  Dynamic control of a weak quantum probe light pulse for the generation and
quantum manipulations of a stationary multi-color (MC-) light field in a
resonant coherent atomic medium using electromagnetically induced transparency
is proposed. The manipulations have been analyzed based on the analytical
solution of the adiabatic limit in the evolution of MC-light fields resulting
from interaction of the slow probe light with the new fields generated in the
nondegenerate multi-wave mixing scheme. We have found a critical stopping
condition for the MC-light fields where the group velocity of light should
reduce down to zero. Semiclassical dynamics and behavior of specific quantum
correlations of the MC-light fields have been studied in detail for particular
initial quantum states of the probe pulse. The stationary MC-field dynamics are
treated in terms of dark MC-polariton states constructed for the studied
multi-wave mixing processes. We have found the conditions for optimal
manipulation of the MC-light while preserving the delicate quantum correlations
of the initial probe light pulse. The quantum manipulations leading to the
frequency and direction switching of the initial probe light pulse as well as
to the quantum swapping of probe light into the new multi-frequency light
fields have been proposed. The possibilities of the interaction time
lengthening and enhancement of the electric field amplitudes of the stationary
MC-light are also discussed for enhancement of the interactions with weak
quantum fields in the spatially limited media.
