Rotons, Superfluidity, and Helium Crystals

@inproceedings{Balibar2006RotonsSA,
  title={Rotons, Superfluidity, and Helium Crystals},
  author={S{\'e}bastien Balibar},
  year={2006}
}
Fritz London understood that quantum mechanics could show up at the macroscopic level, and, in 1938, he proposed that superfluidity was a consequence of Bose‐Einstein condensation. However, Lev Landau never believed in London’s ideas; instead, he introduced quasiparticles to explain the thermodynamics of superfluid 4He and a possible mechanism for its critical velocity. One of these quasiparticles, a crucial one, was his famous “roton” which he considered as an elementary vortex. At the LT0… CONTINUE READING

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