Abstract
The “QCD Kondo effect” stems from the color exchange interaction in QCD with non-Abelian property, and can be realized in a high-density quark matter containing heavy-quark impurities. We propose a novel type of the QCD Kondo effect induced by a strong magnetic field. In addition to the fact that the magnetic field does not affect the color degrees of freedom, two properties caused by the Landau quantization in a strong magnetic field are essential for the “magnetically induced QCD Kondo effect”; (1) dimensional reduction to -dimensions, and (2) finiteness of the density of states for lowest energy quarks. We demonstrate that, in a strong magnetic field , the scattering amplitude of a massless quark off a heavy quark impurity indeed shows a characteristic behavior of the Kondo effect. The resulting Kondo scale is estimated as where and are the fine structure constant of strong interaction and the number of colors in QCD, and is the electric charge of light quarks.
- Received 2 October 2015
DOI:https://doi.org/10.1103/PhysRevD.94.074013
© 2016 American Physical Society