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arXiv 2107.02528hep-thcond-mat.stat-mechhep-lathep-ph
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关于$O(N)$模型中三次与四次相互作用等价性的进一步讨论

More on the cubic versus quartic interaction equivalence in the $O(N)$ model

Oleg Antipin, Jahmall Bersini, Francesco Sannino, Zhi-Wei Wang, Chen Zhang

摘要:

我们计算了一个家庭的固定电荷运营商在红外固定点的$O(N)$模型具有立方相互作用在$d=6-ε$为任意$N$的领导和subleading秩序的收费,但在所有的订单的耦合。结果被用来分析与$O(N)$模型在其紫外固定点显示四次相互作用的简化等价性。这是通过将三次模型缩放尺寸与四次模型的已知大$N$结果进行比较并证明它们匹配来执行的。我们的结果加强了约束等价性,并进一步提供了新的信息,有限的$N$物理源于计算的立方模型略低于6维。

英文摘要:

We compute the scaling dimensions of a family of fixed-charge operators at the infrared fixed point of the $O(N)$ model featuring cubic interactions in $d=6-ε$ for arbitrary $N$ to leading and subleading order in the charge but to all orders in the couplings. The results are used to analyze the conjectured equivalence with the $O(N)$ model displaying quartic interactions at its ultraviolet fixed point. This is performed by comparing the cubic model scaling dimensions against the known large $N$ results for the quartic model and demonstrating that they match. Our results reinforce the conjectured equivalence and further provide novel information on the finite $N$ physics stemming from the computations in the cubic model just below 6 dimensions.

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