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arXiv 1906.01909hep-thcond-mat.stat-mech
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可积扰动$SU(2)_k$ WZNW的边界熵

Boundary entropy of integrable perturbed $SU(2)_k$ WZNW

Ivan Kostov, Didina Serban, Dinh-Long Vu

摘要:

我们应用最近发展的分析方法计算边界熵,或g函数,在可积理论与非对角散射。我们考虑了电流扰动的$SU(2)_k$ WZNW模型的特殊情况,并计算了特定边界条件下的边界熵。我们遇到的主要问题是,在非对角散射的情况下,边界熵是无穷大的。我们表明,这个无穷大可以治愈的减法。在紫外线和红外限制的边界熵的差异是有限的,并匹配已知的g-函数的未扰动的$SU(2)_k$ WZNW模型的水平的偶数值。

英文摘要:

We apply the recently developped analytical methods for computing the boundary entropy, or the g-function, in integrable theories with non-diagonal scattering. We consider the particular case of the current-perturbed $SU(2)_k$ WZNW model with boundary and compute the boundary entropy for a specific boundary condition. The main problem we encounter is that in case of non-diagonal scattering the boundary entropy is infinite. We show that this infinity can be cured by a subtraction. The difference of the boundary entropies in the UV and in the IR limits is finite, and matches the known g-functions for the unperturbed $SU(2)_k$ WZNW model for even values of the level.

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。

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