Professor George Pickett

Professor George Pickett

Distinguished Professor, Research Professor

A12 Physics Building
Lancaster University
Bailrigg
Lancaster
United Kingdom
LA1 4YB

+44 (0)1524 593070

Research Interests

Over the last twenty years, with colleagues Tony Guénault, Ian Bradley and Shaun Fisher we have built up a microkelvin facility at Lancaster based on the use of the most advanced techniques available at the time of construction. This facility has been rather successful cryogenically and the low temperature capability has given us unique access to several new fields. Of the subjects which are of interest in the microkelvin regime 3He remains the most rewarding. Both isotopes of helium are quantum fluids and solids, and as well as being extremely interesting in their own right, continue to provide simple systems for the testing of a wide range of models of condensed matter behaviour. Superfluid 3He is especially fascinating since it is the only p-wave paired superfluid accessible to measurement. However, since the transition temperature for superfluidity is not reached until the 1 to 3 milliKelvin temperature range, any experimental study must rely on considerable cryogenic engineering.

With our very low temperatures we have been able to study superfluid 3He essentially in the zero temperature limit. As a consequence of the superfluid energy gap, the density of excitations (quasiparticles) in the low temperature B-phase superfluid falls off very rapidly with temperature. At the lowest temperatures we can reach, the normal fluid fraction has fallen to 1 in a million. This means that the mean free path for quasiparticle-quasiparticle scattering becomes very long (of the order of kilometres) and the quasiparticles behave as a gas of non-interacting ballistic particles. It is the study of the behaviour of this quite amazing excitation gas for which the Lancaster group has become most known.

We have been able to elucidate the dynamical behaviour of a gas of quasiparticles and with the black-body radiator methods developed by Shaun Fisher we have been able to use the superfluid 3He excitation gas as a sensitive particle detector and latterly in an experiment in the CRTBT laboratory in Grenoble the methods have been used to simulate the creation of cosmic strings in the early Universe.

Superfluid 3He has many other interesting properties. One which is unique is the magnetic aspects of the superfluid. Since the nuclei in the cooper pairs are associated with a nuclear momewnt one component of the superfluid wavefunction is concerned with the magnitude and direction of this magnetization. However, magnetization is something we can manipulate from outside, for example by NMR. The Moscow group of Borovik-Romanov, Bunkov, Dmitriev and Mukharskiy were the first to recognise the unique features of superfluid magnetism. If we set up a gradient in the direction of the magnetization, which we can do by applying an NMR pulse to the liquid in a magnetic field gradient when the magnetization will precess at differential rates depending on position and accordingly the direction of the magnetization will wind up the wave function. A gradient applied to a superfluid wavefunction will be accompanied by a superflow to cancel it. In this case a spin-supercurrent. This feedback mechanism leads to a number of interesting precessing domain structures. We began studying these properties after being introduced to the subject of superfluid NMR by Yuri Bunkov. Recently we have been able to see NMR precession which persists for periods of many minutes, very close to being "persistent" magnetic behaviour.

This work has all been made very much at the limit of what is cryogenically possible. To keep up with current advances we are just commissioning a new microkelvin facility which has a 1.8 mK dilution refrigerator to provide an advanced testbed for our experiments well into the next millennium.

 

George Pickett's Publications

2014

Hysteresis, switching and anomalous behaviour of a quartz tuning fork in superfluid 4He

Bradley, I., Fear, M., Fisher, S., Guénault, T., Haley, R., Lawson, C., Pickett, G., Schanen, R., Tsepelin, V. & Wheatland, L. 04/2014 In : Journal of Low Temperature Physics. 175, 1-2, p. 379-384 6 p.

Research output: Contribution to journalJournal article

Plastic properties of solid 4He probed by a moving wire: viscoelastic and stochastic behavior under high stress

Ahlstrom, S., Bradley, I., Clovecko, M., Fisher, S., Guénault, T., Guise, E. A., Haley, R., Kumar, M., McClintock, P. V. E., Pickett, G., Polturak, E., Poole, M., Todoshchenko, I. A., Tsepelin, V. & Woods, A. 04/2014 In : Journal of Low Temperature Physics. 175, 1-2, p. 147-153 7 p.

Research output: Contribution to journalJournal article

Response of a mechanical oscillator in solid 4He

Ahlstrom, S., Bradley, I., Clovecko, M., Guénault, T., Guise, E. A., Haley, R., Kolosov, O., Kumar, M., McClintock, P. V. E., Pickett, G., Polturak, E., Poole, M., Todoshchenko, I. A., Tsepelin, V. & Woods, A. 04/2014 In : Journal of Low Temperature Physics. 175, 1-2, p. 140-146 7 p.

