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On Pure Quasi-Quantum Quadratic Operators of M_2(C) Ⅱ

机译:关于M_2(C)Ⅱ的纯拟量子二次算子

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摘要

In this paper we study quasi quantum quadratic operators (QQO) acting on the algebra of 2×2 matrices M_2 (C). We consider two kinds of quasi QQO the corresponding quadratic operator maps from the unit circle into the sphere and from the sphere into the unit circle, respectively. In our early paper we have defined a q-purity of quasi QQO. This notion is equivalent to the invariance of the unit sphere in R~3. But to check this condition, in general, is tricky. Therefore, it would be better to find weaker conditions to check the q-purity. One of the main results of this paper is to provide a criterion of q-purity of quasi QQO in terms of the unit circles. Moreover, we are able to classify all possible kinds of quadratic operators which can produce q-pure quasi QQO. We think that such result will allow one to check whether a given mapping is a pure channel or not. This finding suggests us to study such a class of nonpositive mappings. Correspondingly, the complement of this class will be of potential interest for physicist since this set contains all completely positive mappings.
机译:本文研究了作用于2×2矩阵M_2(C)的代数的准量子二次算子(QQO)。我们考虑两种准QQO,它们对应的二次算子分别从单位圆到球面以及从球面到单位圆映射。在我们的早期论文中,我们定义了准QQO的q纯度。这个概念等效于R〜3中单位球的不变性。但是,一般来说,检查这种情况很棘手。因此,最好找到较弱的条件来检查q纯度。本文的主要结果之一是提供以单位圆为单位的准QQO的q纯度判据。此外,我们能够对所有可能产生q-纯拟QQO的二次算子进行分类。我们认为,这种结果将使人们能够检查给定的映射是否为纯通道。这一发现建议我们研究这类非正映射。相应地,由于该集合包含所有完全正的映射,因此物理学家可能会对此类的补充感兴趣。

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  • 来源
    《Open Systems & Information Dynamics》 |2015年第4期|1550024.1-1550024.22|共22页
  • 作者

    Farrukh Mukhamedov;

  • 作者单位

    Department of Computational & Theoretical Sciences Faculty of Science, International Islamic University Malaysia P.O.Box, 141, 25710, Kuantan Pahang, Malaysia;

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  • 正文语种 eng
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