Dynamics of laser beams in inhomogeneous electron–positron–ion plasmas*
Cheng Li-Hong, Tang Rong-An, Du Hong-E, Xue Ju-Kui†
       
(a) Potential profile of V ( a , ξ ) versus a and ξ in inhomogeneous case for n i 0( ξ ) = 1 + b ξ , b = 0.001, and N = 11. (b) Potential profile of V ( a , ξ ) versus a for different characteristic inhomogeneity parameters b = 0, 0.001, 0.005 at fixed position ξ = 10.