Research output: Contribution to journalJournal article

2013

The Onset of Vortex Production by a Vibrating Wire in Superfluid He-3-B

Bradley, D. I., Fisher, S. N., Ganshin, A., Guénault, A. M., Haley, R. P., Jackson, M. J., Pickett, G. R. & Tsepelin, V. 06/2013 In : Journal of Low Temperature Physics. 171, 5-6, p. 582-588 7 p.

Research output: Contribution to journalJournal article

Thermometry in Normal Liquid He-3 Using a Quartz Tuning Fork Viscometer

Bradley, D. I., Clovecko, M., Fisher, S. N., Garg, D., Guénault, A. M., Guise, E., Haley, R. P., Pickett, G. R., Poole, M. & Tsepelin, V. 06/2013 In : Journal of Low Temperature Physics. 171, 5-6, p. 750-756 7 p.

Research output: Contribution to journalJournal article

2012

Decay of persistent precessing domains in 3He-B at very low temperatures.

Fisher, S., Skyba, P., Pickett, G. & Suramlishvili, N. 6/07/2012 In : Physical Review B. 86, 2, 10 p.024506

Research output: Contribution to journalJournal article

Crossover from hydrodynamic to acoustic drag on quartz tuning forks in normal and superfluid 4He

Bradley, D. I., Clovecko, M., Fisher, S., Deepak, D., Guise, E., Haley, R., Kolosov, O., Pickett, G., Tsepelin, V., Schmoranzer, D. & Skrbek, L. 6/01/2012 In : Physical Review B. 85, 1, p. - 9 p.014501

Research output: Contribution to journalJournal article

2011

A New Device for Studying Low or Zero Frequency Mechanical Motion at Very Low Temperatures

Bradley, I., Clovecko, M., Fear, M., Fisher, S., Guénault, A. M., Haley, R., Lawson, C., Pickett, G., Schanen, R., Tsepelin, V. & Williams, P. 11/2011 In : Journal of Low Temperature Physics. 165, 3-4, p. 114-131 17 p.

Research output: Contribution to journalJournal article

Direct measurement of the energy dissipated by quantum turbulence

Bradley, I., Fisher, S., Guénault, A. M., Haley, R., Pickett, G., Potts, D. & Tsepelin, V. 06/2011 In : Nature Physics. 7, 6, p. 473-476

Research output: Contribution to journalJournal article

History Dependence of Turbulence Generated by a Vibrating Wire in Superfluid (4)He at 1.5 K

Bradley, I., Guénault, A. M., Fisher, S., Haley, R., Jackson, M., Nye, D., O'Shea, K., Pickett, G. & Tsepelin, V. 02/2011 In : Journal of Low Temperature Physics. 162, 3-4, p. 375-382

Research output: Contribution to journalJournal article

2010

Measuring the Prong Velocity of Quartz Tuning Forks Used to Probe Quantum Fluids

Bradley, I., Crookston, P., Fear, M., Fisher, S., Foulds, G., Garg, D., Guénault, A. M., Guise, E. A., Haley, R., Kolosov, O., Pickett, G., Schanen, R. & Tsepelin, V. 12/2010 In : Journal of Low Temperature Physics. 161, 5-6, p. 536-547

Research output: Contribution to journalJournal article

Magnetic phase transition in a nanonetwork of solid (3)He in aerogel

Bradley, I., Fisher, S., Guénault, A. M., Haley, R., Mulders, N., Pickett, G., Potts, D., Skyba, P., Smith, J., Tsepelin, V. & Whitehead, R. C. V. 09/2010 In : Physical Review Letters. 105, 12, 125303

Research output: Contribution to journalJournal article

Generation, evolution, and decay of pure quantum turbulence: a full Biot-Savart simulation

Fujiyama, S., Mitani, A., Tsubota, M., Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P., Pickett, G. R. & Tsepelin, V. 1/05/2010 In : Physical Review B. 81, 18, p. - 4 p.180512

Research output: Contribution to journalJournal article

2009

The damping of a quartz tuning fork in superfluid He-3-B at low temperatures

Bradley, D. I., Crookston, P., Fisher, S. N., Ganshin, A., Guénault, A. M., Haley, R. P., Jackson, M. J., Pickett, G. R., Schanen, R. & Tsepelin, V. 12/2009 In : Journal of Low Temperature Physics. 157, 5-6, p. 476-501 26 p.

