Transport signatures of Hall viscosity

Understand

Hall viscosity is a non-dissipative response function describing momentum transport in two-dimensional systems with broken parity.

• It is quantized in the quantum Hall regime, and contains information about the topological order of the quantum Hall state.
• Hall viscosity can distinguish different quantum Hall states with identical Hall conductances, but different topological order.
• To date, an experimentally accessible signature of Hall viscosity is lacking.