图4. (a) 在距离栅格 $20M\sim40 M$ 范围内,两个粒子对的相对距离平方 $\langle (R(t)-R_0)^2 \rangle $ 随着时 间的关系. 不同的颜色代表不同的初始距离 $R_0$. 子图的黑色直线为 $(t/\tau_{\rm F})^2$,并不是数据拟合曲线. (b) 考虑 VASF 对相对距离的影响后,补偿的弥散关系

Fig.4. (a) In the region which lies in $20M\sim40 M$ below the comb, the dispersion relationship of two particles $\langle (R(t)-R_0)^2 \rangle $ with time. Different colors correspond to different initial separations $R_0$. The black line in sub-figure is $(t/\tau_{\rm F})^2$, which is not the fitting curve. (b) Considering the effect of VASF, the compensated dispersion relationships