Fast Two-Qubit Gates in Semiconductor Quantum Dots using a Photonic Microcavity

Details Fast Two-Qubit Gates in Semiconductor Quantum Dots using a Photonic Microcavity Fast Two-Qubit Gates in Semiconductor Quantum Dots using a Photonic Microcavity

2012-04-23

arxiv.org/abs/1204.5206v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

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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