Emergent QCD Kondo effect in two-flavor color superconducting phase

Emergent QCD Kondo effect in two-flavor color superconducting phase
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双味彩色超导相中的涌现QCD近藤效应

DOI:
10.1103/physrevd.99.094044
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发表时间:
2019-03
期刊:
影响因子:
5
通讯作者:
Pisarski Robert D
Pisarski Robert D
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Hattori Koichi;Huang Xu Guang;Pisarski Robert D

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我们证明了双味色超导(2SC)相中未闭合夸克和闭合夸克之间的有效耦合强度通过对数量子修正被重新规范化。对于携带不同色荷的胶子交换产生的两种不同的有效耦合强度,我们得到了一组耦合重正化群(RG)方程。RG流图表明,当我们向费米表面减小能量尺度时,两种耦合强度都演化为强耦合状态。这是在近藤效应中观察到的一种特征行为,已知在通过非阿贝尔相互作用存在杂质散射时发生。我们提出了一种新的近藤效应,在没有掺杂杂质的情况下出现,但具有间隙准激发和2SC相固有的残余SU(2)色亚群,我们称之为2SC近藤效应。
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. We obtain a set of coupled renormalization-group (RG) equations for two distinct effective coupling strengths arising from gluon exchanges carrying different color charges. The diagram of RG flow suggests that both of the coupling strengths evolve into a strong-coupling regime as we decrease the energy scale toward the Fermi surface. This is a characteristic behavior observed in the Kondo effect, which has been known to occur in the presence of impurity scatterings 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.
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发表时间: 1970-01-01
期刊: PHYSICAL REVIEW B-SOLID STATE
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