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arXiv 2408.08155math-phcond-mat.str-elmath.MP
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贝塞尔函数乘积的积分:来自布洛赫电子物理学的洞见

Integrals of Products of Bessel Functions: An Insight from the Physics of Bloch Electrons

University of Florida(佛罗里达大学)

Joshua Covey, Dmitrii L. Maslov

AI总结:

该研究从布洛赫电子的态密度与倒逆散射率角度,解释了贝塞尔函数乘积积分在特定参数下恒为零的物理机制,揭示了数学特性与凝聚态物理现象的关联。

摘要:

贝塞尔函数乘积的积分展现出一个引人关注的特性:在被积函数参数满足特定条件时,它们会恒等于零。我们在晶格电子(即“布洛赫电子”)的单粒子性质与多体性质的背景下,从其态密度和倒逆散射率的角度,为这一特性提供了物理解释。(在倒逆事件中,两个碰撞电子的动量变化等于一个倒格矢,这会因电子-电子相互作用产生有限电阻率。)在此背景下,积分消失的原因很简单:要么是电子能量处于允许电子波自由传播的能带之外,导致态密度为零;要么是由于费米面小于临界值,倒逆过程在运动学上被禁止。

英文摘要:

Integrals of products of Bessel functions exhibit an intriguing feature: under certain conditions on the parameters specifying the integrand, they vanish identically. We provide a physical interpretation of this feature in the context of both single-particle and many-body properties of electrons on a lattice (``Bloch electrons''), namely, in terms of their density of states and umklapp scattering rate. (In an umklapp event, the change in the momentum of two colliding electrons is equal to a reciprocal lattice vector, which gives rise to a finite resistivity due to electron-electron interaction.) In this context, the vanishing of an integral follows simply from the condition that either the density of states vanishes due to the electron energy lying outside the band in which free propagation of electron waves is allowed, or that an umklapp process is kinematically forbidden due to the Fermi surface being smaller than a critical value.

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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