Stability of solitons in parity-time-symmetric couplers.

@article{Driben2011StabilityOS,
  title={Stability of solitons in parity-time-symmetric couplers.},
  author={Rodislav Driben and Boris A. Malomed},
  journal={Optics letters},
  year={2011},
  volume={36 22},
  pages={
          4323-5
        }
}
Families of analytical solutions are found for symmetric and antisymmetric solitons in a dual-core system with Kerr nonlinearity and parity-time (PT)-balanced gain and loss. The crucial issue is stability of the solitons. A stability region is obtained in an analytical form, and verified by simulations, for the PT-symmetric solitons. For the antisymmetric ones, the stability border is found in a numerical form. Moving solitons of both types collide elastically. The two soliton species merge… 
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