Helium theory


The Helium theory group studies fundamental properties of quantum condensed matter systems using superfluid phases of 3He as the main source of inspiration. The group is in constant collaboration with the experimental Rota Group in planning and conducting experiments and providing the theory for the observed phenomena, which in turn triggers new experiments.

The Helium theory group makes close connection with other areas of physics: cosmology, particle physics, black hole physics, classical and quantum turbulence, superconductivity, physics of topological media including topological insulators and systems exhibiting intrinsic quantum Hall effect, cold gases, magnetism, physics of topological defects, etc.

Members:

Former Members

Research

Some of the research projects on Helium theory are detailed here.

Recent publications:

  1. Klinkhamer, F.R. and Volovik, G.E., "Dark Matter from Dark Energy in q-Theory", JETP Letters, 105, 74-77 (2017). [DOI]
  2. Zhang, K. and Volovik, G.E., "Lifshitz Transitions via the Type-II Dirac and Type-II Weyl Points", JETP Letters, 105, 519-525 (2017). [DOI]

  3. Klinkhamer, F.R., Savelainen, M., and Volovik, G.E., "Relaxation of vacuum energy in q-theory", JETP, 125, 268-277 (2017).

  4. Klinkhamer, F.R. and Volovik, G.E., "Propagating q-field and q-ball solution", Modern Physics Letters A, 32, 1750103 (2017).

  5. Nissinen, J and Volovik, G.E., "Type-III and IV interacting Weyl points", Pis'ma v Zhurnal Éksperimental'noi i Teoreticheskoi Fiziki (JETP Letters), 105, 442-443 (2017).

  6. Niemetz, M., Hänninen, R., and Schoepe, W., "On the Transition from Potential Flow to Turbulence Around a Microsphere Oscillating in Superfluid 4He", Journal of Low Temperature Physics, (2017). [DOI]

  7. Klinkhamer, F.R. and Volovik, G.E., "Dark matter from dark energy in q-theory", JETP Letters/Pis'ma v Zhurnal Éksperimetal'noi i Teoreticheskoi Fiziki, 105, 62-63 (2017).

  8. Autti, S., Dmitriev, V.V., Makinen, J.T., Soldatov, A.A., Volovik, G.E., Yudin, A.N., Zavjalov, V.V., and Eltsov, V.B., "Observation of half-quantum vortices in topological superfluid 3He ", Physical Review Letters, 117, 255301 (2016). [DOI]

  9. Hietala, N., Hänninen R., Salman, H., and Barenghi, C.F., "Leapfrogging Kelvin waves", Physical Review Fluids, 1, 084501 (2016). [DOI]

  10. Klinkhamer, F.R. and Volovik, G.E., "Dynamic cancellation of a cosmological constant and approach to the Minkowski vacuum", International Journal of Modern Physics A, 31, 1650160 (2016). [DOI]

  11. Heikkilä, T.T., and Volovik, G.E., [In Book] Flat bands as a route to high-temperature superconductivity in graphite, Basic Physics of Functionalized Graphite (2016). [DOI]

  12. Klinkhamer, F.R. and Volovik, G.E., "Brane realization of q-theory and the cosmological constant problem", JETP Letters/Pis'ma v Zhurnal Éksperimetal'noi i Teoreticheskoi Fiziki, 103, 711-714 (2016).


Publications