Fast two-qubit gates for quantum computing in semiconductor quantum dots using a photonic microcavity

Implementations for quantum computing require fast single- and multiqubit quantum gate operations. In the case of optically controlled quantum dot qubits, theoretical designs for long-range two- or multiqubit operations satisfying all the requirements in quantum computing are not yet available. We h...

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Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2013-01, Vol.87 (3), Article 035308
Main Authors: Solenov, Dmitry, Economou, Sophia E., Reinecke, T. L.
Format: Article
Language:English
Subjects:
Condensed matter
Design engineering
Gates
Microcavities
Photonics
Quantum computing
Qubits (quantum computing)
Qunatum dots
Semiconductors
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Summary:Implementations for quantum computing require fast single- and multiqubit quantum gate operations. In the case of optically controlled quantum dot qubits, theoretical designs for long-range two- or multiqubit operations satisfying all the requirements in quantum computing are not yet available. We have developed a design for a fast, long-range two-qubit gate mediated by a photonic microcavity mode using excited states of the quantum-dot-cavity system that addresses these needs. 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 show that the gate fidelity can exceed 90% in experimentally accessible systems.
ISSN:1098-0121
1550-235X
DOI:10.1103/PhysRevB.87.035308