Research output: Contribution to journalJournal article

Transition to turbulence for a quartz tuning fork in superfluid He-4

Bradley, D. I., Fear, M. J., Fisher, S. N., Guénault, A. M., Haley, R. P., Lawson, C. R., McClintock, P. V. E., Pickett, G. R., Schanen, R., Tsepelin, V. & Wheatland, L. A. 09/2009 In : Journal of Low Temperature Physics. 156, 3-6, p. 116-131 16 p.

Research output: Contribution to journalJournal article

The Transition to Turbulent Drag for a Cylinder Oscillating in Superfluid He-4 : A Comparison of Quantum and Classical Behavior.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P., Tsepelin, V., Pickett, G. R. & Zaki, K. L. 02/2009 In : Journal of Low Temperature Physics. 154, 3-4, p. 97-116 20 p.

Research output: Contribution to journalJournal article

2008

The Annihilation of Two Phase Interfaces in Superfluid He-3: Simulated Brane Annihilation in the Laboratory.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P., Kopu, J., Martin, H., Pickett, G. R., Roberts, J. E. & Tsepelin, V. 11/2008 In : JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN. 77, 11, p. 111005

Research output: Contribution to journalJournal article

Annihilation of an AB/BA interface pair in superfluid helium-3 as a simulation of cosmological brane interaction.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P., Kopu, J., Martin, H., Pickett, G. R., Roberts, J. E. & Tsepelin, V. 28/08/2008 In : Philosophical Transactions A: Mathematical, Physical and Engineering Sciences . 366, 1877, p. 2803-2812 10 p.

Research output: Contribution to journalJournal article

Fluctuations and correlations of pure quantum turbulence in superfluid He-3_B.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P., O'Sullivan, S., Pickett, G. R. & Tsepelin, V. 8/08/2008 In : Physical Review Letters. 101, 6, p. 065302

Research output: Contribution to journalJournal article

Cosmology meets condensed matter - Introduction.

Kibble, T. W. B. & Pickett, G. R. 08/2008 In : Philosophical Transactions A: Mathematical, Physical and Engineering Sciences . 366, 1877, p. 2793-2802 10 p.

Research output: Contribution to journalJournal article

Grid turbulence in superfluid He-3-B at low temperatures.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P., Holmes, M., O'Sullivan, S., Pickett, G. R. & Tsepelin, V. 02/2008 In : Journal of Low Temperature Physics. 150, 3-4, p. 364-372 9 p.

Research output: Contribution to journalJournal article

Magnetic distortion of the B-like phase of superfluid He-3 confined in aerogel.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P., Pickett, G. R., Roberts, J. E., O'Sullivan, S. & Tsepelin, V. 02/2008 In : Journal of Low Temperature Physics. 150, 3-4, p. 445-452 8 p.

Research output: Contribution to journalJournal article

Relic topological defects from brane annihilation simulated in superfluid He-3.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P., Kopu, J., Martin, H., Pickett, G. R., Roberts, J. E. & Tsepelin, V. 01/2008 In : Nature Physics. 4, 1, p. 46-49 4 p.

Research output: Contribution to journalJournal article

2007

Non-linear mechanical response of the a-like phase of superfluid He-3 in aerogel.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P., Pickett, G. R., Roberts, J. E., O'Sullivan, S. & Tsepelin, V. 09/2007 In : Journal of Low Temperature Physics. 148, 5-6, p. 603-607 5 p.

Research output: Contribution to journalJournal article

The AB interface in superfluid He-3 as a simulated cosmological brane.

Bradley, I., Fisher, S. N., Guénault, A. M., Haley, R. P., Kopu, J., Martin, H., Pickett, G. R., Roberts, J. E. & Tsepelin, V. 09/2007 In : Journal of Low Temperature Physics. 148, 5-6, p. 465-473 9 p.

Research output: Contribution to journalJournal article

Vortex rings in superfluid He-3-B at low temperatures.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P., Matthews, C. J., Pickett, G. R., Roberts, J. E., O'Sullivan, S. & Tsepelin, V. 08/2007 In : Journal of Low Temperature Physics. 148, 3-4, p. 235-243 9 p.

