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Pauli-term-induced fixed points in d-dimensional QED
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DOI：10.1140/epjc/s10052-023-12080-y.png)
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Abstract
En 中文
We explore the fixed-point structure of QED-like theories upon the inclusion of a Pauli spin-field coupling. We concentrate on the fate of UV-stable fixed points recently dis-covered in d=4 spacetime dimensions upon generalizations to lower as well as higher dimensions for an arbitrary number of fermion flavors N-f. As an overall trend, we observe that going away from d=4 dimensions and increasing the flavor number tends to destabilize the non-Gaussian fixed points discovered in four spacetime dimensions. A notable exception is a non-Gaussian fixed point at finite Pauli spin-field coupling but vanishing gauge coupling, which also remains stable down to d=3 dimensions and for small flavor numbers. This includes also the range of degrees of freedom used in effective theories of layered condensed-matter systems. As an application, we construct renormalization group trajectories that emanate from the non-Gaussian fixed point and approach a long-range regime in the conventional QED(3 )universality class that is governed by the interacting (quasi) fixed point in the gauge coupling
Keywords:
DYNAMIC-MASS GENERATION
EXACT RENORMALIZATION-GROUP
SYMMETRY-BREAKING
CRITICAL-BEHAVIOR
RG
Journal
IF:
4.8
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1.8W
Citations:
4.7W