Novel Parity Violating Transport Coefficients in 2+1 Dimensions from Holography

Understand

We construct a 3+1 dimensional holographic model dual to a parity violating hydrodynamic system in 2+1 dimensions.

• Our model contains gravitational and electrodynamic Chern-Simons terms coupled to a neutral pseudo scalar $\theta$, and a potential composed of quadratic and quartic terms in $\theta$.
• The background is a charged black brane.
• We study the hydrodynamics to first order in spacetime derivatives near the probe limit of the pseudo scalar, by extracting the transport coefficients from the scalar, vector, and tensor modes of bulk perturbations.