Heavy-quark spin polarization induced by the Kondo effect in a magnetic field
Heavy-quark spin polarization induced by the Kondo effect in a magnetic field
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DOI：
10.1103/physrevd.105.074028
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发表时间：
2021-09
影响因子：
5
通讯作者：
Daiki Suenaga;Y. Araki;Kei Suzuki;S. Yasui
中科院分区：
文献类型：
--
作者：
Daiki Suenaga;Y. Araki;Kei Suzuki;S. Yasui
本文提出了在外加磁场作用下近藤效应诱导夸克物质中重夸克自旋极化（HQSP）的新机制。近藤效应是由重夸克和轻夸克之间的一种凝聚引起的，这种凝聚被称为近藤凝聚，导致重夸克和轻夸克自旋的混合。因此，HQSP是由轻夸克与夸克物质中的磁场耦合产生的近藤效应驱动的。为了证明这一点，我们在磁场下采用Nambu-Jona-Lasinio型模型，研究了U (1) EM电磁规范不变性所要求的顶点修正线性响应理论中的HQSP。结果发现，随着近藤效应的出现，HQSP显著上升。我们的发现在未来无符号问题的晶格模拟中是可测试的。
We propose a new mechanism of the heavy-quark spin polarization (HQSP) in quark matter induced by the Kondo effect under an external magnetic field. The Kondo effect is caused by a condensate between a heavy and a light quark called the Kondo condensate leading to a mixing of the heavy- and light-quark spins. Thus, the HQSP is driven through the Kondo effect from light quarks coupling with the magnetic field in quark matter. For demonstration, we employ the Nambu-Jona-Lasinio type model under a magnetic field and investigate the HQSP within the linear response theory with vertex corrections required by the U (1) EM electromagnetic gauge invariance. As a result, we find that the HQSP arises significantly with the appearance of the Kondo effect. Our findings are testable in future sign-problem-free lattice simulations.