Hall viscosity from gauge/gravity duality

Understand

In (2+1)-dimensional systems with broken parity, there exists yet another transport coefficient, appearing at the same order as the shear viscosity in the hydrodynamic derivative expansion.

• In condensed matter physics, it is referred to as "Hall viscosity".
• We consider a simple holographic realization of a (2+1)-dimensional isotropic fluid with broken spatial parity.
• Using techniques of fluid/gravity correspondence, we uncover that the holographic fluid possesses a nonzero Hall viscosity, whose value only depends on the near-horizon region of the background.