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arXiv 1709.01533hep-th
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Flaint二维CFT配分函数的约束条件

Constraints on Flavored 2d CFT Partition Functions

Ethan Dyer, A. Liam Fitzpatrick, Yuan Xin

摘要:

我们研究了模块化不变性的影响,2D CFT配分函数与阿贝尔或非阿贝尔电流时的化学势的电荷被打开,即当配分函数“调味”。我们首先对这种配分函数的模变换的变换律作了新的证明。然后,我们继续应用模块引导技术来限制理论中的带电态谱。我们改进了以前的上界的状态与最大的“质荷”比在这样的理论,以及上界的重量最轻的带电状态和电荷的最弱的带电状态的理论。我们应用极值泛函方法的理论,饱和这样的界限,并在几种情况下,我们发现由此产生的预测的占领数是精确的整数。因为这样的理论有时不饱和的状态的整个空间上的边界,但饱和的状态的中性扇区的边界,我们发现,添加风味允许极值函数的方法来解决一些配分函数,否则将无法访问。

英文摘要:

We study the implications of modular invariance on 2d CFT partition functions with abelian or non-abelian currents when chemical potentials for the charges are turned on, i.e. when the partition functions are "flavored". We begin with a new proof of the transformation law for the modular transformation of such partition functions. Then we proceed to apply modular bootstrap techniques to constrain the spectrum of charged states in the theory. We improve previous upper bounds on the state with the greatest "mass-to-charge" ratio in such theories, as well as upper bounds on the weight of the lightest charged state and the charge of the weakest charged state in the theory. We apply the extremal functional method to theories that saturate such bounds, and in several cases we find the resulting prediction for the occupation numbers are precisely integers. Because such theories sometimes do not saturate a bound on the full space of states but do saturate a bound in the neutral sector of states, we find that adding flavor allows the extremal functional method to solve for some partition functions that would not be accessible to it otherwise.

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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