Holographic thermalization in charged dilaton anti-de Sitter spacetime

We study holographic thermalization in spacetimes with a chemical potential and a non-trivial dilaton field. Three non-local observables are used to probe the whole process and investigate the effect of the ratio of the chemical potential over temperature χ and the dilaton-Maxwell coupling constant α . It is found that the saturation time is not always a monotonically increasing function of χ , the situation depends on α . When 0≤α≤1 , larger χ yields longer saturation time, while for α>1 , the situation becomes more complex. More interesting, we found that although α indeed has influence on the whole thermalization process, it nearly does not affect the saturation time, which indicates the universality of the saturation time for the dual one-parameter field theories