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arXiv 0812.0562math-phmath.MPquant-ph
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有序算子指数的高阶分解

Higher Order Decompositions of Ordered Operator Exponentials

Nathan Wiebe, Dominic W. Berry, Peter Hoyer, Barry C. Sanders

摘要:

我们提出了一种基于Lie-Trotter-Suzuki乘积公式的分解方案,将有序算子指数表示为普通算子指数的乘积。我们提供了一个严格的证明,不使用时间位移超算子,并可以适用于非解析函数。我们的证明提供了明确的界限上的错误,并包括情况下,功能不是无限可微的。我们表明,李-特罗特-铃木产品公式仍然可以用于功能,不是无限可微的,但任意顺序缩放可能无法实现。

英文摘要:

We present a decomposition scheme based on Lie-Trotter-Suzuki product formulae to represent an ordered operator exponential as a product of ordinary operator exponentials. We provide a rigorous proof that does not use a time-displacement superoperator, and can be applied to non-analytic functions. Our proof provides explicit bounds on the error and includes cases where the functions are not infinitely differentiable. We show that Lie-Trotter-Suzuki product formulae can still be used for functions that are not infinitely differentiable, but that arbitrary order scaling may not be achieved.

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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