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arXiv 0712.1377math.QAcond-mat.mes-hallmath.GT
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关于模张量范畴的分类

On classification of modular tensor categories

Eric Rowell, Richard Stong, Zhenghan Wang

摘要:

我们对秩为$\leq 4$的所有酉模张量范畴(UMMC)进行分类。总共有70个等级为$\leq 4$的UMTC(请注意,有些作者会将其计为35个MTC)。在我们的约定中,有两个平凡的酉MTC,由模块化$S$矩阵$S=(\pm1)$区分。每一个这样的UMTC可以从10个非平凡的素数UMTC直接积,并通过一些对称运算得到。UMTCs编码了任意子量子系统的拓扑性质,可以用来构建容错量子计算机。我们猜想,对于任意给定的秩,MTCs的等价类只有100多个,并且UMTCs对任意子量子计算是普适的当且仅当其整体量子维数$D^2$是整数\emph{not}.自然界中非阿贝尔任意子的发现将是凝聚态物理学的一个里程碑。在秩为$\leq 4$的UMTC中,非阿贝尔任意子是最简单的,因此也是最容易被发现的。摩尔和N.里德提出,非阿贝尔统计可以发生在分数量子霍尔(Fractional quantum Hall,缩写为HHH)液体中。Read-Rezayi猜想预测了在FHH液体中在$k=1,2,3$的填充分数$ν=2+\frac{k}{k+2}$处存在与$SU(2)_k$相关的任意子。对于$ν={5/2}$和$SU(2)_2$,给出了该猜想的数值证明和实验证据. Ising任意子可能存在于手征超导体(顺丁烯二酸锶)中.对使用约瑟夫森结阵列的复曲面码MTC、使用光学晶格的$Fib\times Fib$ MTC和使用冷阱玻色子原子的$SU(2)_k$进行了理论设计。

英文摘要:

We classify all unitary modular tensor categories (UMTCs) of rank $\leq 4$. There are a total of 70 UMTCs of rank $\leq 4$ (Note that some authors would have counted as 35 MTCs.) In our convention there are two trivial unitary MTCs distinguished by the modular $S$ matrix $S=(\pm1)$. Each such UMTC can be obtained from 10 non-trivial prime UMTCs by direct product, and some symmetry operations. UMTCs encode topological properties of anyonic quantum systems and can be used to build fault-tolerant quantum computers. We conjecture that there are only finitely many equivalence classes of MTCs for any given rank, and a UMTC is universal for anyonic quantum computation if and only if its global quantum dimension $D^2$ is \emph{not} an integer. Discovery of non-abelain anyons in Nature will be a landmark in condensed matter physics. The non-abelian anyons in UMTCs of rank $\leq 4$ are the simplest, and, therefore, are most likely to be found. G. Moore and N. Read proposed that non-abelian statistics could occur in fractional quantum Hall (FQH) liquids. The Read-Rezayi conjecture predicts the existence of anyons related to $SU(2)_k$ in FQH liquids at filling fractions $ν=2+\frac{k}{k+2}$ for $k=1,2,3$. For $ν={5/2}$ and $SU(2)_2$, there is a numerical proof and experimental evidence for this conjecture. The Ising anyons might exist in chiral superconductors (strontium ruthenate). There are theoretical designs for the toric code MTC using Josephson junction array, for the $Fib\times Fib$ MTC using optical lattice, and for the $SU(2)_k$ using cold trapped bosonic atoms.

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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