Change in bit-flip times of Kerr parametric oscillators caused by their interactions
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arXiv
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| Autores principales: | , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2026
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| _version_ | 1866908924408496128 |
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| author | Kano, Yuya Kawakami, Yohei Masuda, Shumpei Yamaji, Tomohiro Yamaguchi, Aiko Satoh, Tetsuro Morioka, Ayuka Endo, Kiyotaka Igarashi, Yuichi Shirane, Masayuki Yamamoto, Tsuyoshi |
| author_facet | Kano, Yuya Kawakami, Yohei Masuda, Shumpei Yamaji, Tomohiro Yamaguchi, Aiko Satoh, Tetsuro Morioka, Ayuka Endo, Kiyotaka Igarashi, Yuichi Shirane, Masayuki Yamamoto, Tsuyoshi |
| contents | We experimentally investigate how interactions between Kerr parametric oscillators (KPOs) degrade their bit-flip times, where a bit flip is defined as a transition between the two degenerate ground states of a KPO. Interactions between KPOs cause quantum states of KPOs to leak outside the computational subspace, leading to bit flips. Bit flips degrade fidelity and pose a significant problem for KPO-based quantum information processing. We performed an experiment in which a weak microwave signal is injected into one KPO to emulate photon injection from another KPO, and find that the bit-flip time decreases by an order of magnitude due to induced excitations, depending on the frequency and power of the injected signal. Methods to mitigate the decrease in bit-flip times caused by interactions between KPOs are discussed, including adjusting the pump frequencies, coherent-state amplitudes, and couplings between KPOs. These findings provide valuable insights for scaling up KPO-based quantum computers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_29308 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Change in bit-flip times of Kerr parametric oscillators caused by their interactions Kano, Yuya Kawakami, Yohei Masuda, Shumpei Yamaji, Tomohiro Yamaguchi, Aiko Satoh, Tetsuro Morioka, Ayuka Endo, Kiyotaka Igarashi, Yuichi Shirane, Masayuki Yamamoto, Tsuyoshi Quantum Physics We experimentally investigate how interactions between Kerr parametric oscillators (KPOs) degrade their bit-flip times, where a bit flip is defined as a transition between the two degenerate ground states of a KPO. Interactions between KPOs cause quantum states of KPOs to leak outside the computational subspace, leading to bit flips. Bit flips degrade fidelity and pose a significant problem for KPO-based quantum information processing. We performed an experiment in which a weak microwave signal is injected into one KPO to emulate photon injection from another KPO, and find that the bit-flip time decreases by an order of magnitude due to induced excitations, depending on the frequency and power of the injected signal. Methods to mitigate the decrease in bit-flip times caused by interactions between KPOs are discussed, including adjusting the pump frequencies, coherent-state amplitudes, and couplings between KPOs. These findings provide valuable insights for scaling up KPO-based quantum computers. |
| title | Change in bit-flip times of Kerr parametric oscillators caused by their interactions |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2603.29308 |