Effect of power-law nonlinearity on PT-symmetric optical system with fourth-order diffraction  

作　　者：Nathan N Tchepemen Camus G L Tiofack Alidou Mohamadou 

机构地区：[1]Pure Physics Laboratory,Group of Nonlinear Physics and Complex Systems,Department of Physics,Faculty of science,University of Douala,PO Box 24157,Douala,Cameroon [2]Condensed Matter Laboratory,Department of Physics,Faculty of Science,University of Maroua,PO Box 814,Maroua,Cameroon [3]Centre d'Excellence Africain des Technologies de l'Information et de la Communication(CETIC),University of Yaounde I,Cameroon [4]The Abdus Salam International Centre for Theoretical Physics,PO Box 538,Strada costiera 11,I-34014,Trieste,Italy

出　　处：《Communications in Theoretical Physics》2020年第5期32-40,共9页理论物理通讯（英文版）

摘　　要：Gaussian-type soliton solutions of the nonlinear Schr?dinger(NLS)equation with fourth order dispersion,and power law nonlinearity in the novel parity-time(TP)-symmetric quartic Gaussian potential are derived analytically and numerically.The exact analytical expressions of the solutions are obtained in the first two-dimensional(1D and 2D)power law NLS equations.By means of the linear stability analysis,the effect of power law nonlinearity on the stability of Gauss type solitons in different nonlinear media is carried out.Numerical investigations do confirm the stability of our soliton solutions in both focusing and defocusing cases,specially around the propagation parameters.

关 键 词：TP-symmetric quartic Gaussian potential fourth-order diffraction powerlaw nonlinearity stability Gaussian soliton 

分 类 号：O175.29[理学—数学]