D. G. Tedesco

Linear Response in the $\mathcal{PT}$-Broken Phase: Conductivity of Fermions with Complex Conjugate Masses

We examine the linear response of the $\PT$-broken phase of a BRST invariant model whose fermion masses form the complex conjugate pair $m_{\pm}=N\pm iav$. It splits into two channels, kept apart by an exact $\mathbb{Z}_{2}$, and one Euclidean correlator decides both. In the diagonal channel it oscillates in Euclidean...