Bernhard Ihrig
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View article: Fractionalized quantum criticality in spin-orbital liquids from field theory beyond the leading order
Fractionalized quantum criticality in spin-orbital liquids from field theory beyond the leading order Open
Two-dimensional spin-orbital magnets with strong exchange frustration have\nrecently been predicted to facilitate the realization of a quantum critical\npoint in the Gross-Neveu-SO(3) universality class. In contrast to previously\nknown Gr…
View article: Abelian Higgs model at four loops, fixed-point collision, and deconfined criticality
Abelian Higgs model at four loops, fixed-point collision, and deconfined criticality Open
The Abelian Higgs model is the textbook example for the superconducting transition and the Anderson-Higgs mechanism, and has become pivotal in the description of deconfined quantum criticality. We study the Abelian Higgs model with n compl…
View article: Critical behavior of Dirac fermions from perturbative renormalization
Critical behavior of Dirac fermions from perturbative renormalization Open
Gapless Dirac fermions appear as quasiparticle excitations in various condensed-matter systems. They feature quantum critical points with critical behavior in the 2+1 dimensional Gross-Neveu universality class. The precise determination of…
View article: Gross-Neveu-Yukawa model at three loops and Ising critical behavior of Dirac systems
Gross-Neveu-Yukawa model at three loops and Ising critical behavior of Dirac systems Open
Dirac and Weyl fermions appear as quasi-particle excitations in many different condensed-matter systems. They display various quantum transitions which represent unconventional universality classes related to the variants of the Gross-Neve…