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arXiv 1804.03399hep-th
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可积性、对偶性与西格玛模型

Integrability, Duality and Sigma Models

V. A. Fateev, A. V. Litvinov

摘要:

介绍并研究了与屏蔽荷对易的$W-$代数的共形场论。这些CFT的扰动定义可积QFT的。我们建立了这些QFT的有本地和非本地的运动积分,并承认在弱耦合区域的微扰理论。我们构造了与非局部运动积分和微扰理论一致的因式分解散射理论。在强耦合极限下,该QFT的$S-$矩阵趋于$O(N)$西格玛模型的散射矩阵.利用微扰理论、Bethe anzatz技巧、重整化群方法和共形场论的方法,证明了所构造的QFT与$O(N)$ σ模型的可积变形是对偶的.

英文摘要:

We introduce and study conformal field theories specified by $W-$algebras commuting with certain set of screening charges. These CFT's possess perturbations which define integrable QFT's. We establish that these QFT's have local and non-local Integrals of Motion and admit the perturbation theory in the weak coupling region. We construct factorized scattering theory which is consistent with non-local Integrals of Motion and perturbation theory. In the strong coupling limit the $S-$matrix of this QFT tends to the scattering matrix of the $O(N)$ sigma model. The perturbation theory, Bethe anzatz technique, renormalization group approach and methods of conformal field theory are applied to show, that the constructed QFT's are dual to integrable deformation of $O(N)$ sigma-models.

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