发表机构
Fujian Key Laboratory of Quantum Information and Quantum Optics, Fuzhou University; Department of Physics, Fuzhou University; Quantum Information Physics Theory Research Team, Center for Quantum Computing, RIKEN; Institute of Quantum Science and Technology, Yanbian University（福州大学; 福州大学; 理化学研究所; 延边大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文针对猫态量子比特提出基于双光子耗散稳定与逆向工程绝热捷径的鲁棒控制协议，实现快速高保真态转移并抑制泄漏，为可扩展容错量子计算提供新框架。
AI 中文摘要
猫态量子比特是一类重要的玻色子编码，为实现硬件高效的容错量子计算提供了有前景的途径。本文中，我们针对通过工程化双光子耗散来稳定的猫态量子比特，提出了一种最优鲁棒控制协议。通过在猫态子空间中推导有效的二能级描述，并利用逆向工程实现绝热捷径，我们设计了一种鲁棒协议，以实现猫态量子比特中快速且高保真的态转移。我们分析了系统控制误差的敏感性，并确定了一个最优鲁棒性条件，该条件能强烈抑制由驱动场缺陷引起的误差。此外，我们证明耗散约束能有效抑制由纯退相引起的猫态子空间泄漏，凸显了耗散猫态量子比特的内在优势。这项工作为高保真玻色子量子比特控制建立了一个鲁棒且抑制泄漏的框架，为可扩展的容错量子计算提供了有前景的途径。
英文摘要
Cat-state qubits, a prominent class of bosonic encodings, offer a promising pathway toward hardware-efficient fault-tolerant quantum computing. In this manuscript, we propose an optimally robust control protocol for the cat-state qubits which are stabilized by engineering two-photon dissipation. By deriving an effective two-level description in the cat-state subspace and applying shortcut-to-adiabaticity via inverse engineering, we design a robust protocol to achieve fast and high-fidelity state transfer in the cat-state qubit. We analyze the sensitivity to systematic control errors and identify an optimal robustness condition that strongly suppresses errors induced by imperfections in the driving fields. Furthermore, we show that dissipative confinement efficiently suppresses leakage out of the cat-state subspace caused by the pure dephasing, highlighting an intrinsic advantage of dissipative-cat qubits. This work establishes a robust and leakage-suppressing framework for high-fidelity bosonic qubit control, offering a promising route toward scalable fault-tolerant quantum computing.
Comments15 Pages, 7 figures
