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Showing 1–9 of 9 results
Advanced filters: Author: V. Tsepelin Clear advanced filters

  • A recent report on electrostatic field effect in superconducting devices provides a high potential for advanced quantum technology, but it remains controversial. Here, the authors report that the suppression of critical current, which was attributed to the field effect, can instead be explained by quasiparticle excitations in the constriction of superconducting devices.

    • I. Golokolenov
    • A. Guthrie
    • V. Tsepelin
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-7

  • Previous work has shown the detection of quantum turbulence with mechanical resonators but with limited spatial and temporal resolution. Here, the authors demonstrate real-time detection of single quantum vortices in superfluid 4He with millisecond and micron resolution at temperatures of 10 millikelvin.

    • A. Guthrie
    • S. Kafanov
    • D. E. Presnov
    ResearchOpen Access
    Nature Communications
    Volume: 12, P: 1-6

  • An experiment reports the unexpected behaviour of an object in uniform motion in superfluid helium-3 above the Landau critical velocity — the limit above which it can generate excitations at no energy cost.

    • D. I. Bradley
    • S. N. Fisher
    • D. E. Zmeev
    Research
    Nature Physics
    Volume: 12, P: 1017-1021

  • Understanding dynamics of fermionic bound states is important for their potential application in quantum devices. Here the authors study zero temperature dynamics and dissipation of fermions bound on a moving goal-post shaped wire in superfluid 3He-B.

    • S. Autti
    • S. L. Ahlstrom
    • D. E. Zmeev
    ResearchOpen Access
    Nature Communications
    Volume: 11, P: 1-7

  • It is difficult to measure the turbulent energy in a classical system as the turbulence contributes only a small kinetic energy compared with the enthalpy of the system. A quantum system, however, such as liquid helium at absolute zero, has zero enthalpy. Added vorticity therefore accounts for the total energy, thus allowing the turbulent energy to be measured directly

    • D. I. Bradley
    • S. N. Fisher
    • V. Tsepelin
    Research
    Nature Physics
    Volume: 7, P: 473-476