Passive $\mathcal{P}\mathcal{T}$-symmetry breaking transitions without exceptional points in dissipative photonic systems

Yogesh N. Joglekar, Andrew K. Harter

Over the past decade, parity-time ($\mathcal{P}\mathcal{T}$)-symmetric Hamiltonians have been experimentally realized in classical, optical settings with balanced gain and loss, or in quantu…