镜像TBA的提升渐近简并
Lifting asymptotic degeneracies with the Mirror TBA
摘要：
我们描述了AdS_5 × S^5弦谱的一个定性特征，它不能被渐近Bethe分析所捕获。这是反映了增强离散对称性的渐近极限，从而额外的能量简并进入频谱。我们讨论如何有限大小的修正应解除这种简并，通过两个微扰（Luscher）和非微扰方法（镜像TBA），并说明了这两个这样的渐近退化状态明确。
英文摘要：
We describe a qualitative feature of the AdS_5 x S^5 string spectrum which is not captured by the asymptotic Bethe ansatz. This is reflected by an enhanced discrete symmetry in the asymptotic limit, whereby extra energy degeneracy enters the spectrum. We discuss how finite size corrections should lift this degeneracy, through both perturbative (Luscher) and non-perturbative approaches (the Mirror TBA), and illustrate this explicitly on two such asymptotically degenerate states.
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