Optimisation of electron spin qubits in electrically driven multi-donor quantum dots
Abstract Multi-donor quantum dots have been at the forefront of recent progress in Si-based quantum computation. Among them, 2P: 1P spin qubits have a built-in dipole moment, making them ideal for electron dipole spin resonance (EDSR) using the donor hyperfine interaction, and thus all-electrical sp...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Portfolio
2022-11-01
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| Series: | npj Quantum Information |
| Online Access: | https://doi.org/10.1038/s41534-022-00646-9 |
| _version_ | 1811233642383409152 |
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| author | Abhikbrata Sarkar Joel Hochstetter Allen Kha Xuedong Hu Michelle Y. Simmons Rajib Rahman Dimitrie Culcer |
| author_facet | Abhikbrata Sarkar Joel Hochstetter Allen Kha Xuedong Hu Michelle Y. Simmons Rajib Rahman Dimitrie Culcer |
| author_sort | Abhikbrata Sarkar |
| collection | DOAJ |
| description | Abstract Multi-donor quantum dots have been at the forefront of recent progress in Si-based quantum computation. Among them, 2P: 1P spin qubits have a built-in dipole moment, making them ideal for electron dipole spin resonance (EDSR) using the donor hyperfine interaction, and thus all-electrical spin operation. We report fast EDSR, with T π ~ 10 − 50 ns and a Rabi ratio (T 1/T π ) ~ 106. The fastest EDSR time T π occurs when the 2P: 1P axis is ∥ [111], while the best Rabi ratio occurs when it is ∥ [100]. Sensitivity to random telegraph noise due to nearby charge defects depends strongly on the location of the nearby defects. The qubit is robust against 1/f noise provided it is operated away from the charge anti-crossing. Entanglement via exchange is several orders of magnitude faster than dipole-dipole coupling. These findings pave the way towards fast, low-power, coherent and scalable donor dot-based quantum computing. |
| first_indexed | 2024-04-12T11:23:05Z |
| format | Article |
| id | doaj.art-35860e4f343d4fecb85fc898e34a07bb |
| institution | Directory Open Access Journal |
| issn | 2056-6387 |
| language | English |
| last_indexed | 2024-04-12T11:23:05Z |
| publishDate | 2022-11-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | npj Quantum Information |
| spelling | doaj.art-35860e4f343d4fecb85fc898e34a07bb2022-12-22T03:35:18ZengNature Portfolionpj Quantum Information2056-63872022-11-018111110.1038/s41534-022-00646-9Optimisation of electron spin qubits in electrically driven multi-donor quantum dotsAbhikbrata Sarkar0Joel Hochstetter1Allen Kha2Xuedong Hu3Michelle Y. Simmons4Rajib Rahman5Dimitrie Culcer6School of Physics, The University of New South WalesSchool of Physics, The University of New South WalesSchool of Physics, The University of New South WalesDepartment of Physics, University at Buffalo, SUNYCentre for Quantum Computation and Communication Technology, School of Physics, The University of New South WalesSchool of Physics, The University of New South WalesSchool of Physics, The University of New South WalesAbstract Multi-donor quantum dots have been at the forefront of recent progress in Si-based quantum computation. Among them, 2P: 1P spin qubits have a built-in dipole moment, making them ideal for electron dipole spin resonance (EDSR) using the donor hyperfine interaction, and thus all-electrical spin operation. We report fast EDSR, with T π ~ 10 − 50 ns and a Rabi ratio (T 1/T π ) ~ 106. The fastest EDSR time T π occurs when the 2P: 1P axis is ∥ [111], while the best Rabi ratio occurs when it is ∥ [100]. Sensitivity to random telegraph noise due to nearby charge defects depends strongly on the location of the nearby defects. The qubit is robust against 1/f noise provided it is operated away from the charge anti-crossing. Entanglement via exchange is several orders of magnitude faster than dipole-dipole coupling. These findings pave the way towards fast, low-power, coherent and scalable donor dot-based quantum computing.https://doi.org/10.1038/s41534-022-00646-9 |
| spellingShingle | Abhikbrata Sarkar Joel Hochstetter Allen Kha Xuedong Hu Michelle Y. Simmons Rajib Rahman Dimitrie Culcer Optimisation of electron spin qubits in electrically driven multi-donor quantum dots npj Quantum Information |
| title | Optimisation of electron spin qubits in electrically driven multi-donor quantum dots |
| title_full | Optimisation of electron spin qubits in electrically driven multi-donor quantum dots |
| title_fullStr | Optimisation of electron spin qubits in electrically driven multi-donor quantum dots |
| title_full_unstemmed | Optimisation of electron spin qubits in electrically driven multi-donor quantum dots |
| title_short | Optimisation of electron spin qubits in electrically driven multi-donor quantum dots |
| title_sort | optimisation of electron spin qubits in electrically driven multi donor quantum dots |
| url | https://doi.org/10.1038/s41534-022-00646-9 |
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