Superfluid nanomechanical resonator for quantum nanofluidics

Abstract

We have developed a nanomechanical resonator, for which the motional degree of freedom is a superfluid 4He oscillating flow confined to precisely defined nanofluidic channels. It is composed of an in-cavity capacitor measuring the dielectric constant, which is coupled to a superfluid Helmholtz resonance within nanoscale channels, and it enables sensitive detection of nanofluidic quantum flow. We present a model to interpret the dynamics of our superfluid nanomechanical resonator, and we show how it can be used for probing confined geometry effects on thermodynamic functions. We report isobaric measurements of the superfluid fraction in liquid 4He at various pressures, and the onset of quantum turbulence in restricted geometry.

arXiv comment10 pages, 11 figures

References in corpus (10)

• Nonlinear Micromechanical Casimir Oscillator
• Specific Heat of Liquid Helium in Zero Gravity very near the Lambda Point
• Detecting the Majorana fermion surface state of ${}^3$He-B through spin relaxation
• Crystalline order in superfluid 3He films
• Majorana Excitations, Spin- and Mass Currents on the Surface of Topological Superfluid ${}^3$He-B
• Flow Conductance of a Single Nanohole
• Hydrodynamics of Superfluid Helium in a Single Nanohole
• Slippage and boundary layer probed in an almost-ideal gas by a nano-mechanical oscillator
• Microfluidic and Nanofluidic Cavities for Quantum Fluids Experiments
• Ultrasonic Interferometer for First-Sound Measurements of Confined Liquid 4He

Cited by in corpus (19)

• Symmetry Protected Topological Superfluids and Superconductors --- From the Basics to ${}^3$He ---
• Stabilized Pair Density Wave via Nanoscale Confinement of Superfluid ${}^3$He
• Detecting continuous gravitational waves with superfluid ${}^4$He
• Superfluid phases of ${}^3$He in nano-scale channels
• Ultra-Low Dissipation Superfluid Micromechanical Resonator
• Thin film superfluid optomechanics
• Observation of bistable turbulence in quasi-two-dimensional superflow
• Tuning a 3D Microwave Cavity via Superfluid Helium at MilliKelvin Temperatures
• Temperature Dependence of Viscosity in Normal Fluid ${}^3$He Below 800mK Determined by a Micro-electro-mechanical Oscillator
• Andreev Bound States in Superconducting Films and Confined Superfluid He-3
• Surface-dominated finite size effects in nanoconfined superfluid helium
• Superfluid Optomechanics with Phononic Nanostructures
• Surface State Dissipation in Confined 3He-A
• Detection of Quantized Vortices using Fourth Sound Attenuation
• Helical spin texture in a thin film of superfluid ${}^3$He
• Evidence for 4D XY Quantum Criticality in ${}^4$He Confined in Nanoporous Media at Finite Temperatures
• 4D-XY Superfluid Transition and Dissipation in ${}^4$He Confined in Nanoporous Media
• Decay of two-dimensional superfluid turbulence over pinning surface
• Superfluid ${}^3$He-B Surface States in a Confined Geometry Probed by a Microelectromechanical Oscillator