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arXiv 2504.03413hep-phnucl-th
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手性螺旋的精确 Wigner 函数

Exact Wigner function for chiral spirals

Samapan Bhadury, Wojciech Florkowski, Sudip Kumar Kar, Valeriya Mykhaylova

AI总结:

本文利用手性螺旋中 Dirac 方程的精确解导出 Wigner 函数精确公式,揭示半经典展开无法描述的性质,并据此分析自旋极化及轴流联系。

摘要:

费米子与外部周期性手性凝聚体(手性螺旋)耦合时 Dirac 方程的精确解,被用于获得 Wigner 函数的精确公式(不计量子圈修正)。我们发现,所得 Wigner 函数各系数的表达式表现出标准半经典展开无法重现的性质。Wigner 函数轴矢量分量的公式可方便地用于研究自旋极化效应,并阐明自旋密度矩阵与轴流之间的联系。特别地,我们发现,在周期势绝热转变为均匀势的过程中,极化矢量相对于其初始方向发生扭转。

英文摘要:

The exact solution of the Dirac equation for fermions coupled to an external periodic chiral condensate (chiral spiral) is used to obtain the exact formula for the Wigner function (up to the quantum loop corrections). We find that the resulting expressions for various coefficients of the Wigner function exhibit properties that cannot be reproduced within the standard semiclassical expansion. The formula for the axial vector component of the Wigner function can be conveniently used to study spin polarization effects and illustrate connections between the spin density matrix and axial current. In particular, we find that during an adiabatic change of the periodic potential into a uniform one, the polarization vector is twisted from its original direction.

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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