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arXiv 2103.08169quant-phcond-mat.supr-con
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平滑脉冲控制校正多量子比特系统中量子门的相关误差

Correcting correlated errors for quantum gates in multi-qubit systems using smooth pulse control

Xiu-Hao Deng, Yong-Ju Hai, Jun-Ning Li, Yao Song

摘要:

在多量子比特系统中,关联误差与其他量子比特之间的相互作用是量子计算机规模化应用的主要障碍之一。我们提出了两种方法来纠正这种噪声,并证明具有高保真度和鲁棒性。我们使用旁观者和入侵者来区分不同参数范围内与目标量子位相互作用的环境。我们所提出的方法结合了解析理论和数值优化,并且对于各种量子比特系统获得平滑的控制脉冲是通用的。理论和数值模拟都证明了该方法的有效性.对于一组单量子位门和两量子位纠缠门,门的量子数在大范围的参数变化上通常高于$0.9999$。与已知的控制波形的比较证明了我们的解决方案的巨大优势。

英文摘要:

In multi-qubit system, correlated errors subject to unwanted interactions with other qubits is one of the major obstacles for scaling up quantum computers to be applicable. We present two approaches to correct such noise and demonstrate with high fidelity and robustness. We use spectator and intruder to discriminate the environment interacting with target qubit in different parameter regime. Our proposed approaches combines analytical theory and numerical optimization, and are general to obtain smooth control pulses for various qubit systems. Both theory and numerical simulations demonstrate to correct these errors efficiently. Gate fidelities are generally above $0.9999$ over a large range of parameter variation for a set of single-qubit gates and two-qubit entangling gates. Comparison with well-known control waveform demonstrates the great advantage of our solutions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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