Fluctuation-induced Nambu–Goldstone bosons in a Higgs–Josephson model

@article{Yanagisawa2014FluctuationinducedNB,
  title={Fluctuation-induced Nambu–Goldstone bosons in a Higgs–Josephson model},
  author={Takashi Yanagisawa and Yasumoto Tanaka},
  journal={New Journal of Physics},
  year={2014},
  volume={16},
  pages={123014}
}
We present a new mechanism of fluctuation-induced Nambu–Goldstone bosons in a scalar field theory of Higgs–Josephson systems. We consider a simple scalar field model with rotational symmetry. When there is an interaction which violates the rotational symmetry, the Nambu–Goldstone bosons become massive and massless bosons are concealed. We present a model where the massive boson becomes a massless boson as a result of the perturbative fluctuation. In our model the -symmetry associated with the… 
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