Research output: Contribution to journalJournal article

Contrasting mechanical anisotropies of the superfluid He-3 phases in aerogel.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P., Mulders, N., O'Sullivan, S., Pickett, G. R., Roberts, J. E. & Tsepelin, V. 02/2007 In : Physical Review Letters. 98, 7, p. 075302

Research output: Contribution to journalJournal article

2006

Decay of quantum turbulence generated by a vibrating grid at low temperatures in superfluid He-3-B.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P., Matthews, C. J., Pickett, G. R., Tsepelin, V. & Zaki, K. 7/09/2006 In : American Institute of Physics Conference Proceedings. 850, p. 175-176 2 p.

Research output: Contribution to journalJournal article

The generation of quantum turbulence in He-3-B by a vibrating grid at low temperatures.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P., Matthews, C. J., Pickett, G. R., Tsepelin, V. & Zaki, K. 7/09/2006 In : American Institute of Physics Conference Proceedings. 850, p. 173-174 2 p.

Research output: Contribution to journalJournal article

The thermal boundary resistance of the superfluid He-3 A-B phase interface in the low temperature limit.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P., Martin, H., Pickett, G. R., Roberts, J. E. & Tsepelin, V. 7/09/2006 In : American Institute of Physics Conference Proceedings. 850, p. 87-88 2 p.

Research output: Contribution to journalJournal article

Thermal transport by ballistic quasiparticles in superfluid He-3-B in the low temperature limit.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P., Martin, H., Pickett, G. R., Roberts, J. E. & Tsepelin, V. 7/09/2006 In : American Institute of Physics Conference Proceedings. 850, p. 93-94 2 p.

Research output: Contribution to journalJournal article

Superfluid He-3 : a laboratory for studying turbulence.

Pickett, G. R. 04/2006 In : Acta Physica Slovaca. 56, 2, p. 41-48 8 p.

Research output: Contribution to journalJournal article

Decay of pure quantum turbulence in superfluid He-3-B.

Bradley, D. I., Clubb, D. O., Fisher, S. N., Guénault, A. M., Haley, R. P., Matthews, C. J., Pickett, G. R., Tsepelin, V. & Zaki, K. 23/01/2006 In : Physical Review Letters. 96, 3, p. 035301

Research output: Contribution to journalJournal article

A levitated droplet of superfluid He-3-B entirely surrounded by He-3-A.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P., Martin, H., Pickett, G. R., Roberts, J. E. & Tsepelin, V. 2006 In : American Institute of Physics Conference Proceedings. 850, p. 95-96 2 p.

Research output: Contribution to journalJournal article

Coupling between solid He-3 on aerogel and superfluid He-3 in the low temperature limit.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P., Pickett, G. R., Skyba, P., Tsepelin, V. & Whitehead, R. C. V. 2006 In : American Institute of Physics Conference Proceedings. 850, p. 243-244 2 p.

Research output: Contribution to journalJournal article

Quantum turbulence.

Fisher, S. N. & Pickett, G. R. 2006 In : Physics World. 19, 4, p. 22-27 6 p.

Research output: Contribution to journalJournal article

Superfluid 3He: A laboratory for studying turbulence

Pickett, G. R. 2006 In : Acta Physica Slovaca. 56, 2

Research output: Contribution to journalJournal article

The generation of quantum turbulence in 3He-B by a vibrating grid at low temperatures

Pickett, G. R. 2006 In : American Institute of Physics Conference Proceedings. 850, p. 173-174 2 p.

Research output: Contribution to journalJournal article

The thermal boundary resistance of the superfluid 3He A-B phase interface in the low temperature limit

Pickett, G. R. 2006 In : American Institute of Physics Conference Proceedings. 850, p. 87-88 2 p.

Research output: Contribution to journalJournal article

Thermal transport by ballistic quasiparticles in superfluid 3He-B in the low temperature limit

Pickett, G. R. 2006 In : American Institute of Physics Conference Proceedings. 850, p. 93-94 2 p.

Research output: Contribution to journalJournal article

2005

Emission of discrete vortex rings by a vibrating grid in superfluid He-3-B : a precursor to quantum turbulence.

Bradley, D. I., Clubb, D. O., Fisher, S. N., Guénault, A. M., Haley, R. P., Matthews, C. J., Pickett, G. R., Tsepelin, V. & Zaki, K. 13/07/2005 In : Physical Review Letters. 95, 3, p. 035302

Research output: Contribution to journalJournal article

Coherent spin precession in superfluid He-3-B excited in a field minimum at low temperatures.

Fisher, S. N., Guénault, A. M., Matthews, C. J., Skyba, P., Pickett, G. R. & Zaki, K. L. 02/2005 In : Journal of Low Temperature Physics. 138, 3-4, p. 777-782 6 p.

