Hydrodynamic interaction of two spherically symmetric polymers

We evaluate the complete diffusion matrix describing the translation and rotation of two spherically symmetric polymers in hydrodynamic interaction in a viscous fluid. Explicit results in terms of a series expansion in inverse powers of the distance l between centers is obtained by a method of reflections. Recently derived Faxén theorems allow direct calculation of the diffusion matrix, rather than its inverse the friction matrix. The results can be easily compared with those for hard spheres with mixed slip-stick boundary conditions.