Fluctuation-induced Nambu-Goldstone bosons in a Higgs-Josephson model
Superconductivity
2015-06-23 v2 High Energy Physics - Phenomenology
Abstract
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 chirality is also broken. The transition occurs as a (weak) first-order transition at the critical point. The ground state at absolute zero will flow into the state with more massless bosons due to fluctuation effects at finite temperature.
Cite
@article{arxiv.1411.0214,
title = {Fluctuation-induced Nambu-Goldstone bosons in a Higgs-Josephson model},
author = {Takashi Yanagisawa and Yasumoto Tanaka},
journal= {arXiv preprint arXiv:1411.0214},
year = {2015}
}