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arXiv 1709.06346quant-ph
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量子力学中部分追踪操作的集合论方法

A set theoretical approach for the partial tracing operation in quantum mechanics

Pranay Barkataki, M. S. Ramkarthik

摘要:

部分迹是量子力学中非常重要的数学运算。它不仅有助于研究复合量子系统中的子系统,而且可以用于计算绝大多数量子纠缠度量。随着希尔伯特空间维度呈指数级增加,计算部分迹随着量子比特数量的增加而变得计算非常密集。本文讨论了一种新的基于集合论的部分跟踪方法,它比传统的部分跟踪方法更有效。所提出的方法的部分跟踪克服了所有的限制,其他众所周知的方法,如计算密集,并限于低维希尔伯特空间。我们给出了详细的理论描述,我们的方法,并提供了一个明确的计算例子。讨论了新方法的优点和其他关键思想。

英文摘要:

Partial trace is a very important mathematical operation in quantum mechanics. It is not only helpful in studying the subsystems of a composite quantum system but also used in computing a vast majority of quantum entanglement measures. Calculating partial trace becomes computationally very intensive with increasing number of qubits as the Hilbert space dimension increases exponentially. In this paper we discuss about our new method of partial tracing which is based on set theory and it is more efficient. The proposed method of partial tracing overcomes all the limitations of the other well known methods such as being computationally intensive and being limited to low dimensional Hilbert spaces. We give a detailed theoretical description of our method and also provide an explicit example of the computation. The merits of the new method and other key ideas are discussed.

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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