Non-equilibrium effective field theory and second sound

@article{Landry2020NonequilibriumEF,
  title={Non-equilibrium effective field theory and second sound},
  author={Michael Landry},
  journal={Journal of High Energy Physics},
  year={2020},
  volume={2021}
}
  • Michael Landry
  • Published 26 August 2020
  • Physics
  • Journal of High Energy Physics
We investigate the phenomenon of second sound in various states of matter from the perspective of non-equilibrium effective field theory (EFT). In particular, for each state of matter considered, we find that at least two (though sometimes multiple) qualitatively different EFTs exist at finite temperature such that there is always at least one EFT with a propagating second-sound wave and at least one with no such second-sound wave. To aid in the construction of these EFTs, we use the method of… 
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