Toward higher-spin symmetry breaking in the bulk

Abstract

We present a new vacuum of the bosonic higher-spin gauge theory in $d+1$ dimensions, which has leftover symmetry of the Poincar\'{e} algebra in $d$ dimensions. Its structure is very simple: the space-time geometry is that of $AdS$, while the only nonzero field is a scalar. The scalar extends along the Poincar\'{e} radial coordinate $z$ and is shown to be linearly exact for an arbitrary mixture of its two $\Delta=2$ and $\Delta=d-2$ conformal branches. The obtained vacuum breaks the global higher-spin symmetry leading to a broken phase that lives in the Minkowski space-time.