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arXiv 1004.5586cond-mat.str-elhep-th
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拓扑相的时空几何

Space-Time Geometry of Topological phases

F. J. Burnell, Steven H. Simon

摘要:

Levin和Wen [PRB 71,045110(2005)]的2+1维晶格模型提供了物质的拓扑相的最普遍的已知微观构造。这些模型在很大程度上基于范畴论的数学结构,因此许多特殊性质并不明显。在本文中,我们提出了一个几何时空图片的配分函数的莱文-温模型,可以描述为双打(两个副本相反的手征)的基本Anyon理论。我们的时空图将配分函数描述为一个复杂链接的结不变量,其中微观莱文-温模型的晶格变量和哈密顿量的项都表示为这个链接的标记字符串。这个复杂的链接,以前在数学文献中研究过,被称为Chain-Mail,可以直接与三维流形的已知拓扑不变量有关,例如所谓的Turaev-Viro不变量和Witten-Reshitikhin-Turaev不变量。我们进一步考虑准粒子激发的莱文-温模型,我们看到他们如何可以通过添加额外的字符串链邮件链接代表准粒子世界线的理解。我们的建设提供了特别重要的新的见解,如何从这些微观模型产生的双重理论。

英文摘要:

The 2+1 dimensional lattice models of Levin and Wen [PRB 71, 045110 (2005)] provide the most general known microscopic construction of topological phases of matter. Based heavily on the mathematical structure of category theory, many of the special properties of these models are not obvious. In the current paper, we present a geometrical space-time picture of the partition function of the Levin-Wen models which can be described as doubles (two copies with opposite chiralities) of underlying Anyon theories. Our space-time picture describes the partition function as a knot invariant of a complicated link, where both the lattice variables of the microscopic Levin-Wen model and the terms of the hamiltonian are represented as labeled strings of this link. This complicated link, previously studied in the mathematical literature, and known as Chain-Mail, can be related directly to known topological invariants of 3-manifolds such as the so called Turaev-Viro invariant and the Witten-Reshitikhin-Turaev invariant. We further consider quasi-particle excitations of the Levin-Wen models and we see how they can be understood by adding additional strings to the Chain-Mail link representing quasi-particle world-lines. Our construction gives particularly important new insight into how a doubled theory arises from these microscopic models.

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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