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arXiv 1712.09780nucl-th
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磁催化效应与手性旋转效应的竞争

Competition between magnetic catalysis effect and chiral rotation effect

Lingxiao Wang, Gaoqing Cao

摘要:

在有效Nambu-Jona-Lasinio模型下,我们研究了一般平行电磁场中磁催化效应与手征旋转效应之间的竞争。对于给定的零温电场$E$,质量间隙随磁场$B$的增加呈现出三种不同的特征:单调增加、先增加后减少和单调减少.利用强磁场近似,说明这是由于磁场诱导的催化效应和手性旋转效应之间的竞争,并发现了一个临界电场$\sqrt{eE_c}=86.4~{\rm MeV}$,超过该电场,质量间隙将最终减小到大的$B$.由于只有大磁场与推导有关,临界电场不依赖于温度$T$或化学势$μ$。

英文摘要:

In this work, we explore the competition between magnetic catalysis effect and chiral rotation effect in a general parallel electromagnetic field within the effective Nambu--Jona-Lasinio model. For a given electric field $E$ at zero temperature, the mass gap shows three different features with respect to an increasing magnetic field $B$: increasing monotonically, decreasing after increasing and decreasing monotonically. By making use of strong magnetic field approximation, we illuminate that this is due to the competition between catalysis effect and chiral rotation effect induced both by the magnetic field, and a critical electric field $\sqrt{eE_c}=86.4~{\rm MeV}$ is found beyond which the mass gap will eventually decrease at large $B$. As only large magnetic field is relevant for the derivation, the critical electric field does not depend on the temperature $T$ or chemical potential $μ$.

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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