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arXiv 1007.0756hep-th
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二维共形场论中态简并的界

Bounds for State Degeneracies in 2D Conformal Field Theory

Simeon Hellerman, Cornelius Schmidt-Colinet

摘要:

在这篇文章中,我们探讨了在2维CFT中模不变性的应用,以推导出描述某些状态退化的量的通用界限,例如热力学熵或边际算子的数量。我们表明,熵在逆温度2 π满足一个普遍的下限,我们列举的主要障碍,推导上界熵或量子力学退化完全一般的CFTs。然后,我们限制我们的注意力,红外稳定的CFT适度低中心荷,除了通常的假设,模不变性,酉性和离散算子谱。对于在c_left + c_right < 48的范围内的CFT,没有相关的算子,我们能够证明在逆温度2 π处的热力学熵的上界。在同样的条件下,我们还证明了CFT可以有不大于((c_left + c_right)/(48 - c_left - c_right))e^(4 Pi)- 2的边缘变形数。

英文摘要:

In this note we explore the application of modular invariance in 2-dimensional CFT to derive universal bounds for quantities describing certain state degeneracies, such as the thermodynamic entropy, or the number of marginal operators. We show that the entropy at inverse temperature 2 pi satisfies a universal lower bound, and we enumerate the principal obstacles to deriving upper bounds on entropies or quantum mechanical degeneracies for fully general CFTs. We then restrict our attention to infrared stable CFT with moderately low central charge, in addition to the usual assumptions of modular invariance, unitarity and discrete operator spectrum. For CFT in the range c_left + c_right < 48 with no relevant operators, we are able to prove an upper bound on the thermodynamic entropy at inverse temperature 2 pi. Under the same conditions we also prove that a CFT can have a number of marginal deformations no greater than ((c_left + c_right) / (48 - c_left - c_right)) e^(4 Pi) - 2.

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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