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arXiv 2201.06380quant-phcs.ET
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减小线性可逆量子线路的深度

Reducing the Depth of Linear Reversible Quantum Circuits

Timothée Goubault de Brugière, Marc Baboulin, Benoît Valiron, Simon Martiel, Cyril Allouche

摘要:

在量子计算中,量子比特的退相干时间决定了可用的计算时间,并且当使用当前硬件时,该时间非常有限。在本文中,我们最小化一类电路的执行时间(深度),称为线性可逆电路,它在量子计算中有许多应用(例如,稳定器电路、CNOT+T电路等)。我们提出了一个实用的制定一个分而治之的算法,产生量子线路是现有算法产生的两倍浅。我们提高了理论上的上限的深度在最坏的情况下,为一定范围的量子比特。我们还提出了基于成本最小化的贪婪算法,以找到更小或简单的运营商的最佳电路。总的来说,我们设法持续减少一类可逆函数的总深度,在无辅助的情况下节省高达92%,在辅助量子位可用时节省高达99%。

英文摘要:

In quantum computing the decoherence time of the qubits determines the computation time available and this time is very limited when using current hardware. In this paper we minimize the execution time (the depth) for a class of circuits referred to as linear reversible circuits, which has many applications in quantum computing (e.g., stabilizer circuits, CNOT+T circuits, etc.). We propose a practical formulation of a divide and conquer algorithm that produces quantum circuits that are twice as shallow as those produced by existing algorithms. We improve the theoretical upper bound of the depth in the worst case for some range of qubits. We also propose greedy algorithms based on cost minimization to find more optimal circuits for small or simple operators. Overall, we manage to consistently reduce the total depth of a class of reversible functions, with up to 92% savings in an ancilla-free case and up to 99% when ancillary qubits are available.

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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