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arXiv 1106.0004hep-thcond-mat.mes-hallquant-ph
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非阿贝尔统计与Witten anomaly

Non-Abelian statistics versus the Witten anomaly

John McGreevy, Brian Swingle

摘要:

本文的动机是在3+1维的非阿贝尔统计的deconfined粒子状物体的前景,实现为孤子与本地化的马约拉纳零模。为此,我们研究了3+1维自发破缺SU(2)规范理论中磁单极子的费米子集体坐标。我们认为,一个单一的马约拉纳零模的Witten SU(2)异常的取消是不兼容的。我们还比较了这种方法与其他尝试实现deconfined非阿贝尔对象在3+1维。

英文摘要:

This paper is motivated by prospects for non-Abelian statistics of deconfined particle-like objects in 3+1 dimensions, realized as solitons with localized Majorana zeromodes. To this end, we study the fermionic collective coordinates of magnetic monopoles in 3+1 dimensional spontaneously-broken SU(2) gauge theories with various spectra of fermions. We argue that a single Majorana zeromode of the monopole is not compatible with cancellation of the Witten SU(2) anomaly. We also compare this approach with other attempts to realize deconfined non-Abelian objects in 3+1 dimensions.

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