arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2001.01726hep-ph
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部分子模型中密度矩阵的纠缠、部分测量集和对角性

Entanglement, partial set of measurements, and diagonality of the density matrix in the parton model

Haowu Duan, Candost Akkaya, Alex Kovner, Vladimir V. Skokov

摘要:

我们定义了“无知熵”,它量化了与仅对量子系统进行部分测量的能力相关的熵。对于部分子模型,无知熵等于经典部分子系统的玻尔兹曼熵。我们分析了一个在色玻璃凝聚方法中用于描述低x胶子的可计算模型,它与QCD的部分子模型有相似之处。在这个模型中,我们计算了粒子数基的无知熵以及可观测自由度的纠缠熵。我们发现,这两个是相似的,在高动量,但不同的一个因素,在低动量的顺序统一。这适用于Renyi熵和冯诺伊曼熵。我们的结论是,纠缠似乎并没有发挥重要的作用,在部分子模型的背景下。

英文摘要:

We define the "entropy of ignorance" which quantifies the entropy associated with ability to perform only a partial set of measurement on a quantum system. For a parton model the entropy of ignorance is equal to a Boltzmann entropy of a classical system of partons. We analyze a calculable model used for describing low x gluons in Color Glass Condensate approach, which has similarities with the parton model of QCD. In this model we calculate the entropy of ignorance in the particle number basis as well as the entanglement entropy of the observable degrees of freedom. We find that the two are similar at high momenta, but differ by a factor of order unity at low momenta. This holds for the Renyi as well as von Neumann entropies. We conclude that the entanglement does not seem to play an important role in the context of the parton model.

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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