Spontaneously broken spacetime symmetries and the role of inessential Goldstones
Spontaneously broken spacetime symmetries and the role of inessential Goldstones
In contrast to internal symmetries, there is no general proof that the coset construction for spontaneously broken spacetime symmetries leads to universal dynamics. One key difference lies in the role of Goldstone bosons, which for spacetime symmetries includes a subset which are inessential for the non-linear realisation and hence can …