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Long-Range Interaction Enhanced Adiabatic Quantum Computers |
| Anqi Shi , Haoyu Guan , Jun Zhang , and Wenxian Zhang* |
| School of Physics and Technology, Wuhan University, Wuhan 430072, China |
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| Cite this article: |
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Anqi Shi , Haoyu Guan , Jun Zhang et al 2020 Chin. Phys. Lett. 37 120301 |
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Abstract A quantum computer is not necessarily alone, e.g., thousands and millions of quantum computers are simultaneously working together for adiabatic quantum computers based on nuclear spins. Long-range interaction is inevitable between these nuclear spin qubits. Here we investigate the effect of long-range dipolar interaction between different adiabatic quantum computers. Our analytical and numerical results show that the dipolar interaction can enhance the final fidelity in adiabatic quantum computation for solving the factorization problem, when the overall interaction is negative. The enhancement will become more prominent if a single quantum computer encounters an extremely small energy gap which occurs more likely for larger-size systems.
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Received: 17 September 2020
Published: 08 December 2020
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| PACS: |
03.65.-w
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(Quantum mechanics)
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03.67.-a
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(Quantum information)
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03.67.Lx
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(Quantum computation architectures and implementations)
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| Fund: Supported by the National Natural Science Foundation of China (Grant Nos. U1930201, 11574239 and 91836101). |
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