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arXiv 1905.06355hep-thcond-mat.str-elnucl-th
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2+1维纯CFT热力学在大N下的强耦合普适性

Strong Coupling Universality at Large N for Pure CFT Thermodynamics in 2+1 dimensions

Oliver DeWolfe, Paul Romatschke

摘要:

纯CFTs在任何耦合值下都具有消失的$β$ -函数。纯CFT的一个例子是O(N)Wess-Zumino模型在2+1维中的大N极限。该模型可以在有限温度下对任意耦合值进行解析求解,并且我们发现在强耦合下它的熵密度正好等于非相互作用Stefan-Boltzmann结果的31/35。我们表明,一个大类的理论与相等数量的N-分量费米子和玻色子,超对称或不,为一个大类的相互作用,表现出相同的普适比。对于不等数目的费米子和玻色子,我们发现强弱热力学比有界于4/5和1之间。

英文摘要:

Pure CFTs have vanishing $β$-function at any value of the coupling. One example of a pure CFT is the O(N) Wess-Zumino model in 2+1 dimensions in the large N limit. This model can be analytically solved at finite temperature for any value of the coupling, and we find that its entropy density at strong coupling is exactly equal to 31/35 of the non-interacting Stefan-Boltzmann result. We show that a large class of theories with equal numbers of N-component fermions and bosons, supersymmetric or not, for a large class of interactions, exhibit the same universal ratio. For unequal numbers of fermions and bosons we find that the strong-weak thermodynamic ratio is bounded to lie in between 4/5 and 1.

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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