Two-particle fluctuations in one-dimensional generalized Landau liquids.
Two-particle fluctuations in one-dimensional generalized Landau liquids.
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一维广义朗道液体中的两粒子涨落。
DOI：
10.1103/physrevb.46.14728
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
Ovchinnikov
中科院分区：
文献类型：
--
作者：
Carmelo;Horsch;Ovchinnikov
利用磁场中哈伯德链低能本征态谱的朗道液体性质，研究了它的两粒子谱性质。出现的图像是两种耦合的赝粒子流体的气体。推导了支配赝粒子流动的动力学方程。宏观流用基本赝粒子流表示。作为中心结果，我们在零动量极限下计算了在基态上应用上自旋和下自旋密度涨落算符所得到的电子激发的Have函数
We use the Landau-liquid character of the low-energy eigenstate spectrum of the Hubbard chain in a magnetic field to investigate its two-particle spectral properties. The picture that emerges is that of a gas of two coupled fluids of pseudoparticles. The kinetic equations that govern the flow of pseudoparticles are derived. The macroscopic currents are expressed in terms of the elementary pseudoparticle currents. As a central result we evaluate in the limit of zero momentum the have function for the electronic excitations obtained by applying the up-spin and down-spin density-fluctuation operators on the ground state