Dynamic compensation for pump-induced frequency shift in Kerr-cat qubit initialization
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arXiv
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| Format: | Preprint |
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2024
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| author | Xu, Yifang Hua, Ziyue Wang, Weiting Ma, Yuwei Li, Ming Chen, Jiajun Zhou, Jie Pan, Xiaoxuan Xiao, Lintao Huang, Hongwei Cai, Weizhou Ai, Hao Liu, Yu-xi Zou, Chang-Ling Sun, Luyan |
| author_facet | Xu, Yifang Hua, Ziyue Wang, Weiting Ma, Yuwei Li, Ming Chen, Jiajun Zhou, Jie Pan, Xiaoxuan Xiao, Lintao Huang, Hongwei Cai, Weizhou Ai, Hao Liu, Yu-xi Zou, Chang-Ling Sun, Luyan |
| contents | The noise-biased Kerr-cat qubit is an attractive candidate for fault-tolerant quantum computation; however, its initialization faces challenges due to the squeezing pump-induced frequency shift (PIFS). Here, we propose and demonstrate a dynamic compensation method to mitigate the effect of PIFS during the Kerr-cat qubit initialization. Utilizing a novel nonlinearity-engineered triple-loop SQUID device, we realize a stabilized Kerr-cat qubit and validate the advantages of the dynamic compensation method by improving the initialization fidelity from 57% to 78%, with a projected fidelity of 91% after excluding state preparation and measurement errors. Our results not only advance the practical implementation of Kerr-cat qubits, but also provide valuable insights into the fundamental adiabatic dynamics of these systems. This work paves the way for scalable quantum processors that leverage the bias-preserving properties of Kerr-cat qubits. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_14112 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Dynamic compensation for pump-induced frequency shift in Kerr-cat qubit initialization Xu, Yifang Hua, Ziyue Wang, Weiting Ma, Yuwei Li, Ming Chen, Jiajun Zhou, Jie Pan, Xiaoxuan Xiao, Lintao Huang, Hongwei Cai, Weizhou Ai, Hao Liu, Yu-xi Zou, Chang-Ling Sun, Luyan Quantum Physics The noise-biased Kerr-cat qubit is an attractive candidate for fault-tolerant quantum computation; however, its initialization faces challenges due to the squeezing pump-induced frequency shift (PIFS). Here, we propose and demonstrate a dynamic compensation method to mitigate the effect of PIFS during the Kerr-cat qubit initialization. Utilizing a novel nonlinearity-engineered triple-loop SQUID device, we realize a stabilized Kerr-cat qubit and validate the advantages of the dynamic compensation method by improving the initialization fidelity from 57% to 78%, with a projected fidelity of 91% after excluding state preparation and measurement errors. Our results not only advance the practical implementation of Kerr-cat qubits, but also provide valuable insights into the fundamental adiabatic dynamics of these systems. This work paves the way for scalable quantum processors that leverage the bias-preserving properties of Kerr-cat qubits. |
| title | Dynamic compensation for pump-induced frequency shift in Kerr-cat qubit initialization |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2408.14112 |