Holographic Bjorken flow at large-D

A bstract We use gauge/gravity duality to study the dynamics of strongly coupled gauge theories undergoing boost invariant expansion in an arbitrary number of space-time dimensions ( D ). By keeping the scale of the late-time energy density fixed, we explore the infinite- D limit and study the first few corrections to this expansion. In agreement with other studies, we find that the large- D dynamics are controlled by hydrodynamics and we use our computation to constrain the leading large- D dependence of a certain combination of transport coefficients up to 6 th order in gradients. Going beyond late time physics, we discuss how non-hydrodynamic modes appear in the large- D expansion in the form of a trans-series in D , identical to the non-perturbative contributions to the gradient expansion. We discuss the consequence of this trans-series in the non-convergence of the large- D expansion.