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arXiv quant-ph/0511019quant-ph
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多量子点混合d值量子逻辑电路的分解综合

Synthesis of multi-qudit Hybrid and d-valued Quantum Logic Circuits by Decomposition

Faisal Shah Khan, Marek Perkowski

摘要:

最近将量子计算从2值量子点推广到d值量子点的研究已经显示出量子计算机扩展的实际优势。进一步的推广导致具有混合量子点的量子计算,其中两个或更多个量子点具有不同的有限维度。Muthukrishnan和Stroud(Physical Review A,052309,2000)、Daboul等人(J.Phys.A:Math.Gen.36 2525-2536,2003)和Bartlett等人(Physical Review A,Vol.65,052316,2002)已经详细研究了混合和d值门(电路)的优点及其物理实现。在这两种情况下,量子计算都是在幺正演化算符作为量子逻辑门变换量子系统中量子比特的状态时进行的。酉算子可以用平方酉矩阵表示。如果系统由单个qudit组成,那么Tilma等人(J.Phys. A:Math.Gen.35(2002)10467-10501)已经表明酉演化矩阵(门)可以根据其欧拉角参数化来合成。然而,如果量子系统由多个量子比特组成,则可以通过矩阵分解技术(诸如QR分解和余弦-正弦分解(CSD))来合成门。本文提出了一种基于CSD的n量子混合量子门的综合方法,并由此导出了一种基于CSD的n量子门的综合方法,其中所有量子门都具有相同的维数。

英文摘要:

Recent research in generalizing quantum computation from 2-valued qudits to d-valued qudits has shown practical advantages for scaling up a quantum computer. A further generalization leads to quantum computing with hybrid qudits where two or more qudits have different finite dimensions. Advantages of hybrid and d-valued gates (circuits) and their physical realizations have been studied in detail by Muthukrishnan and Stroud (Physical Review A, 052309, 2000), Daboul et al. (J. Phys. A: Math. Gen. 36 2525-2536, 2003), and Bartlett et al (Physical Review A, Vol.65, 052316, 2002). In both cases, a quantum computation is performed when a unitary evolution operator, acting as a quantum logic gate, transforms the state of qudits in a quantum system. Unitary operators can be represented by square unitary matrices. If the system consists of a single qudit, then Tilma et al (J.Phys. A: Math. Gen. 35 (2002) 10467-10501) have shown that the unitary evolution matrix (gate) can be synthesized in terms of its Euler angle parameterization. However, if the quantum system consists of multiple qudits, then a gate may be synthesized by matrix decomposition techniques such as QR factorization and the Cosine-sine Decomposition (CSD). In this article, we present a CSD based synthesis method for n qudit hybrid quantum gates, and as a consequence, derive a CSD based synthesis method for n qudit gates where all the qudits have the same dimension.

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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