Zobrazeno 1 - 10
of 192
pro vyhledávání: '"Pickett, G. R."'
Autor:
Autti, S., Haley, R. P., Jennings, A., Pickett, G. R., Surovtsev, E. V., Tsepelin, V., Zmeev, D. E.
Vibrating probes when immersed in a fluid can provide powerful tools for characterising the surrounding medium. In superfluid 3He-B, a condensate of Cooper pairs, the dissipation arising from the scattering of quasiparticle excitations from a mechani
Externí odkaz:
http://arxiv.org/abs/2403.06226
Autor:
Autti, S., Haley, R. P., Jennings, A., Pickett, G. R., Poole, M., Schanen, R., Soldatov, A. A., Tsepelin, V., Vonka, J., Zavjalov, V. V., Zmeev, D. E.
Publikováno v:
Nature Communications 14, 6819 (2023)
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 well at the boundaries of the container, confining a sea of quasipartic
Externí odkaz:
http://arxiv.org/abs/2303.16518
Autor:
Guthrie, A., Kafanov, S., Noble, M. T., Pashkin, Yu. A., Pickett, G. R., Tsepelin, V., Dorofeev, A. A., Krupenin, V. A., Presnov, D. E.
Since we still lack a theory of classical turbulence, attention has focused on the conceptually simpler turbulence in quantum fluids. Can such systems of identical singly-quantized vortices provide a physically accessible "toy model" of the classical
Externí odkaz:
http://arxiv.org/abs/2007.04482
Autor:
Autti, S., Guénault, A. M., Haley, R. P., Jennings, A., Pickett, G. R., Schanen, R., Soldatov, A. A., Tsepelin, V., Vonka, J., Zmeev, D. E.
Publikováno v:
Phys. Rev. B 102, 064508 (2020)
Understanding the temperature dependence of thermal boundary resistance, or Kapitza resistance, between liquid helium and sintered metal has posed a problem in low temperature physics for decades. In the ballistic regime of superfluid $^{3}$He-B, we
Externí odkaz:
http://arxiv.org/abs/2005.05838
Autor:
Autti, S., Haley, R. P., Jennings, A., Pickett, G. R., Schanen, R., Soldatov, A. A., Tsepelin, V., Vonka, J., Wilcox, T., Zmeev, D. E.
Publikováno v:
Nat Commun 11, 4742 (2020)
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 host Andreev-bound states, seemingly lift that strict protection. Here
Externí odkaz:
http://arxiv.org/abs/2002.10865
Autor:
Guthrie, A., Haley, R. P., Jennings, A., Kafanov, S., Kolosov, O., Mucientes, M., Noble, M. T., Pashkin, Yu. A., Pickett, G. R., Tsepelin, V., Zmeev, D. E., Efimov, V.
Flexural mode vibrations of miniature piezoelectric tuning forks (TF) are known to be highly sensitive to superfluid excitations and quantum turbulence in $\mathrm{^3He}$ and $\mathrm{^4He}$ quantum fluids, as well as to the elastic properties of sol
Externí odkaz:
http://arxiv.org/abs/1908.07853
Autor:
Guenault, A. M., Guthrie, A., Haley, R. P., Kafanov, S., Pashkin, Yu. A., Pickett, G. R., Tsepelin, V., Zmeev, D. E., Collin, E., Gazizulin, R., Maillet, O.
Publikováno v:
Phys. Rev. B 101, 060503 (2020)
Nanoscale mechanical resonators are widely utilized to provide high sensitivity force detectors. Here we demonstrate that such high quality factor resonators immersed in superfluid \(^4\mathrm{He}\) can be excited by a modulated flux of phonons. A na
Externí odkaz:
http://arxiv.org/abs/1907.01947
Autor:
Guenault, A. M., Guthrie, A., Haley, R. P., Kafanov, S., Pashkin, Yu. A., Pickett, G. R., Poole, M., Schanen, R., Tsepelin, V., Zmeev, D. E., Collin, E., Maillet, O., Gazizulin, R.
Superfluids, such as superfluid $^3\mathrm{He}$ and $^4\mathrm{He}$, exhibit a broad range of quantum phenomena and excitations which are unique to these systems. Nanoscale mechanical resonators are sensitive and versatile force detectors with the ab
Externí odkaz:
http://arxiv.org/abs/1907.00970
Autor:
Guénault, A. M., Guthrie, A., Haley, R. P., Kafanov, S., Pashkin, Yu. A., Pickett, G. R., Tsepelin, V., Zmeev, D. E., Collin, E., Gazizulin, R., Maillet, O., Arrayás, M., Trueba, J. L.
We report on nanomechanical resonators with very high-quality factors operated as mechanical probes in liquid helium \(^4\mathrm{He}\), with special attention to the superfluid regime down to millikelvin temperatures. Such resonators have been used t
Externí odkaz:
http://arxiv.org/abs/1810.10129
Autor:
Bradley, D. I., George, R., Guenault, A. M., Haley, R. P., Kafanov, S., Noble, M. T., Pashkin, Yu. A., Pickett, G. R., Poole, M., Prance, J. R., Sarsby, M., Schanen, R., Tsepelin, V., Wilcox, T., Zmeev, D. E.
Publikováno v:
Scientific Reports volume 7, Article number: 4876 (2017)
Microelectromechanical (MEMS) and nanoelectromechanical systems (NEMS) are ideal candidates for exploring quantum fluids since they can be manufactured reproducibly, cover the frequency range from hundreds of kilohertz up to gigahertz and usually hav
Externí odkaz:
http://arxiv.org/abs/1809.07411