Momentum relaxation from the fluid/gravity correspondence

Understand

We provide a hydrodynamical description of a holographic theory with broken translation invariance.

• We use the fluid/gravity correspondence to systematically obtain both the constitutive relations for the currents and the Ward identity for momentum relaxation in a derivative expansion.
• Beyond leading order in the strength of momentum relaxation, our results differ from a model previously proposed by Hartnoll et al.
• As an application of these techniques we consider charge and heat transport in the boundary theory.