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arXiv 1106.6035cond-mat.quant-gashep-thnucl-th
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从算子乘积展开计算二维和三维费米气体的电流响应、结构因子和流体力学量

Current response, structure factor and hydrodynamic quantities of a two- and three-dimensional Fermi gas from the operator-product expansion

Johannes Hofmann

摘要:

我们应用算子乘积展开确定了二维和三维费米气体电流响应的渐近形式。远离单粒子峰的首阶项与称为接触的量成比例,其系数精确确定。我们还计算了动力学结构因子和作为散射长度的函数的光谱粘度的高频尾部。我们的结果被用来导出某些总和规则的粘度。

英文摘要:

We apply the operator-product expansion to determine the asymptotic form of the current response of a Fermi gas in two and three dimensions. The leading-order term away from the one-particle peak is proportional to a quantity known as the contact, the coefficient of which is determined exactly. We also calculate the dynamic structure factor and the high-frequency tails of the spectral viscosities as a function of the scattering length. Our results are used to derive certain sum rules for the viscosities.

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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