Ground-state energies of Ising models calculated using the samples from a quantum computer that simulates short-time evolution
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866914514432163840 |
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| author | Stenger, John P. T. Hellberg, C. Stephen Gunlycke, Daniel |
| author_facet | Stenger, John P. T. Hellberg, C. Stephen Gunlycke, Daniel |
| contents | We find the ground-state energy of the Ising model using the Cascaded Variational Quantum Eigensolver (CVQE) algorithm with the Guided-Sampling Ansatz (GSA) using up to 63 qubits on a quantum computer. We study a heavy-hex lattice to match the qubit architecture, allowing us to perform calculations in the quantum utility regime. We study both a homogeneous and random-coupling model. We locate the boundary of acceptable quantum errors as a function of the number of qubits and coupling strength. An entropic analysis is performed giving insights into the quantum computing performance. A subspace analysis is performed that suggests that the Ising model is especially suited for near-term quantum computing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_25715 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Ground-state energies of Ising models calculated using the samples from a quantum computer that simulates short-time evolution Stenger, John P. T. Hellberg, C. Stephen Gunlycke, Daniel Quantum Physics We find the ground-state energy of the Ising model using the Cascaded Variational Quantum Eigensolver (CVQE) algorithm with the Guided-Sampling Ansatz (GSA) using up to 63 qubits on a quantum computer. We study a heavy-hex lattice to match the qubit architecture, allowing us to perform calculations in the quantum utility regime. We study both a homogeneous and random-coupling model. We locate the boundary of acceptable quantum errors as a function of the number of qubits and coupling strength. An entropic analysis is performed giving insights into the quantum computing performance. A subspace analysis is performed that suggests that the Ising model is especially suited for near-term quantum computing. |
| title | Ground-state energies of Ising models calculated using the samples from a quantum computer that simulates short-time evolution |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2604.25715 |