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arXiv 0904.4677hep-th
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N=6超共形Chern-Simons理论中的广义动力学自旋链和4-圈可积性

Generalized Dynamical Spin Chain and 4-Loop Integrability in N=6 Superconformal Chern-Simons Theory

Dongsu Bak, Hyunsoo Min, Soo-Jong Rey

摘要:

我们重新审视中心扩展的酉表示(2| 2)激发超代数。我们发现,最一般的“伪动量”,而不是晶格动量,对角化自旋链哈密顿量,并导致广义动态自旋链。所有已知的结果都指向N=4的超Yang-Mills理论的格点动量对角化。在不同的相互作用结构下,我们问N=6超共形Chern-Simons理论是否提供了一个赝动量对角化的例子。对于SO(6)扇区,我们研究了伸缩算子中的最大洗牌项和次最大洗牌项,并与psu(2)的结果进行了比较|2)超代数与可积性。在两个循环,我们重新推导最大洗牌项(3-网站),并找到完美的协议与已知的结果。在四个循环中,我们首先发现不存在下一个最大的洗牌项(4-站点),与基于可积性的预测一致。接下来,我们提取最大洗牌项(5-站点),用于检查伪动量对角化的可能性的最相关项。奇怪的是,我们发现这个结果与基于格点动量的可积性预言一致,如N=4的超杨-米尔斯理论。我们的结果的一致性是完全确保了可重正化检查多达六个循环。

英文摘要:

We revisit unitary representation of centrally extended (2 | 2) excitation superalgebra. We find most generally that `pseudo-momentum', not lattice momentum, diagonalizes spin chain Hamiltonian and leads to generalized dynamic spin chain. All known results point to lattice momentum diagonalization for N=4 super Yang-Mills theory. Having different interacting structure, we ask if N=6 superconformal Chern-Simons theory provides an example of pseudo-momentum diagonalization. For SO(6) sector, we study maximal shuffling and next-to-maximal shuffling terms in the dilatation operator and compare them with results expected from psu(2|2) superalgebbra and integrability. At two loops, we rederive maximal shuffling term (3-site) and find perfect agreement with known results. At four loops, we first find absence of next-to-maximal shuffling term (4-site), in agreement with prediction based on integrability. We next extract maximal shuffling term (5-site), the most relevant term for checking the possibility of pseudo-momentum diagonalization. Curiously, we find that result agrees with integraility prediction based on lattice momentum, as in N=4 super Yang-Mills theory. Consistency of our results is fully ensured by checks of renormalizability up to six loops.

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