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arXiv 2004.10199quant-ph
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超导电路最优控制的非绝热几何量子计算

Nonadiabatic geometric quantum computation with optimal control on superconducting circuits

Jing Xu, Sai Li, Tao Chen, Zheng-Yuan Xue

摘要:

量子门是量子计算机的基本组成部分,但它非常脆弱。因此,实现高保真度的鲁棒量子门是量子操纵的最终目标。在这里,我们提出了一个非绝热几何量子计算方案的超导电路工程任意量子门,它既共享几何相位的鲁棒性优点,并结合最优控制技术,以进一步提高门的鲁棒性的能力。具体地说,在我们的建议中,任意几何单量子比特门可以在transmon量子比特上实现,通过谐振微波场驱动,驱动的幅度和相位都是时间相关的。同时,非平凡的两量子比特几何门可以由两个电容耦合的transmon量子比特实现,其中一个transmon量子比特的频率被调制以获得它们之间的有效谐振耦合。因此,我们的计划提供了一个有前途的一步容错固态量子计算。

英文摘要:

Quantum gates, which are the essential building blocks of quantum computers, are very fragile. Thus, to realize robust quantum gates with high fidelity is the ultimate goal of quantum manipulation. Here, we propose a nonadiabatic geometric quantum computation scheme on superconducting circuits to engineer arbitrary quantum gates, which share both the robust merit of geometric phases and the capacity to combine with optimal control technique to further enhance the gate robustness. Specifically, in our proposal, arbitrary geometric single-qubit gates can be realized on a transmon qubit, by a resonant microwave field driving, with both the amplitude and phase of the driving being time-dependent. Meanwhile, nontrivial two-qubit geometric gates can be implemented by two capacitively coupled transmon qubits, with one of the transmon qubits' frequency being modulated to obtain effective resonant coupling between them. Therefore, our scheme provides a promising step towards fault-tolerant solid-state quantum computation.

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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