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Superfluid properties of electron-hole pairs in a quantum Hall four-layersystem are investigated. The system is considered as a solid state realizationof a two-component superfluid Bose gas with dipole-dipole interaction. Onesuperfluid component is formed in the top bilayer and the other component - inthe bottom one. We obtain the dispersion equation for the collective modespectrum and compute the critical parameters (the critical interlayer distanceand the critical currents) versus the filling factor. We find that the criticalcurrents of the components depend on each other. The maximum critical currentof a given component can be reached if the current of the other component isequal to zero. The non-dissipative drag effect between the components isstudied. It is shown that in the system considered the drag factor is verylarge. Under appropriate conditions it can be about 10 per sent, that is atleast in three order larder than one predicted for two-component atomic Bosegases.

Critical currents and giant non-dissipative drag for superfluid electron-hole pairs in quantum Hall multilayers