Quantum-information processing in semiconductor quantum dots

We propose an all-optical implementation of quantum-information processing in semiconductor quantum dots, where electron-hole excitations (excitons) s erve ve as the computational degrees of freedom (qubits). The strong dot co nfinement leads to a strong renormalization of excitonic states, which, in analogy to NMR:based implementations of quantum-information processing, can be exploited for performing conditional and unconditional qubit operations .