文章基本信息

标题：One-qubit purity in terms of the discrete Wigner transform
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作者：Manuel Ávila Aoki
期刊名称：Ciencia Ergo Sum
印刷版ISSN：1405-0269
出版年度：2020
卷号：27
期号：1
页码：1-7
DOI：10.30878/ces.v27n1a9
出版社：Universidad Autónoma del Estado de México
摘要：An explanation and an illustration of the meaning of a discrete phase-space is given. The class of a discrete Wigner transform (DWT) for the specific case of a one-qubit state is introduced. We derive the one-qubit state formalism around its formulation in terms of the DWT in detail. A novel structure of a one-qubit purity in terms of the DWT is introduced. We find a criterion for stating when a one-qubit state is either mixed or pure..
关键词：Discrete phase space; Hilbert space; unbiased bases; discrete Wigner transform; purity.
其他关键词：Espacio fase discreto; espacio de Hilbert; bases imparciales; transformada discreta de Wigner; pureza.