Quantum computing with defects
Identifying and designing physical systems for use as qubits, the basic units of quantum information, are critical steps in the development of a quantum computer. Among the possibilities in the solid state, a defect in diamond known as the nitrogen-vacancy (NV⁻¹) center stands out for its robustness...
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| Veröffentlicht in: | Proceedings of the National Academy of Sciences - PNAS 2010-05, Vol.107 (19), p.8513-8518 |
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| container_issue | 19 |
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| container_title | Proceedings of the National Academy of Sciences - PNAS |
| container_volume | 107 |
| creator | Weber, J.R Koehl, W.F Varley, J.B Janotti, A Buckley, B.B Van de Walle, C.G Awschalom, D.D |
| description | Identifying and designing physical systems for use as qubits, the basic units of quantum information, are critical steps in the development of a quantum computer. Among the possibilities in the solid state, a defect in diamond known as the nitrogen-vacancy (NV⁻¹) center stands out for its robustness--its quantum state can be initialized, manipulated, and measured with high fidelity at room temperature. Here we describe how to systematically identify other deep center defects with similar quantum-mechanical properties. We present a list of physical criteria that these centers and their hosts should meet and explain how these requirements can be used in conjunction with electronic structure theory to intelligently sort through candidate defect systems. To illustrate these points in detail, we compare electronic structure calculations of the NV⁻¹ center in diamond with those of several deep centers in 4H silicon carbide (SiC). We then discuss the proposed criteria for similar defects in other tetrahedrally coordinated semiconductors. |
| doi_str_mv | 10.1073/pnas.1003052107 |
| format | Article |
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| source | Jstor Complete Legacy; PubMed Central; Alma/SFX Local Collection; Free Full-Text Journals in Chemistry |
| subjects | Anions Atoms Defects Electronic structure Electronics Electrons Energy Impurities Nitrogen Optical transition Orbitals Physical properties Physical Sciences Quantum computers Quantum theory Semiconductors Silicon carbide |
| title | Quantum computing with defects |
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