Abstract
A nonlocal nonlinear Schr¨odinger (NNLS) equation with fourth-order
dispersion and cubic-quintic nonlinearities has been studied analytically and numeri-
cally. Under the constraint conditions, auxiliary functions are introduced, and explicit
one- and two-soliton solutions are obtained by the Hirota bilinear method. Accord-
ing to the solutions, the propagation dynamics of soliton pulses are investigated. The
influences of different parameters on the dynamics of one- and two-soliton solutions
have been analyzed. The results show that the two-soliton solution exhibits diverse dy-
namic characteristics under the suitable parameter selections. In addition, the stability
of one- and two-soliton solutions against the constraint conditions deviations and under
the initial perturbations are also studied numerically.
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