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Home > Research > Researchers > Shaun Fisher
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Current Postgraduate Research Students

Shaun Fisher supervises 5 postgraduate research students. Some of the students have produced research profiles, these are listed below:

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Professor Shaun Fisher

Professor

Shaun Fisher

Physics Building

Lancaster University

Bailrigg

Lancaster LA1 4YB

United Kingdom

Tel: +44 1524 594480

Location: A47

PhD supervision

Quantum Fluids
Ultra Low Temperature Physics

Research Interests

I graduated from St Edmund Hall, Oxford in 1988. Since then I have been researching various aspects of quantum fluids and solids with the Lancaster Ultra-Low Temperature Group. We have advanced microKelvin cooling techniques and have studied superfluid 3He and related systems. Our group uses 'Lancaster-Style Nuclear cooling cells' which allows us to cool electrons in copper to just a few microKelvin and superfluid 3He to temperatures approaching 80 microKelvin. We have built the world's coldest dilution refrigerator as part of our advanced microKelvin cooling machine.

Our research focusses primarily on the exotic properties of superfluid 3He at ultra-low temperatures. Our record-breaking cooling techniques facilitate experiments on superfluid 3He-B in the ballistic quasiparticle regime where the excitation mean free path is effectively infinite (~ km). We have developed ballistic quasiparticle beam techniques on macroscopic (mm) length scales. We have made direct measurements of Andreev Scattering and have studied dynamic properties of the A-B phase boundary at low temperatures. Recent work has focussed on quantum turbulence in the zero temperature limit.

We also use superfluids as analogue systems to study cosmological phenomena such as the Kibble mechanism for cosmic string creation in the early Universe. 

Teaching and Admin

I have taught various undergraduate courses including matter at low temperatures, statistical physics, low temperature mini-projects, physical systems and various experimental projects. I have been director of studies for several years and I was the director of teaching for undergraduate physics from 2005 to 2010

 

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