Dmitry Solenov, Sophia E. Economou, T. L. Reinecke
Implementations for quantum computing require fast single- and multi-qubit quantum gate operations. In the case of optically controlled quantum dot qubits long-range two- or multi-qubit operations needed for scalability have not yet been demonstrated. We propose a fast, long-range two-qubit gate mediated by a photonic microcavity mode. This design does not require identical qubits, it is compatible with available optically induced single qubit operations, and it advances opportunities for scalable architectures. We compute the fidelity of the proposed gate operation and show that it can exceed 90% in experimentally accessible systems.
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http://arxiv.org/abs/1204.5206
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