  We propose a quantum interface which applies multiple passes of a pulse of
light through an atomic sample with phase/polarization rotations in between the
passes. Our proposal does not require nonclassical light input or measurements
on the system, and it predicts rapidly growing unconditional entanglement of
light and atoms from just coherent inputs. The proposed interface makes it
possible to achieve a number of tasks within quantum information processing
including teleportation between light and atoms, quantum memory for light and
squeezing of atomic and light variables.
