Control of exciton dynamics in nanodots for quantum operations - art. no. 067401

We present a theory to further a new perspective of proactive control of ex citon dynamics in the quantum limit. Circularly polarized optical pulses in a semiconductor nanodot are used to control the dynamics of two interactin g excitons of opposite polarizations. Shaping of femtosecond laser pulses k eeps the quantum operation within the decoherence time. Computation of the fidelity of the operations and application to the complete solution of a mi nimal quantum computing algorithm demonstrate in theory the feasibility of quantum control.