Change in bit-flip times of Kerr parametric oscillators caused by their interactions

Quantum Physics [Submitted on 31 Mar 2026] Change in bit-flip times of Kerr parametric oscillators caused by their interactions Yuya Kano, Yohei Kawakami, Shumpei Masuda, Tomohiro Yamaji, Aiko Yamaguchi, Tetsuro Satoh, Ayuka Morioka, Kiyotaka Endo, Yuichi Igarashi, Masayuki Shirane, Tsuyoshi Yamamoto 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. Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2603.29308 [quant-ph]   (or arXiv:2603.29308v1 [quant-ph] for this version)   https://doi.org/10.48550/arXiv.2603.29308 Focus to learn more Submission history From: Yuya Kano [view email] [v1] Tue, 31 Mar 2026 06:20:57 UTC (3,421 KB) Access Paper: HTML (experimental) view license Current browse context: quant-ph < prev   |   next > new | recent | 2026-03 References & Citations INSPIRE HEP NASA ADS Google Scholar Semantic Scholar Export BibTeX Citation Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer (What is the Explorer?) Connected Papers Toggle Connected Papers (What is Connected Papers?) Litmaps Toggle Litmaps (What is Litmaps?) scite.ai Toggle scite Smart Citations (What are Smart Citations?) Code, Data, Media Demos Related Papers About arXivLabs Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)