Solutions to the Maxwell-Bloch equations for a $Lambda$ system are computed using the single-soliton Darboux transformation and the nonlinear superposition principle. These allow complete control of information deposited by a signal pulse (with the help of an auxiliary control pulse) in the coherence of the mediums ground states by injecting sub-sequential pulses. Additionally, we study the encoding of two signal pulses and their manipulation by a control pulse and show that multipulse storage and control are possible as long as the imprints made by encoding the signal pulses are sufficiently separated.
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