Selected Publications
- Slippage and Boundary Layer Probed in an Almost Ideal Gas by a Nanomechanical Oscillator
M. Defoort et al., Phys. Rev. Lett. 113, 136101 (2014) - Evidence for the role of normal-state electrons in nanoelectromechanical damping mechanisms at very low temperatures
K.J. Lulla et al., Phys. Rev. Lett. 110, 177206 (2013) - Phase Diagram of the Topological Superfluid 3He Confined in a Nanoscale Slab Geometry
L.V. Levitin et al., Science 340, 841-844 (2013) - Energy and angular momentum balance in wall-bounded quantum turbulence at very low temperatures
J.J. Hosio et al., Nature Commun. 4, 1614 (2013) - Evidence for Helical Nuclear Spin Order in GaAs Quantum Wires
C.P. Scheller et al., Phys. Rev. Lett. 112, 066801 (2013) - Observation of a roton collective mode in a two-dimensional Fermi liquid
H. Godfrin et al., Nature 483, 576 (2012) - The Josephson heat interferometer
F. Giazotto, M.J. Martinez-Perez, Nature 492, 401 (2012)
Turbulent drag on a low-frequency vibrating grid in superfluid 4He at very low temperatures
D.I. Bradley, S.N. Fisher, A.M. Guénault, R.P. Haley, Mukesh Kumar, C.R. Lawson, Roch Schanen, P.V.E. McClintockWe present measurements of the dissipative turbulent drag on a vibrating grid in superfluid 4He over a wide range of (low) frequencies. At high velocities, the dissipative drag is independent of frequency and is approximately the same as that measured in normal liquid 4He. We present measurements on a similar grid in superfluid 3He-B at low temperatures which shows an almost identical turbulent drag coefficient at low frequencies. However, the turbulent drag in 3He-B is substantially higher at higher frequencies. We also present measurements of the inertial drag coefficient for grid turbulence in 4He. The inertial drag coefficient is significantly reduced by turbulence in both superfluid and normal liquid 4He.
Phys. Rev. B 85, 224533 (2012)
doi: 10.1103/PhysRevB.85.224533