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arXiv 1209.3874cond-mat.str-el
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多组分Luttinger液体的响应函数

Response functions in multicomponent Luttinger liquids

E. Orignac, R. Citro

摘要:

本文导出了不同速度下多组分Luttinger液体密度-密度关联函数的零温傅里叶变换的解析表达式。利用Schwinger恒等式和推广的Feynman恒等式,导出了精确的积分表达式,并给出了各分量奇异点附近频率的近似解析形式。我们找到幂型奇点并计算相应的指数。数值结果显示的情况下,三个组件。

英文摘要:

We derive an analytic expression for the zero temperature Fourier transform of the density-density correlation function of a multicomponent Luttinger liquid with different velocities. By employing Schwinger identity and a generalized Feynman identity exact integral expressions are derived, and approximate analytical forms are given for frequencies close to each component singularity. We find power-like singularities and compute the corresponding exponents. Numerical results are shown for the case of three components.

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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