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arXiv 1105.4598hep-thcond-mat.stat-mechhep-ph
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无超对称的F-定理

F-Theorem without Supersymmetry

Igor R. Klebanov, Silviu S. Pufu, Benjamin R. Safdi

摘要:

三维场论的修正F定理指出,S^3上自由能的有限部分沿着RG轨迹递减,并且在不动点处是静止的。在以前的工作中,对{ \cal N}=2的超对称理论进行了各种成功的测试。在本文中,我们进行更一般的测试,不依赖于超对称性。我们微扰地研究了弱相关算子产生的RG流,并证明了自由能单调减小。我们还考虑了大N场论受相关的双迹算子扰动,自由大质量场论,和一些陈-西蒙斯规范理论。在所有情况下,红外线中的自由能都小于紫外线中的自由能,这与F定理一致。我们讨论了S^d上的其他奇维欧氏理论,并证明了(-1)^{(d-1)/2} \log |Z|沿RG流递减;在d=1的特殊情况下,这是众所周知的g-定理。

英文摘要:

The conjectured F-theorem for three-dimensional field theories states that the finite part of the free energy on S^3 decreases along RG trajectories and is stationary at the fixed points. In previous work various successful tests of this proposal were carried out for theories with {\cal N}=2 supersymmetry. In this paper we perform more general tests that do not rely on supersymmetry. We study perturbatively the RG flows produced by weakly relevant operators and show that the free energy decreases monotonically. We also consider large N field theories perturbed by relevant double trace operators, free massive field theories, and some Chern-Simons gauge theories. In all cases the free energy in the IR is smaller than in the UV, consistent with the F-theorem. We discuss other odd-dimensional Euclidean theories on S^d and provide evidence that (-1)^{(d-1)/2} \log |Z| decreases along RG flow; in the particular case d=1 this is the well-known g-theorem.

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