Comparison of Spin Force and Bohm Potential Force in Laser Pulse-Magnetized Spin Plasma

Bohm potential and electron spin are very important quantum effects in quantum plasma. In certain circumstances, they may have important influences on the interaction of electromagnetic wave and plasma. In this paper, we make a comparison of spin force and Bohm potential force in Gaussian laser pulse-magnetized quantum plasma, and clarify which force plays the main role under different conditions. It is shown that for long Gaussian pulse, which force will prevail depends on the ratio of lambda(2)(p)/ L-p(2) and the normalized potential a. And for short Gaussian pulse, if a < 0.2, the Bohm potential force is greater than the spin force, and if a > 0.2, the spin force will dominate the Bohm potential force.