Solitons in PT-symmetric nonlinear lattices
  Existence of localized modes supported by the PT-symmetric nonlinear lattices is reported. The system considered reveals unusual properties: unlike other typical dissipative systems it possesses families (branches) of solutions, which can be parametrized by the propagation constant; relatively narrow localized modes appear to be stable, even when the conservative nonlinear lattice potential is absent; finally, the system supports stable multipole solutions. 
Fatkhulla Kh. Abdullaev, Yaroslav V. Kartashov, Vladimir V. Konotop,   and Dmitry A. Zezyulin
nlin.PS physics.optics