Dynamical evolution of optical solitons in the (1+1)-dimensional quintic-septimal media with PT-symmetric potentials

The (1+1)-dimensional constant-coefficient and variable-coefficient quintic-septimal nonlinear Schrodinger equations with PT-symmetric potentials are studied. Two kinds of explicit soliton solutions for constant-coefficient equation are derived. Based on the one-to-one relation between variable-coefficient and constant-coefficient equations with these solutions of constant-coefficient equation, two kinds of explicit soliton solutions for variable-coefficient equation are obtained. In the homogeneous case, the formation of solitons is decided by the diffraction and septimal nonlinear coefficients. The phase of soliton exists a jump from the negative to positive values at the position of center.