Elementary modes of coupled oscillators with balanced loss and gain
arXiv:1408.5038
Abstract
We obtain the elementary modes of a system of parity-time reversal ( PT ) - symmetric coupled oscillators with balanced loss and gain . These modes are used to give a physical picture of the phase transition recently reported in experiments with whispering - gallery microresonators.
Latex, 5 pages, Minor modifications, to appear in Mod. Phys. Lett. A