Kominis, Yannis; Bountis, Tassos; Flach, Sergej
(Physical Review A, 2017-06-21)
We analyze the stability of a non-Hermitian coupler with respect to modulational inhomogeneous perturbations
in the presence of unbalanced gain and loss. At the parity-time (PT ) symmetry point the coupler is unstable.
Suitable ...