AI 中文总结
该研究针对自旋 - 超导混合量子系统，利用基于最优不变量的捷径理论抑制换能器泄漏误差，通过介导虚拟光子交换能量，设计优化脉冲控制，实现高保真量子操作，抵抗控制误差影响，为精确操纵量子态提供可行路径。
AI 中文摘要
我们提出一种利用基于最优不变量的捷径理论来抑制自旋 - 超导混合量子系统中换能器泄漏误差的方法。通过介导虚拟光子作为换能器在自旋量子比特和传输子量子比特之间交换能量，在泄漏误差影响下，最终态布居保真度在99%以上的宽范围内。可将从计算子空间到非计算子空间的泄漏概率有效抑制到最低值0.01。基于不变量逆工程设计的优化脉冲控制，实现了计算子空间内的高保真量子iSWAP门操作和纠缠态制备。与传统π脉冲、绝热门去导数、反绝热捷径方案以及有限内存布罗伊登 - 弗莱彻 - 戈德法布 - 沙诺梯度上升脉冲工程相比，优化的捷径方案在存在退相干和控制误差时仍能达到99%的高保真度。考虑到实际情况中泄漏误差的可能性，我们的解决方案仍能很大程度抵抗控制误差的影响。结果为精确操纵混合量子系统的量子态提供了一条可行路径。
英文摘要
We present a method for suppressing transducer leakage errors in spin-superconducting hybrid quantum systems with the theory of optimal invariant-based shortcut. By mediated virtual photons as a transducer to exchange the energy between the spin qubit and a transmon qubit, the fidelity of the population of the final state features a broad range above 99\% under the influence of leakage error. The leakage probability from computational subspace to non-computational subspace can be effectively suppressed at a lowest value with $0.01$. Based on the optimized pulse control designed by the invariant-based inverse engineering, the high-fidelity quantum iSWAP gate operations and entanglement state preparation within the computational subspace are achieved. {Compared to the traditional $π$ pulse, derivative removal by adiabatic gate, counter-diabatic shortcut schemes, and limited-memory Broyden-Fletcher-Goldfarb-Shanno gradient ascent pulse engineering, the optimized shortcut scheme can still achieve a high fidelity with 99\% in the presence of decoherence and control error.} When taking into account the possibility of leakage errors in actual situations, our solution can still largely resist the influence of control errors. The results provides a feasible path for precisely manipulating the quantum state of hybrid quantum systems.
Comments2026 New J. Phys. 28 074515
Journal ref2026 New J. Phys. 28 074515
