  We have developed a Green-Kubo relation that enables accurate calculations of
friction at solid-liquid interfaces directly from equilibrium molecular
dynamics (MD) simulations and that provides a pathway to bypass the time-scale
limitations of typical nonequilibrium MD simulations. The theory has been
validated for a number of different interfaces and it is demonstrated that the
liquid-solid slip is an intrinsic property of an interface. Because of the high
numerical efficiency of our method, it can be used in the design of interfaces
for applications in aqueous environments, such as nano- and microfluidics.
