Dirlan J. C. de Morais Sousa

Gouy Phase across PT-Symmetry Breaking in Non-Hermitian Dirac Systems

We study relativistic beam-like wave packets governed by a quasi-Hermitian massive Dirac Hamiltonian and uncover anomalous Gouy-phase behavior in non-Hermitian dynamics. We show that the Gouy phase provides a sensitive probe of the global $\mathcal{PT}$-symmetry-breaking threshold: it remains purely real in the globall...