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Quantum Information Processing
Erschienen in: Quantum Information Processing 1/2020

01.01.2020

Optically controlled quantum gates for three spin qubits in quantum dot–microcavity coupled systems

verfasst von: Nam-Chol Kim, Song-Il Choe, Myong-Chol Ko, Ju-Song Ryom, Nam-Chol Ho

Erschienen in: Quantum Information Processing | Ausgabe 1/2020

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Abstract

We investigate theoretically the possibility of achieving feasible solid-state quantum computing by compactly constructing a set of two or three quantum gates on stationary electron spin qubits, including the controlled NOT gate, Toffoli gate and Fredkin gate. In our schemes, both of the target qubits and control qubits are all encoded on the confined electron spins in quantum dots embedded in optical microcavities with two partially reflective mirrors. In this paper, the schemes are based on spin selective photon reflection from the microcavity and are achieved in deterministic ways by the sequential detection of the auxiliary photons. The feasibilities of the proposed schemes are estimated by high average fidelities of the gates which are achievable in both the weak coupling and the strong coupling regimes. Under the present technology, our proposed schemes are feasible, opening the promising perspectives for constructing a solid-state quantum computation and quantum information processing.
Vorheriger Artikel Quantum Lyapunov control with machine learning
Nächster Artikel Multiphoton process in cavity QED photons for implementing a three-qubit quantum gate operation

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Metadaten
Titel
Optically controlled quantum gates for three spin qubits in quantum dot–microcavity coupled systems
verfasst von
Nam-Chol Kim
Song-Il Choe
Myong-Chol Ko
Ju-Song Ryom
Nam-Chol Ho
Publikationsdatum
01.01.2020
Verlag
Springer US
Erschienen in
Quantum Information Processing / Ausgabe 1/2020
Print ISSN: 1570-0755
Elektronische ISSN: 1573-1332
DOI
https://doi.org/10.1007/s11128-019-2497-x

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