Research output: Contribution to journalJournal article

The dynamic texture of superfluid He-3-B at very low temperatures and in high magnetic fields.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P., Martin, H. & Pickett, G. R. 02/2005 In : Journal of Low Temperature Physics. 138, 3-4, p. 583-588 6 p.

Research output: Contribution to journalJournal article

Turbulence generated by vibrating wire resonators in superfluid He-4 at low temperatures.

Bradley, D. I., Clubb, D. O., Fisher, S. N., Guénault, A. M., Haley, R. P., Matthews, C. J., Pickett, G. R. & Zaki, K. L. 02/2005 In : Journal of Low Temperature Physics. 138, 3-4, p. 493-498 6 p.

Research output: Contribution to journalJournal article

Preliminary measurements on coupling between superfluid He-3 and Kapton or aerogel in the low temperature limit.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P., Mulders, N., Pickett, G. R., Skyba, P. & Whitehead, R. C. V. 01/2005 In : Journal of Low Temperature Physics. 138, 1-2, p. 129-134 6 p.

Research output: Contribution to journalJournal article

The thermal damping of an aerogel resonator in superfluid He-3-B at ultra low temperatures.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Matthews, C. J., Skyba, P., Pickett, G. R. & Zaki, K. L. 01/2005 In : Journal of Low Temperature Physics. 138, 1-2, p. 123-128 6 p.

Research output: Contribution to journalJournal article

2004

Quantum turbulence in superfluid He-3 illuminated by a beam of quasiparticle excitations.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Lowe, M. R., Pickett, G. R., Rahm, A. & Whitehead, R. C. V. 12/2004 In : Physical Review Letters. 93, 23, p. 235302

Research output: Contribution to journalJournal article

Interfacial energy of the superfluid He-3 A-B phase interface in the zero-temperature limit.

Bartkowiak, M., Fisher, S. N., Guénault, A. M., Haley, R. P., Pickett, G. R. & Skyba, P. 23/07/2004 In : Physical Review Letters. 93, 4, p. 046301

Research output: Contribution to journalJournal article

Superfluid He-3 in the zero-temperature limit.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P. & Pickett, G. R. 06/2004 In : Journal of Low Temperature Physics. 135, 5-6, p. 385-397 13 p.

Research output: Contribution to journalJournal article

Spatial manipulation of the persistent precessing spin domain in superfluid He-3-B.

Bradley, D. I., Clubb, D. O., Fisher, S. N., Guénault, A. M., Matthews, C. J., Pickett, G. R. & Skyba, P. 01/2004 In : Journal of Low Temperature Physics. 134, 1-2, p. 351-356 6 p.

Research output: Contribution to journalJournal article

The response of a mechanical oscillator at the superfluid He-3 AB interface.

Bartkowiak, M., Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P. & Pickett, G. R. 01/2004 In : Journal of Low Temperature Physics. 134, 1-2, p. 345-350 6 p.

Research output: Contribution to journalJournal article

The stability of the superfluid He-3 AB interface pinned in an aperture.

Bartkowiak, M., Bradley, D. I., Fisher, S. N., Guénault, A. M., Haley, R. P., Pickett, G. R. & Skyba, P. 01/2004 In : Journal of Low Temperature Physics. 134, 1-2, p. 387-392 6 p.

Research output: Contribution to journalJournal article

Vortex generation in superfluid He-3 by a vibrating grid.

Bradley, D. I., Clubb, D. O., Fisher, S. N., Guénault, A. M., Matthews, C. J. & Pickett, G. R. 01/2004 In : Journal of Low Temperature Physics. 134, 1-2, p. 381-386 6 p.

Research output: Contribution to journalJournal article

2003

Thermal conductivity of liquid He-3 in aerogel: A gapless superfluid.

Fisher, S. N., Guénault, A. M., Mulders, N. & Pickett, G. R. 09/2003 In : Physical Review Letters. 91, 10, p. 105303

Research output: Contribution to journalJournal article

Turbulence: Suddenly it's chaos.

Pickett, G. 28/08/2003 In : Nature. 424, 6952, p. 1002-1003 2 p.

Research output: Contribution to journalJournal article

A spin laser? The persistent processing domain in superfluid He-3-B at ultralow temperatures.

Fisher, S. N., Guénault, A. M., Pickett, G. R. & Skyba, P. 05/2003 In : Physica B: Condensed Matter. 329, 1, p. 80-81 2 p.

