CNOT gates in inductively coupled multi-fluxonium systems
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arXiv
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| Hauptverfasser: | , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866908707621699584 |
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| author | Moreno, Valeria Díaz Dimitrov, Nikola D. Manucharyan, Vladimir E. Vavilov, Maxim G. |
| author_facet | Moreno, Valeria Díaz Dimitrov, Nikola D. Manucharyan, Vladimir E. Vavilov, Maxim G. |
| contents | High-fidelity two-qubit gates have been demonstrated in systems of two fluxonium qubits; however, the realization of scalable quantum processors requires maintaining low error rates in substantially larger architectures. In this work, we analyze a system of four inductively coupled fluxonium qubits to determine the impact of spectator qubits on the performance of a \textsc{cnot} gate. Our results show that spectator-induced errors are strongly suppressed when the transition frequencies of the spectator qubits are sufficiently detuned from those of the active qubits. We identify favorable frequency configurations for the four-qubit chain that yield \textsc{cnot} gate errors below $10^{-4}$ for gate times shorter than 100 ns. Leveraging the locality of the nearest-neighbor coupling, we extrapolate our findings to longer fluxonium chains, suggesting a viable path toward scalable, low-error quantum information processing. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_11756 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | CNOT gates in inductively coupled multi-fluxonium systems Moreno, Valeria Díaz Dimitrov, Nikola D. Manucharyan, Vladimir E. Vavilov, Maxim G. Quantum Physics High-fidelity two-qubit gates have been demonstrated in systems of two fluxonium qubits; however, the realization of scalable quantum processors requires maintaining low error rates in substantially larger architectures. In this work, we analyze a system of four inductively coupled fluxonium qubits to determine the impact of spectator qubits on the performance of a \textsc{cnot} gate. Our results show that spectator-induced errors are strongly suppressed when the transition frequencies of the spectator qubits are sufficiently detuned from those of the active qubits. We identify favorable frequency configurations for the four-qubit chain that yield \textsc{cnot} gate errors below $10^{-4}$ for gate times shorter than 100 ns. Leveraging the locality of the nearest-neighbor coupling, we extrapolate our findings to longer fluxonium chains, suggesting a viable path toward scalable, low-error quantum information processing. |
| title | CNOT gates in inductively coupled multi-fluxonium systems |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2512.11756 |