

Selected Publications
- Andreev Reflection in Superfluid He-3: A Probe for Quantum Turbulence
Bradley et al., Annual Review of Condensed Matter Physics Vol. 8: 407-430 (2017) - Operating Nanobeams in a Quantum Fluid
Bradley et al., Nature Scientific Reports 7, 4876 (2017) - Single Quantum Level Electron Turnstile
D.M.T. Van Zanten et al., Phys. Rev. Lett. 116 166801 (2016) - Topological Superconductivity and High Chern Numbers in 2D Ferromagnetic Shiba Lattices
J. Röntynen, T. Ojanen, Phys. Rev. Lett. 114 236803, (2015) - Squeezing of Quantum Noise of Motion in a Micromechanical Resonator
J.-M. Pirkkalainen et al., Phys. Rev. Lett 115, 24 (2015) - Direct-current superconducting quantum interference devices for the readout of metallic magnetic calorimeters
S. Kempf, A. Ferring, A. Fleischmann, C. Enss, Supercond. Sci. Technol. 28 , 045008 (2015)
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