…
Excimers He2* as Tracers of Quantum Turbulence in 4He in the T=0 Limit
D. E. Zmeev, F. Pakpour, P. M. Walmsley +7
We have studied the interaction of metastable He excimer molecules with quantized vortices in superfluid He in the zero temperature limit. The vortices were generated…
Observation of Crossover from Ballistic to Diffusion Regime for Excimer Molecules in Superfluid He
D. E. Zmeev, F. Papkour, P. M. Walmsley +7
We have measured the temperature dependence of the time of flight of helium excimer molecules He2* in superfluid 4He and find that the molecules behave ballistically below 100mK an…
Simultaneous Measurements of the Torsional Oscillator Anomaly and Thermal Conductivity in Solid 4He
D. E. Zmeev, A. I. Golov
In these torsional oscillator experiments the samples of solid He were characterized by measuring their thermal conducitvity. Polycrystalline samples of helium of either high i…
Vortex core contribution to textural energy in 3He-B below 0.4Tc
V. B. Eltsov, R. de Graaf, M. Krusius +1
Vortex lines affect the spatial order-parameter distribution in superfluid 3He-B owing to superflow circulating around vortex cores and due to the interaction of the order paramete…
Longitudinal NMR and Spin States in the A-like Phase of 3He in Aerogel
V. V. Dmitriev, L. V. Levitin, N. Mulders +1
It was found that two different spin states of the A-like phase can be obtained in aerogel sample. In one of these states we have observed the signal of the longitudinal NMR, while…