Research output: Contribution to journalJournal article

Direct observation of the Andreev reflection of a quasiparticle beam by quantum turbulence in superfluid He-3-B.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Lowe, M. R., Pickett, G. R. & Rahm, A. 05/2003 In : Physica B: Condensed Matter. 329, 1, p. 64-65 2 p.

Research output: Contribution to journalJournal article

Spatial extent of quantum turbulence in non-rotating superfluid He-3-B.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Lowe, M. R., Pickett, G. R. & Rahm, A. 05/2003 In : Physica B: Condensed Matter. 329, 1, p. 104-405 302 p.

Research output: Contribution to journalJournal article

Superfluid He-3 A-B surface tension

Bartkowiak, M., Haley, R. P., Fisher, S. N., Guénault, A. M., Pickett, G. R. & Skyba, P. 05/2003 In : Physica B: Condensed Matter. 329-333, 1, p. 122-125 4 p.

Research output: Contribution to journalJournal article

Superfluid He-3 in the zero-temperature limit.

Pickett, G. R. & Fisher, S. N. 05/2003 In : Physica B: Condensed Matter. 329, 1, p. 75-79 5 p.

Research output: Contribution to journalJournal article

The interfacial thermal resistance between bulk superfluid He-3 and liquid He-3 in aerogel at ultralow temperatures

Fisher, S. N., Guénault, A. M., Pickett, G. R. & Sauer, F. 05/2003 In : Physica B: Condensed Matter. 329-333, 1, p. 311-312 2 p.

Research output: Contribution to journalJournal article

Vibrating wire measurements in dilute 3He–4He solutions at ballistic quasiparticle regime.

Martikainen, J., Tuoriniemi, J., Pentti, E. & Pickett, G. 05/2003 In : Physica B: Condensed Matter. 329-33, Part 1, p. 178-179 2 p.

Research output: Contribution to journalJournal article

2002

Thermal conductivity of normal liquid He-3 in aerogel.

Reeves, P. A., Tvalashvili, G., Fisher, S. N., Guénault, A. M. & Pickett, G. R. 11/2002 In : Journal of Low Temperature Physics. 129, 3-4, p. 185-193 9 p.

Research output: Contribution to journalJournal article

Comment on "Nucleation and interfacial coupling between pure and dirty superfluid phases of He-3"

Fisher, S. N., Haley, R. P. & Pickett, G. R. 3/05/2002 In : Physical Review Letters. 88, 20, 1 p.209601

Research output: Contribution to journalEditorial

The wall potential in the pores of Vycor glass experienced by He-3 quasiparticles in a dilute He-3-He-4 solution.

Reeves, P. A., Tvalashvili, G., Brussaard, P., Fisher, S. N., Guénault, A. M. & Pickett, G. R. 03/2002 In : Journal of Low Temperature Physics. 126, 5-6, p. 1457-1470 14 p.

Research output: Contribution to journalJournal article

The thermal conductivity of superfluid He-3 in aerogel: a measurement of the energy gap.

Fisher, S. N., Guénault, A. M., Hale, A. J. & Pickett, G. R. 01/2002 In : Journal of Low Temperature Physics. 126, 1-2, p. 673-678 6 p.

Research output: Contribution to journalJournal article

The unique superfluid He-3 A-B interface: Surface tension and contact angle.

Bartkowiak, M., Fisher, S. N., Guénault, A. M., Haley, R. P., Pickett, G. R., Rogge, M. C. & Skyba, P. 01/2002 In : Journal of Low Temperature Physics. 126, 1-2, p. 533-538 6 p.

Research output: Contribution to journalJournal article

2001

Comment on "Repetitive single vortex-loop creation by a vibrating wire in superfluid He-3-B" - Reply.

Bradley, D. I. & Pickett, G. R. 07/2001 In : Physical Review Letters. 87, 5, 1 p.059602

Research output: Contribution to journalJournal article

Preliminary measurements of Andreev reflection of quasiparticles by turbulence in superfluid He-3.

Bradley, D. I., Fisher, S. N., Guénault, A. M., Lowe, M. R., Pickett, G. R. & Rahm, A. 07/2001 In : Journal of Low Temperature Physics. 124, 1-2, p. 113-122 10 p.

Research output: Contribution to journalJournal article

Phase diagram of the A and B phases of superfluid He-3 in aerogel.

