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arXiv quant-ph/0702173quant-ph
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经典和量子随机游动中的Krawtchouk矩阵

Krawtchouk matrices from classical and quantum random walks

Philip Feinsilver, Jerzy Kocik

摘要:

Krawtchouk多项式在经典上是关于二项分布的正交多项式。它们也可以用矩阵的形式表示,即多项式所取值的数组。这些矩阵的代数性质在概率论的方法中提供了一个非常有趣和容易理解的例子,称为量子概率。首先,它是注意到如何Krawtchouk矩阵连接到经典的对称伯努利随机游动。我们展示了如何通过初等阿达玛矩阵的张量幂导出量子概率背景下的Krawtchouk矩阵。然后,通过计算量子情形下的期望值,说明了与经典情形的联系。

英文摘要:

Krawtchouk's polynomials occur classically as orthogonal polynomials with respect to the binomial distribution. They may be also expressed in the form of matrices, that emerge as arrays of the values that the polynomials take. The algebraic properties of these matrices provide a very interesting and accessible example in the approach to probability theory known as quantum probability. First it is noted how the Krawtchouk matrices are connected to the classical symmetric Bernoulli random walk. And we show how to derive Krawtchouk matrices in the quantum probability context via tensor powers of the elementary Hadamard matrix. Then connections with the classical situation are shown by calculating expectation values in the quantum case.

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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