arXiv 2302.091452023-02-17quant-phphysics.atom-ph

囚禁离子链中正交模上的成对平行纠缠门

Pairwise-parallel entangling gates on orthogonal modes in a trapped-ion chain

Yingyue Zhu, Alaina M. Green, Nhung H. Nguyen, C. Huerta Alderete, Elijah Mossman, Norbert M. Linke

摘要：

并行操作对于近期的量子计算机和更大规模的容错机器都很重要，因为它们减少了执行时间和量子比特空闲。我们提出并实现了一种在离子阱量子计算机上的成对并行门方案。门被同时驱动的捕获离子链的正交运动模式的不同集合。我们证明了该方案的实用性，通过创建一个GHZ状态在一个步骤中使用一个重叠的量子比特的并行门。我们还显示了它的优势，电路通过实现一个相互作用的自旋系统，横向场伊辛模型的动力学的数字量子模拟。当不涉及重叠量子位时，这种方法有效地将可用栅极深度扩展高达两倍，除了额外的初始冷却之外没有开销。这是因为使用一组额外的模式作为额外的量子自由度几乎相当于将陷阱加热速率减半，将激光和量子比特相干时间加倍，并将控制器存储器深度扩展到两倍。该方案可以很容易地应用于不同的捕获离子量子比特和门方案，广泛地增强了捕获离子量子计算机的能力。

英文摘要：

Parallel operations are important for both near-term quantum computers and larger-scale fault-tolerant machines because they reduce execution time and qubit idling. We propose and implement a pairwise-parallel gate scheme on a trapped-ion quantum computer. The gates are driven simultaneously on different sets of orthogonal motional modes of a trapped-ion chain. We demonstrate the utility of this scheme by creating a GHZ state in one step using parallel gates with one overlapping qubit. We also show its advantage for circuits by implementing a digital quantum simulation of the dynamics of an interacting spin system, the transverse-field Ising model. This method effectively extends the available gate depth by up to two times with no overhead apart from additional initial cooling when no overlapping qubit is involved. This is because using a set of extra modes as additional quantum degrees of freedom is nearly equivalent to halving the trap heating rate, doubling the laser and qubit coherence time, and extending the controller memory depth by up to a factor of two. This scheme can be easily applied to different trapped-ion qubits and gate schemes, broadly enhancing the capabilities of trapped-ion quantum computers.

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。

摘要：

英文摘要：

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