Brussaard, P., Fisher, S. N., Guénault, A. M., Hale, A. J., Mulders, N. & Pickett, G. R. 05/2001 In : Physical Review Letters. 86, 20, p. 4580-4583 4 p.

Research output: Contribution to journalJournal article

Generation and detection of quantum turbulence in Superfluid He-3-B.

Fisher, S. N., Hale, A. J., Guénault, A. M. & Pickett, G. R. 01/2001 In : Physical Review Letters. 86, 2, p. 244-247 4 p.

Research output: Contribution to journalJournal article

2000

Novel oscillating aerogel experiments in superfluid He-3 at ultralow temperatures.

Brussaard, P., Fisher, S. N., Guénault, A. M., Hale, A. J. & Pickett, G. R. 12/2000 In : Journal of Low Temperature Physics. 121, 5-6, p. 555-560 6 p.

Research output: Contribution to journalJournal article

Thirty-minute coherence in free induction decay signals in superfluid He-3-B.

Fisher, S. N., Guénault, A. M., Hale, A. J., Pickett, G. R., Reeves, P. A. & Tvalashvili, G. 12/2000 In : Journal of Low Temperature Physics. 121, 5-6, p. 303-308 6 p.

Research output: Contribution to journalJournal article

Primary and secondary nucleation of the transition between the A and B phases of superfluid He-3.

Bartkowiak, M., Fisher, S. N., Guénault, A. M., Haley, R. P., Pickett, G. R., Plenderleith, G. N. & Skyba, P. 11/2000 In : Physical Review Letters. 85, 20, p. 4321-4324 4 p.

Research output: Contribution to journalJournal article

Andreev reflection of quasiparticles by a vortex tangle in superfluid He-3-B?

Fisher, S. N., Guénault, A. M., Hale, A. J. & Pickett, G. R. 07/2000 In : Journal of Low Temperature Physics. 121, 5-6, p. 393-398 6 p.

Research output: Contribution to journalJournal article

Asymmetrical nucleation of the A-B transition in superfluid He-3.

Bartkowiak, M., Fisher, S. N., Guénault, A. M., Haley, R. P., Plenderleith, G. N., Pickett, G. R. & Skyba, P. 07/2000 In : Physica B: Condensed Matter. 284-28, 1, p. 242-243 2 p.

Research output: Contribution to journalJournal article

Forced oscillation of the A-B phase boundary in superfluid He-3.

Bartkowiak, M., Fisher, S. N., Guénault, A. M., Haley, R. P., Plenderleith, G. N., Pickett, G. R. & Skyba, P. 07/2000 In : Physica B: Condensed Matter. 284-28, 1, p. 240-241 2 p.

Research output: Contribution to journalJournal article

Mesoscopic behaviour of He-3 quasiparticles in a dilute He-3-He-4 solution in Vycor glass

Reeves, P. A., Guénault, A. M., Fisher, S. N., Pickett, G. R. & Tvalashvili, G. 07/2000 In : Physica B: Condensed Matter. 284-288, 1, p. 319-320 2 p.

Research output: Contribution to journalJournal article

Cooling metals to the microkelvin regime, then and now

Pickett, G. R. 05/2000 In : Physica B: Condensed Matter. 280, 1-4, p. 467-473 7 p.

Research output: Contribution to journalJournal article

The thermodynamics of the A-B transition in superfluid He-3 as a probe of the A-phase gap node geometry.

Bartkowiak, M., Fisher, S. N., Guénault, A. M., Haley, R. P., Plenderleith, G. N., Pickett, G. R. & Skyba, P. 05/2000 In : Physica B: Condensed Matter. 280, 1-4, p. 108-111 4 p.

Research output: Contribution to journalJournal article

Regular vortex production by a moving wire in superfluid He-3-B.

Bradley, D. I. & Pickett, G. R. 2000 Topological Defects and the non-equilibrium dynamics of symmetry breaking phase transitions. Bunkov, Y. M. & Godfrin, H. (eds.). Dordrecht: Springer, Vol. 549, p. 345-351 7 p. (NATO ADVANCED SCIENCE INSTITUTES SERIES, SERIES C, MATHEMATICAL AND PHYSICAL SCIENCES).

Research output: Contribution in Book/Report/ProceedingsChapter

1999

Thermodynamics of the A-B phase transition and the geometry of the A-phase gap nodes in superfluid He-3 at low temperatures

Bartkowiak, M., Daley, S. W. J., Fisher, S. N., Guénault, A. M., Plenderleith, G. N., Haley, R. P., Pickett, G. R. & Skyba, P. 10/1999 In : Physical Review Letters. 83, 17, p. 3462-3465 4 p.

