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arXiv 1503.09136hep-thcond-mat.stat-mechcond-mat.str-el
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临界态下的多介子汤川相互作用

Multi-meson Yukawa interactions at criticality

Gian Paolo Vacca, Luca Zambelli

摘要:

本文讨论了相对论性$\mathbb{Z}_2$对称Yukawa模型在零温度和零密度下的临界行为,其中费米子自由度和时空维数是连续的,重点讨论了多介子交换在Yukawa扇区中所起的作用.我们认为,这应该考虑到一般的研究的基础上的功能重整化群,无论是在四维高能模型或低维凝聚态系统。通过后一种方法,我们描述了生成的多临界模型在小于三个维度,无论是在无限和有限数量的口味。我们还提供了不同的估计的临界指数的手征伊辛普适类在三维空间中的各种领域的内容,从一对夫妇的狄拉克费米子的超对称理论与一个单一的马约拉纳旋量。

英文摘要:

The critical behavior of a relativistic $\mathbb{Z}_2$-symmetric Yukawa model at zero temperature and density is discussed for a continuous number of fermion degrees of freedom and of spacetime dimensions, with emphasis on the role played by multi-meson exchange in the Yukawa sector. We argue that this should be generically taken into account in studies based on the functional renormalization group, either in four-dimensional high-energy models or in lower-dimensional condensed-matter systems. By means of the latter method, we describe the generation of multi-critical models in less then three dimensions, both at infinite and finite number of flavors. We also provide different estimates of the critical exponents of the chiral Ising universality class in three dimensions for various field contents, from a couple of massless Dirac fermions down to the supersymmetric theory with a single Majorana spinor.

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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