Avron J., Seiler R., Zograf P.
Viscosity of Quantum Hall Fluids
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ABSTRACT. The viscosity of quantum fluids with an energy gap at zero temperature is
non-dissipative and is related to the adiabatic curvature on the space of
flat background metrics (which plays the role of the parameter space).
For a quantum Hall fluid on two dimensional tori this viscosity is computed.
In this case the average viscosity is quantized and is proportional to
the total magnetic flux through the torus.