Research output: Contribution to journalJournal article

Persistent coherent spin precession in superfluid He-3-B driven by off-resonant excitation

Cousins, D. J., Fisher, S. N., Gregory, A. I., Pickett, G. R. & Shaw, N. S. 31/05/1999 In : Physical review letters. 82, 22, p. 4484-4487 4 p.

Research output: Contribution to journalJournal article

An advanced dilution refrigerator designed for the new lancaster microkelvin facility.

Cousins, D. J., Fisher, S. N., Guénault, A. M., Haley, R. P., Miller, I. E., Pickett, G. R., Plenderleith, G. N., Skyba, P., Thibault, P. Y. A. & Ward, M. G. 03/1999 In : Journal of Low Temperature Physics. 114, 5-6, p. 547-570 24 p.

Research output: Contribution to journalJournal article

1998

Measurements on a dynamic A-B phase boundary in superfluid He-3 at very low temperatures.

Fisher, S. N., Guénault, A. M., Haley, R. P., Pickett, G. R., Plenderleith, G. N. & Skyba, P. 12/1998 In : Journal of Low Temperature Physics. 113, 5-6, p. 651-659 9 p.

Research output: Contribution to journalJournal article

Mesoscopic behaviour of the neutral Fermi gas He-3 confined in quantum wires

Phillipson, S. L., Guénault, A. M., Fisher, S. N., Pickett, G. R. & Thibault, P. J. Y. 8/10/1998 In : Nature. 395, 6702, p. 578-580 3 p.

Research output: Contribution to journalJournal article

Superfluid He-3 simulation of cosmic string creation in the early universe

Bauerle, C., Bunkov, Y. M., Fisher, S. N., Godfrin, H. & Pickett, G. R. 01/1998 In : Journal of Low Temperature Physics. 110, 1-2, p. 13-22 10 p.

Research output: Contribution to journalJournal article

1996

Texture dependence of the persistent NMR signal in superfluid3He-B.

Bunkov, Y. M., Cousins, D. J., Enrico, M. P., Fisher, S. N., Pickett, G. R., Shaw, N. S. & Tych, W. 1996 In : Czechoslovak Journal of Physics. 46, S1, p. 233-234 2 p.

Research output: Contribution to journalJournal article

1995

Potential dark matter detector?: the detection of low energy neutrons by superfluid 3He

Bradley, D. I., Bunkov, Y. M., Cousins, D. J., Enrico, M. P., Fisher, S., Follows, M. R., Guénault, A. M., Hayes, W. M., Pickett, G. & Sloan, T. 4/09/1995 In : Physical review letters. 75, 10, p. 1887-1890 4 p.

Research output: Contribution to journalJournal article

A pumping experiment in dilute 3He-4He solutions at millikelvin temperatures

Fisher, S. N., Guénault, A. M., Jackson, D. A., Pickett, G., Torizuka, K. & Turner, R. P. 08/1995 In : Journal of Low Temperature Physics. 100, 3-4, p. 241-252 12 p.

Research output: Contribution to journalJournal article

1994

T-3 temperature dependence and a length scale for the thermal boundary resistance between a saturated dilute 3He-4He solution and sintered silver

Cousins, D. J., Fisher, S. N., Guénault, A. M., Pickett, G., Smith, E. N. & Turner, R. P. 7/11/1994 In : Physical review letters. 73, 19, p. 2583-2586 4 p.

Research output: Contribution to journalJournal article

The A-phase at very low temperatures, a one-dimensional excitation gas

FISHER, S. N., Guénault, A. M. & Pickett, G. 02/1994 In : Physica B: Condensed Matter. 194-196, 1, p. 793-794 2 p.

Research output: Contribution to journalJournal article

1978

Nonlinear behaviour of positive ions in normal liquid 3He : a comparison between experiment and a parameterless theoretical prediction.

Alexander, P. W., McClintock, P. V. E., Pickett, G. R. & Bowley, R. M. 28/11/1978 In : Journal of Physics C: Solid State Physics. 11, 22, p. L881-L885

Research output: Contribution to journalJournal article

1975

Anomalous positive ion mobility in liquid 3He.

Barber, C. N., McClintock, P. V. E., Miller, I. E. & Pickett, G. R. 8/09/1975 In : Physics Letters A. 54, 3, p. 241-242 2 p.

Research output: Contribution to journalJournal article