FIGURE 4.

Calculated static density and membrane height correlation functions: 〈n²(q)〉, solid line; 〈h²(q)〉, dashed line. (a) : the correlations diverge at the critical wavevector q_c (Eq. 6), indicated by the vertical dotted line. The limiting values 〈n²(0)〉 (Eq. 14) and 〈n²(∞)〉 (Eq. 15) are shown by the horizontal dotted and dashed-dotted line, respectively. (b) : the density correlations dip for wavevectors q < q_w (Eq. 8), indicated by the vertical dotted line. The height correlations show a monotonous decay, having a crossover from 1/q⁴ to 1/q⁶ behavior around q_w. The limiting value 〈n²(∞)〉 (Eq. 15) is shown by the horizontal dashed-dotted line.