24-26 June 2019
Bunkyo School Building, Tokyo Campus, University of Tsukuba
Japan timezone

The Kondo effect in dense QCD

24 Jun 2019, 14:40
25m
134 (Bunkyo School Building, Tokyo Campus, University of Tsukuba)

134

Bunkyo School Building, Tokyo Campus, University of Tsukuba

3-29-1 Otsuka Bunkyo-ku Tokyo 112-0012 Japan
Oral talk Session 3

Speaker

Dr Koichi Hattori (Yukawa Institute, Kyoto University)

Description

We discuss Kondo effect occurring in dense QCD [1,2]. Based on the renormalization-group analysis, we show that effective coupling strengths between ungapped and gapped quarks in the two-flavor color superconducting (2SC) phase are renormalized by logarithmic quantum corrections, which drives the system into a strongly coupled regime [2]. This is a characteristic behavior observed in the Kondo effect, which has been known to occur in the presence of impurity catterings via non-Abelian interactions. We propose a novel Kondo effect emerging without doped impurities, but with the gapped quasiexcitations and the residual SU(2) color subgroup intrinsic in the 2SC phase, which we call the 2SC Kondo effect [2]. The Kondo effect is a consequence of the dimensional reduction near the Fermi surface, and an analogous dimensional reduction in a strong magnetic field is also known to induce similar phenomena [3, 4]. [1] Hattori, Itakura, Ozaki, Yasui, "QCD Kondo effect: quark matter with heavy-flavor impurities," Phys.Rev. D92 (2015) 065003. [2] Hattori, Huang, Pisarski, "Emergent QCD Kondo effect in two-flavor color superconducting phase," [arXiv:1903.10953 [hep-ph]]. [3] Gusynin, Miransky, Shovkovy, "Dimensional reduction and dynamical chiral symmetry breaking by a magnetic field in (3+1)-dimensions," Phys.Lett. B349 (1995) 477-483. [4] Ozaki, Itakura, Kuramoto, "Magnetically induced QCD Kondo effect," Phys.Rev. D94 (2016) 074013.

Primary author

Dr Koichi Hattori (Yukawa Institute, Kyoto University)

Presentation Materials