Single-Step High-Fidelity Three-Qubit Gates by Anisotropic Chiral Interactions
Direct multiqubit gates are becoming critical to facilitate quantum computations in near-term devices by reducing the gate counts and circuit depth. Here, we demonstrate that fast and high-fidelity three-qubit gates can be realized in a single step by leveraging small anisotropic and chiral three-qu...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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American Physical Society
2025-08-01
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| Series: | PRX Quantum |
| Online Access: | http://doi.org/10.1103/kp8s-py9m |
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| _version_ | 1849405852894625792 |
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| author | Minh T.P. Nguyen Maximilian Rimbach-Russ Lieven M.K. Vandersypen Stefano Bosco |
| author_facet | Minh T.P. Nguyen Maximilian Rimbach-Russ Lieven M.K. Vandersypen Stefano Bosco |
| author_sort | Minh T.P. Nguyen |
| collection | DOAJ |
| description | Direct multiqubit gates are becoming critical to facilitate quantum computations in near-term devices by reducing the gate counts and circuit depth. Here, we demonstrate that fast and high-fidelity three-qubit gates can be realized in a single step by leveraging small anisotropic and chiral three-qubit interactions. These ingredients naturally arise in state-of-the-art spin-based quantum hardware through a combination of spin-orbit interactions and orbital magnetic fields. These interactions resolve the key synchronization issues inherent in protocols relying solely on two-qubit couplings, which significantly limit gate fidelity. We confirm with numerical simulations that our single-step three-qubit gate can outperform existing protocols, potentially achieving infidelity ≤10^{−4} in 80–100 ns under current experimental conditions. To further benchmark its performance, we also propose an alternative composite three-qubit gate sequence based on anisotropic two-qubit interactions with built-in echo sequence and show that the single-step protocol can outperform it, making it highly suitable for near-term quantum processors. |
| format | Article |
| id | doaj-art-cd836bd0ca66453a97d0dc500bfd2234 |
| institution | Kabale University |
| issn | 2691-3399 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | American Physical Society |
| record_format | Article |
| series | PRX Quantum |
| spelling | doaj-art-cd836bd0ca66453a97d0dc500bfd22342025-08-20T03:36:34ZengAmerican Physical SocietyPRX Quantum2691-33992025-08-016303032610.1103/kp8s-py9mSingle-Step High-Fidelity Three-Qubit Gates by Anisotropic Chiral InteractionsMinh T.P. NguyenMaximilian Rimbach-RussLieven M.K. VandersypenStefano BoscoDirect multiqubit gates are becoming critical to facilitate quantum computations in near-term devices by reducing the gate counts and circuit depth. Here, we demonstrate that fast and high-fidelity three-qubit gates can be realized in a single step by leveraging small anisotropic and chiral three-qubit interactions. These ingredients naturally arise in state-of-the-art spin-based quantum hardware through a combination of spin-orbit interactions and orbital magnetic fields. These interactions resolve the key synchronization issues inherent in protocols relying solely on two-qubit couplings, which significantly limit gate fidelity. We confirm with numerical simulations that our single-step three-qubit gate can outperform existing protocols, potentially achieving infidelity ≤10^{−4} in 80–100 ns under current experimental conditions. To further benchmark its performance, we also propose an alternative composite three-qubit gate sequence based on anisotropic two-qubit interactions with built-in echo sequence and show that the single-step protocol can outperform it, making it highly suitable for near-term quantum processors.http://doi.org/10.1103/kp8s-py9m |
| spellingShingle | Minh T.P. Nguyen Maximilian Rimbach-Russ Lieven M.K. Vandersypen Stefano Bosco Single-Step High-Fidelity Three-Qubit Gates by Anisotropic Chiral Interactions PRX Quantum |
| title | Single-Step High-Fidelity Three-Qubit Gates by Anisotropic Chiral Interactions |
| title_full | Single-Step High-Fidelity Three-Qubit Gates by Anisotropic Chiral Interactions |
| title_fullStr | Single-Step High-Fidelity Three-Qubit Gates by Anisotropic Chiral Interactions |
| title_full_unstemmed | Single-Step High-Fidelity Three-Qubit Gates by Anisotropic Chiral Interactions |
| title_short | Single-Step High-Fidelity Three-Qubit Gates by Anisotropic Chiral Interactions |
| title_sort | single step high fidelity three qubit gates by anisotropic chiral interactions |
| url | http://doi.org/10.1103/kp8s-py9m |
| work_keys_str_mv | AT minhtpnguyen singlestephighfidelitythreequbitgatesbyanisotropicchiralinteractions AT maximilianrimbachruss singlestephighfidelitythreequbitgatesbyanisotropicchiralinteractions AT lievenmkvandersypen singlestephighfidelitythreequbitgatesbyanisotropicchiralinteractions AT stefanobosco singlestephighfidelitythreequbitgatesbyanisotropicchiralinteractions |