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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2503.16663 |
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| _version_ | 1866917964457967616 |
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| author | Banks, Robert J. Feinstein, Natasha Ghosh, Roopayan Bose, Sougato Warburton, P. A. |
| author_facet | Banks, Robert J. Feinstein, Natasha Ghosh, Roopayan Bose, Sougato Warburton, P. A. |
| contents | In certain scenarios, quantum annealing can be made more efficient by additional $XX$ interactions. It has been shown that the additional interactions can reduce the scaling of perturbative crossings. In traditional annealing devices these couplings do not exist natively. In this work, we develop two gadgets to achieve this: a three-body gadget that requires a strong $ZZZ$ interaction; and a one-hot gadget that uses only local $X$ drives and two-body $ZZ$ interactions. The gadgets partition the Hilbert space to effectively generate a limited number of $XX$ interactions in the low-energy subspace. We numerically verify that the one-hot gadget can mitigate a perturbative crossing on a toy problem. These gadgets establish new pathways for implementing and exploiting $XX$ interactions, enabling faster and more robust quantum annealing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_16663 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Gadgets for simulating a non-native $XX$ interaction in quantum annealing Banks, Robert J. Feinstein, Natasha Ghosh, Roopayan Bose, Sougato Warburton, P. A. Quantum Physics In certain scenarios, quantum annealing can be made more efficient by additional $XX$ interactions. It has been shown that the additional interactions can reduce the scaling of perturbative crossings. In traditional annealing devices these couplings do not exist natively. In this work, we develop two gadgets to achieve this: a three-body gadget that requires a strong $ZZZ$ interaction; and a one-hot gadget that uses only local $X$ drives and two-body $ZZ$ interactions. The gadgets partition the Hilbert space to effectively generate a limited number of $XX$ interactions in the low-energy subspace. We numerically verify that the one-hot gadget can mitigate a perturbative crossing on a toy problem. These gadgets establish new pathways for implementing and exploiting $XX$ interactions, enabling faster and more robust quantum annealing. |
| title | Gadgets for simulating a non-native $XX$ interaction in quantum annealing |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2503.16663 |