Four-body coupler for superconducting qubits based on Josephson parametric oscillators
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arXiv
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| Auteurs principaux: | , |
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866918071678009344 |
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| author | Miyazaki, Ryoji Yamamoto, Tsuyoshi |
| author_facet | Miyazaki, Ryoji Yamamoto, Tsuyoshi |
| contents | We theoretically propose a circuit of the four-body coupler for superconducting qubits based on Josephson parametric oscillators (JPOs). Our coupler for the four-body interaction has a superconducting loop, similar to a capacitively shunted flux qubit, where an external magnetic flux set to half a flux quantum is threaded. This coupler circuit is a specific setup of the circuit called superconducting nonlinear asymmetric inductive elements (SNAIL) and also is a generalization of the previously proposed one for the four-body interaction of JPOs. We clarify roles of circuit parameters in the four-body interaction and, in particular, show that the four-body coupling constant in our circuit can be significantly increased by tuning capacitance of the coupler or the area ratio of the Josephson junctions of the coupler. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2501_03578 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Four-body coupler for superconducting qubits based on Josephson parametric oscillators Miyazaki, Ryoji Yamamoto, Tsuyoshi Quantum Physics We theoretically propose a circuit of the four-body coupler for superconducting qubits based on Josephson parametric oscillators (JPOs). Our coupler for the four-body interaction has a superconducting loop, similar to a capacitively shunted flux qubit, where an external magnetic flux set to half a flux quantum is threaded. This coupler circuit is a specific setup of the circuit called superconducting nonlinear asymmetric inductive elements (SNAIL) and also is a generalization of the previously proposed one for the four-body interaction of JPOs. We clarify roles of circuit parameters in the four-body interaction and, in particular, show that the four-body coupling constant in our circuit can be significantly increased by tuning capacitance of the coupler or the area ratio of the Josephson junctions of the coupler. |
| title | Four-body coupler for superconducting qubits based on Josephson parametric oscillators |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2501.03578 |