Geometrically induced magnetic catalysis and critical dimensions

Antonino Flachi, Kenji Fukushima, Vincenzo Vitagliano

研究成果: Article査読

7 被引用数 (Scopus)

抄録

We discuss the combined effect of magnetic fields and geometry in interacting fermionic systems. At leading order in the heat-kernel expansion, the infrared singularity (that in flat space leads to the magnetic catalysis) is regulated by the chiral gap effect, and the catalysis is deactivated by the effect of the scalar curvature. We discover that an infrared singularity is found in higher-order terms that mix the magnetic field with curvature, and these lead to a novel form of geometrically induced magnetic catalysis. The dynamical mass squared is then modified not only due to the chiral gap effect by an amount proportional to the curvature, but also by a magnetic shift (4-D)eB, where D represents the number of space-time dimensions. We argue that D=4 is a critical dimension across which the behavior of the magnetic shift changes qualitatively.

本文言語English
論文番号181601
ジャーナルPhysical review letters
114
18
DOI
出版ステータスPublished - 2015 5 4
外部発表はい

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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