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arXiv 1608.02618quant-phmath-phmath.MP
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琼斯指数、秘密共享与量子全维数

Jones index, secret sharing and total quantum dimension

Leander Fiedler, Pieter Naaijkens, Tobias J. Osborne

摘要:

本文研究了拓扑有序系统在热力学极限下的全量子维数。特别是,使用这样的模型的任意子(或超选择部门),我们定义了一个秘密共享方案,存储信息不可见的恶意方,并认为,总的量子维度量化我们可以执行这项任务。然后,我们认为,这可以在数学上严格使用子因子的指数理论,最初是由于琼斯,后来由Kosaki和Longo扩展。这个理论为我们提供了一个“相对熵“的两个冯诺依曼代数和一个量子信道,我们认为这些可以被用来量化多少经典信息两方可以隐藏的对手。我们还回顾了有限系统中的总量子维数,特别是它与拓扑纠缠熵的关系。众所周知,后者也有一个解释的秘密共享计划,虽然这是由完全不同的方法从我们的。我们的工作提供了一个不同的和独立的采取这一点,这在同一时间是完全严格的数学。这种互补的观点可能是有益的,例如,当研究系统被扰动时总量子维度的稳定性时。

英文摘要:

We study the total quantum dimension in the thermodynamic limit of topologically ordered systems. In particular, using the anyons (or superselection sectors) of such models, we define a secret sharing scheme, storing information invisible to a malicious party, and argue that the total quantum dimension quantifies how well we can perform this task. We then argue that this can be made mathematically rigorous using the index theory of subfactors, originally due to Jones and later extended by Kosaki and Longo. This theory provides us with a "relative entropy" of two von Neumann algebras and a quantum channel, and we argue how these can be used to quantify how much classical information two parties can hide form an adversary. We also review the total quantum dimension in finite systems, in particular how it relates to topological entanglement entropy. It is known that the latter also has an interpretation in terms of secret sharing schemes, although this is shown by completely different methods from ours. Our work provides a different and independent take on this, which at the same time is completely mathematically rigorous. This complementary point of view might be beneficial, for example, when studying the stability of the total quantum dimension when the system is perturbed.

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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