In-Medium Effects in the Holographic Quark-Gluon Plasma

Figure 22

Contour plots of the spectral function for the mode 𝑌 around 𝔴=0 in the complex 𝔴-plane. The density increases from (a) at subcritical density to (c) at supercritical density. Here, the pole in the upper half plane introduces an instability.

(a)

(b)

(c)