Analysis and mitigation of residual exchange coupling in linear spin-qubit arrays
In recent advancements of quantum computing utilizing spin qubits, it has been demonstrated that this platform possesses the potential for implementing two-qubit gates with fidelities exceeding 99.5%. However, as with other qubit platforms, it is not feasible to completely turn qubit couplings off....
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2024-02-01
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| Series: | Physical Review Research |
| Online Access: | http://doi.org/10.1103/PhysRevResearch.6.013153 |
| _version_ | 1827285049939066880 |
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| author | Irina Heinz Adam R. Mills Jason R. Petta Guido Burkard |
| author_facet | Irina Heinz Adam R. Mills Jason R. Petta Guido Burkard |
| author_sort | Irina Heinz |
| collection | DOAJ |
| description | In recent advancements of quantum computing utilizing spin qubits, it has been demonstrated that this platform possesses the potential for implementing two-qubit gates with fidelities exceeding 99.5%. However, as with other qubit platforms, it is not feasible to completely turn qubit couplings off. This study aims to investigate the impact of coherent error matrices in gate set tomography by employing a double quantum dot. We evaluate the infidelity caused by residual exchange between spins and compare various mitigation approaches, including the use of adjusted timing through simple drives, considering different parameter settings in the presence of charge noise. Furthermore, we extend our analysis to larger arrays of exchange-coupled spin qubits to provide an estimation of the expected fidelity. In particular, we demonstrate the influence of residual exchange on a single-qubit Y gate and the native two-qubit SWAP gate in a linear chain. Our findings emphasize the significance of accounting for residual exchange when scaling up spin-qubit devices and highlight the tradeoff between the effects of charge noise and residual exchange in mitigation techniques. |
| first_indexed | 2024-04-24T10:07:32Z |
| format | Article |
| id | doaj.art-92d854977ef84bfab52f27f5cd464d23 |
| institution | Directory Open Access Journal |
| issn | 2643-1564 |
| language | English |
| last_indexed | 2024-04-24T10:07:32Z |
| publishDate | 2024-02-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | Physical Review Research |
| spelling | doaj.art-92d854977ef84bfab52f27f5cd464d232024-04-12T17:39:05ZengAmerican Physical SocietyPhysical Review Research2643-15642024-02-016101315310.1103/PhysRevResearch.6.013153Analysis and mitigation of residual exchange coupling in linear spin-qubit arraysIrina HeinzAdam R. MillsJason R. PettaGuido BurkardIn recent advancements of quantum computing utilizing spin qubits, it has been demonstrated that this platform possesses the potential for implementing two-qubit gates with fidelities exceeding 99.5%. However, as with other qubit platforms, it is not feasible to completely turn qubit couplings off. This study aims to investigate the impact of coherent error matrices in gate set tomography by employing a double quantum dot. We evaluate the infidelity caused by residual exchange between spins and compare various mitigation approaches, including the use of adjusted timing through simple drives, considering different parameter settings in the presence of charge noise. Furthermore, we extend our analysis to larger arrays of exchange-coupled spin qubits to provide an estimation of the expected fidelity. In particular, we demonstrate the influence of residual exchange on a single-qubit Y gate and the native two-qubit SWAP gate in a linear chain. Our findings emphasize the significance of accounting for residual exchange when scaling up spin-qubit devices and highlight the tradeoff between the effects of charge noise and residual exchange in mitigation techniques.http://doi.org/10.1103/PhysRevResearch.6.013153 |
| spellingShingle | Irina Heinz Adam R. Mills Jason R. Petta Guido Burkard Analysis and mitigation of residual exchange coupling in linear spin-qubit arrays Physical Review Research |
| title | Analysis and mitigation of residual exchange coupling in linear spin-qubit arrays |
| title_full | Analysis and mitigation of residual exchange coupling in linear spin-qubit arrays |
| title_fullStr | Analysis and mitigation of residual exchange coupling in linear spin-qubit arrays |
| title_full_unstemmed | Analysis and mitigation of residual exchange coupling in linear spin-qubit arrays |
| title_short | Analysis and mitigation of residual exchange coupling in linear spin-qubit arrays |
| title_sort | analysis and mitigation of residual exchange coupling in linear spin qubit arrays |
| url | http://doi.org/10.1103/PhysRevResearch.6.013153 |
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