arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1106.2483hep-th
收藏

非平面可积性:超越SU(2)扇区

Nonplanar Integrability: Beyond the SU(2) Sector

Robert de Mello Koch, Badr Awad Elseid Mohammed, Stephanie Smith

摘要:

计算了具有经典维数Δ \sim O(N)的限制Schur多项式的单圈反常维数.我们考虑的算子被标记为具有两个长列或两个长行的Young图。通过将问题转化为自旋链语言,得到了伸缩算子作用量的简单解析表达式,并构造了定义限制Schur多项式所需的投影算子,推广了理论SU(2)部分的早期结果.扩张算子的对角化归结为求解五项递归关系。该递推关系可以用对称克拉夫丘克多项式与哈恩多项式的乘积来精确求解。这证明了伸缩算子简化为一组解耦的谐振子,因此它是可积的,扩展了理论的SU(2)扇区得出的类似结论。

英文摘要:

We compute the one loop anomalous dimensions of restricted Schur polynomials with a classical dimension Δ\sim O(N). The operators that we consider are labeled by Young diagrams with two long columns or two long rows. Simple analytic expressions for the action of the dilatation operator are found. The projection operators needed to define the restricted Schur polynomials are constructed by translating the problem into a spin chain language, generalizing earlier results obtained in the SU(2) sector of the theory. The diagonalization of the dilatation operator reduces to solving five term recursion relations. The recursion relations can be solved exactly in terms of products of symmetric Kravchuk polynomials with Hahn polynomials. This proves that the dilatation operator reduces to a decoupled set of harmonic oscillators and therefore it is integrable, extending a similar conclusion reached for the SU(2) sector of the theory.

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。

↑