A general framework for recursive decompositions of unitary quantum evolutions

A general framework for recursive decompositions of unitary quantum evolutions
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酉量子演化递归分解的通用框架

DOI:
10.1088/1751-8113/41/15/155302
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发表时间:
2007
期刊:
Journal of Physics A: Mathematical and Theoretical
影响因子:
--
通讯作者:
Jonathan D. H. Smith
Jonathan D. H. Smith
中科院分区:
--
文献类型:
--
作者:
M. Daǧlı;D. D’Alessandro;Jonathan D. H. Smith

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酉群U(n)的分解是量子信息理论中的有用工具,因为它们允许将酉演化分解为局部演化和引起纠缠的演化。在文献中已经提出了几种递归分解来表示酉算子为简单算子与纠缠动力学相关性质的乘积。在本文中,使用的概念,分次的李代数,我们铸造这些分解在一个统一的计划,并显示如何新的递归分解可以得到。特别地,我们提出了一种新的N量子比特上的幺正算子的递归分解,并给出了一个数值例子。
Decompositions of the unitary group U(n) are useful tools in quantum information theory as they allow one to decompose unitary evolutions into local evolutions and evolutions causing entanglement. Several recursive decompositions have been proposed in the literature to express unitary operators as products of simple operators with properties relevant in entanglement dynamics. In this paper, using the concept of grading of a Lie algebra, we cast these decompositions in a unifying scheme and show how new recursive decompositions can be obtained. In particular, we propose a new recursive decomposition of the unitary operator on N qubits, and give a numerical example.
DOI: --
发表时间: 2007
期刊:
影响因子: --
作者:
H. Ohno;et. al.;H. Ohno;H. Ohno;H. Ohno;H. Ohno;大野 博道;大野 博道
通讯作者: 大野 博道