implication of quantum effects on non-linear propagation of electron plasma solitons

We have studied the electron exchange-correlation effect on the characteristics of the two-component unmagnetized dense quantum plasma with streaming motion. for this purpose, we have used the quantum hydrodynamic model (including the effects of a quantum statistical fermi electron temperature) for studying the propagation of an electrostatic electron plasma waves in such that plasma consisting of quantum electrons and immobile ions. it is found that by regarding the latter effect, it possible the excitation of two distinct modes. some different cases such as: unmagnetized, collisionless, classical cases and some formulas presented and discussed. by using the reduced quantum hydrodynamic (qhd) model, the korteweg de vries (kdv) equation incorporating the electron exchange-correlation effect is derived. it was shown that the electron exchange-correlation phenomenon on the main quantities for both rarefactive and compressive types of solitary-wave propagation can be important. in particular, the arbitrary amplitude of electron solitary-wave experiences a spreading as the effect of exchange-correlation becomes effective. variations of the width of the electron solitary wave for different plasma values were depicted. it was shown that by increasing the exchange values, the width of soliton decrease.