摘要翻译:
对于一般外约束下的理想d维费米气体,我们导出了von Weizsacker项在动能密度中的修正系数$(D-2)/3D$。为了得到这个系数,我们在普朗克常数$\hbar$中使用数算子的Kirzhnits半经典展开直到二阶。在这种简单而直接的方法中,我们确定了费米气体密度分布的微分方程和密度泛函。在d=2的情况下,我们发现Kirzhnits梯度修正以$\hbar$为单位全部消失。
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英文标题:
《Kirzhnits gradient expansion for a D-dimensional Fermi gas》
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作者:
Luca Salasnich (CNR-Infm and Cnism)
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最新提交年份:
2007
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分类信息:
一级分类:Physics 物理学
二级分类:Statistical Mechanics 统计力学
分类描述:Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变,热力学,场论,非平衡现象,重整化群和标度,可积模型,湍流
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一级分类:Physics 物理学
二级分类:Other Condensed Matter 其他凝聚态物质
分类描述:Work in condensed matter that does not fit into the other cond-mat classifications
在不适合其他cond-mat分类的凝聚态物质中工作
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英文摘要:
For an ideal D-dimensional Fermi gas under generic external confinement we derive the correcting coefficient $(D-2)/3D$ of the von Weizsacker term in the kinetic energy density. To obtain this coefficient we use the Kirzhnits semiclassical expansion of the number operator up to the second order in the Planck constant $\hbar$. Within this simple and direct approach we determine the differential equation of the density profile and the density functional of the Fermi gas. In the case D=2 we find that the Kirzhnits gradient corrections vanish to all order in $\hbar$.
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PDF链接:
https://arxiv.org/pdf/707.0833


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