${\mathscr{P}}{\mathscr{T}}$-symmetry breaking in the steady state of microscopic gain–loss systems
${\mathscr{P}}{\mathscr{T}}$-symmetry breaking in the steady state of microscopic gain–loss systems
The phenomenon of PT (parity- and time-reversal) symmetry breaking is conventionally associated with a change in the complex mode spectrum of a non-Hermitian system that marks a transition from a purely oscillatory to an exponentially amplified dynamical regime. In this work we describe a new type of PT-symmetry breaking, which …