Stable localized modes in asymmetric waveguides with gain and loss
Tsoy E.N., Allayarov I.M., Abdullaev F.Kh. Stable localized modes in asymmetric waveguides with gain and loss. // OPTICS LETTERS. July 15, 2014 / V. 39. No.14.
Different models of coupled oscillators with parity-time (PT) symmetry are studied. Hamiltonian functions for two and three linear oscillators coupled via coordinates and accelerations are derived. Regions of stable dynamics for two coupled oscillators are obtained. It is found that in some cases, an increase of the gain-loss parameter can stabilize the system. A family of Hamiltonians for two coupled nonlinear oscillators with PT-symmetry is obtained. An extension to high-dimensional PT-symmetric systems is discussed.Download