Optically driven nanostructures as the base for the large-scale quantum computing

摘要

We propose a large-scale quantum computer architecture based upon the regular arrays of dopant atoms im-planted into the semiconductor host matrix. The singly-ionized pairs of donors represent charge qubits on whicharbitrary quantum operations can be achieved by application of two strongly detuned laser pulses. The im-plementation of two-qubit operations as well as the qubit read-out utilize the intermediate circuit containing aprobe electron that is able to shuttle along the array of ionized ancilla donors providing the indirect conditionalcoupling between the qubits. The quantum bus strategy enables us to handle the qubits connected in paralleland enhances the efficiency of the quantum information processing. We demonstrate that non-trivial multi-qubitoperations in the quantum register (e.g., an entanglement generation) can be accomplished by the sequence ofthe optical pulses combined with an appropriate voltage gate pattern.