arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1703.04830hep-thcond-mat.stat-mech
收藏

d>2中多临界模型的前导CFT约束

Leading CFT constraints on multi-critical models in d>2

Alessandro Codello, Mahmoud Safari, Gian Paolo Vacca, Omar Zanusso

摘要:

考虑一类自相互作用势为最高单项$ϕ^{m}$且低于其上临界维数$d_c=\frac{2m}{m-2}$的可重正化标量QFT,并结合CFT约束、Schwinger-Dyson方程和上临界维数处的自由理论行为对它们进行了研究.对于偶数$m \ge 4$,这些理论与Landau-Ginzburg对多临界现象的描述相一致,并与$d=2$中的酉极小模型相插值,而对于奇数$m$,这些理论是非酉的,并从$m=3$开始,具有李-杨普适性类。对于所有的甚至潜力和李杨普适性类,我们展示了如何共形不变性的假设是足够的计算局部运营商$ϕ^k$和一些家庭的结构常数的耦合的或$ε$ -扩展的标度尺寸。对于所有其他的奇数位,我们表示一些标度尺寸和结构常数的耦合的展开。

英文摘要:

We consider the family of renormalizable scalar QFTs with self-interacting potentials of highest monomial $ϕ^{m}$ below their upper critical dimensions $d_c=\frac{2m}{m-2}$, and study them using a combination of CFT constraints, Schwinger-Dyson equation and the free theory behavior at the upper critical dimension. For even integers $m \ge 4$ these theories coincide with the Landau-Ginzburg description of multi-critical phenomena and interpolate with the unitary minimal models in $d=2$, while for odd $m$ the theories are non-unitary and start at $m=3$ with the Lee-Yang universality class. For all the even potentials and for the Lee-Yang universality class, we show how the assumption of conformal invariance is enough to compute the scaling dimensions of the local operators $ϕ^k$ and of some families of structure constants in either the coupling's or the $ε$-expansion. For all other odd potentials we express some scaling dimensions and structure constants in the coupling's expansion.

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。

↑