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arXiv 0912.1933hep-ph
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瞬子真空中的低温手征磁效应(CME)

Chiral magnetic effect (CME) at low temperature from instanton vacuum

Seung-il Nam

摘要:

本文报告了我们目前在低温强磁场作用下的手征磁效应的研究工作。为此,我们使用具有有限瞬数涨落Δ的瞬子真空,它与非平凡拓扑荷Q_t有关。计算了局域手征密度<rho_chi>、手征电荷密度<n_chi>和感应电磁流的真空期望值<j_mu>。我们观察到,纵向电磁电流比横向电磁电流大得多,|j_perp/j_parallel| ~ Q_t,<n_chi>等于|&lt;j_(3,4)&gt;|.它还证明,CME变得不敏感的磁场随着T的增加,因为瞬子效应减少。

英文摘要:

In this talk, we report our present work on the chiral magnetic effect (CME) under a strong magnetic field at low temperature. To this end, we use the instanton vacuum with the finite instanton-number fluctuation Delta, which relates to the nontrivial topological charge Q_t. We compute the vacuum expectation values of the local chiral density <rho_chi>, chiral charge density <n_chi> and induced electromagnetic current <j_mu>. We observed that the longitudinal EM current is much larger than the transverse one, |j_perp/j_parallel| ~ Q_t, and the <n_chi> equals to the |<j_(3,4)>|. It also turns out that the CME becomes insensitive to the magnetic field as T increases, since the instanton effect decreases.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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