We investigate the impact of many-body interactions on group-velocity slowdown achieved via electromagnetically induced transparency in quantum dots using three different coupling-probe schemes ͑ladder, V, and ⌳, respectively͒. We find that for all schemes many-body interactions have an important impact on the slow light properties. In the case of the ⌳ and V schemes, the minimum required coupling power to achieve slow light is significantly reduced by many-body interactions. V type schemes are found to be generally preferable due to a favorable redistribution of carriers in energy space.

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