Dr Viktor Tsepelin

Reader in Low Temperature Physics

Research Interests

My core speciality is low temperature physics. Research at ultralow temperatures is a critical discipline that has a large impact on society. MRI machines in hospitals, CERN apparatus and prototype quantum computers are available because of low temperature physics. By cooling material down, the thermal motion of atoms and electrons is arrested, revealing the subtle nature of quantum mechanics and associated effects, which are hidden at room temperature. For example, helium gas (4He), used for party balloons and scuba-diving, along with its lighter and much rarer isotope 3He, are the only substances which remain liquid and do not freeze even at absolute zero of temperature. Instead of turning into a solid, 3He and 4He liquids exhibit superfluidity, the ability to flow without dissipation and become motionless (irrotational) with respect to the background stars of the universe. Superfluid 3He is an exotic quantum system (it is made up of three different superfluids called mass-, spin- and orbital-superfluids), and can be used to model many other areas of physics ranging from complex classical systems to cosmology. In my research, I agitate and destroy the superfluid condensate using a variety of mechanical oscillators to learn about processes in the early universe and turbulence.

Low Temperature Physics

Low Temperature Physics

Low Temperature Physics

  • Low Temperature Physics
  • Quantum Technology Centre