Integrable 2d sigma models: Quantum corrections to geometry from RG flow
Integrable 2d sigma models: Quantum corrections to geometry from RG flow
复制标题
可积分 2d sigma 模型:RG 流对几何形状的量子校正
DOI:
10.1016/j.nuclphysb.2019.114798
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发表时间:
2019
影响因子:
2.8
通讯作者:
Hoare B
中科院分区:
文献类型:
--
作者:
Hoare B
Classically integrable σ-models are known to be solutions of the 1-loop RG equations, or “Ricci flow”, with only a few couplings running. In some of the simplest examples of integrable deformations we find that in order to preserve this property at 2 (and higher) loops the classical σ-model should be corrected by quantum counterterms. The pattern is similar to that of effective σ-models associated to gauged WZW theories. We consider in detail the examples of the η-deformation of S 2 (“sausage model”) and H 2, as well as the closely related λ-deformation of the S O (1, 2)/S O (2) coset. We also point out that similar counterterms are required in order for non-abelian duality to commute with RG flow beyond the 1-loop order.
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Nuclear Physics
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