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arXiv 2209.07918quant-phcond-mat.mes-hall
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晶格自旋系统数字量子模拟的配方

Recipes for the Digital Quantum Simulation of Lattice Spin Systems

Guido Burkard

AI总结:

本文提出用Trotter-Suzuki展开、图着色和并行对易项执行构建晶格自旋系统数字量子模拟算法,并给出关键资源估计与电路构造。

摘要:

我们描述了为具有局域相互作用的规则晶格上的量子自旋系统构建数字量子模拟算法的方法。除了Trotter-Suzuki展开和图着色等工具外,我们还讨论了通过并行执行大量对易项所获得的效率提升。我们为最重要的情况和自旋系统类别提供了资源估计和量子电路元件。作为资源估计,我们给出了总门数$N$和模拟时间$T$,它们用自旋1/2晶格位点(量子比特)数$n$、目标精度$ε$和模拟时间$t$来表示。我们提供了实现一阶和高阶Trotter展开的电路构造,其模拟时间分别为$T^{(1)}\propto nt^2/ε$和$T^{(2q)}\propto t^{1+η}n^η/ε^η$,其中$η=1/2q$可任意小。我们还讨论了尚未被充分探索的缩放门的潜在影响。

英文摘要:

We describe methods to construct digital quantum simulation algorithms for quantum spin systems on a regular lattice with local interactions. In addition to tools such as the Trotter-Suzuki expansion and graph coloring, we also discuss the efficiency gained by parallel execution of an extensive number of commuting terms. We provide resource estimates and quantum circuit elements for the most important cases and classes of spin systems. As resource estimates we indicate the total number of gates $N$ and simulation time $T$, expressed in terms of the number $n$ of spin 1/2 lattice sites (qubits), target accuracy $ε$, and simulated time $t$. We provide circuit constructions that realize the simulation time $T^{(1)}\propto nt^2/ε$ and $T^{(2q)}\propto t^{1+η}n^η/ε^η$ for arbitrarily small $η=1/2q$ for the first-order and higher-order Trotter expansions. We also discuss the potential impact of scaled gates, which have not yet been fully explored.

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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