  In recent years polymer translocation, i.e., transport of polymeric molecules
through nanometer-sized pores and channels embedded in membranes, has witnessed
strong advances. It is now possible to observe single-molecule polymer dynamics
during the motion through channels with unprecedented spatial and temporal
resolution. These striking experimental studies have stimulated many
theoretical developments. In this short theory-experiment review, we discuss
recent progress in this field with a strong focus on non-equilibrium aspects of
polymer dynamics during the translocation process.
