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arXiv 1004.4353cond-mat.str-el
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一维格点中粒子与费米子相互作用的非线性响应

On the nonlinear response of a particle interacting with fermions in a 1D lattice

X. Zotos

摘要:

用Bethe近似方法研究了一维晶格中粒子与等质量费米子(或硬核玻色子)局域相互作用的能量色散。我们专注于布洛赫振荡的周期,这原来是有关的费米海的费米波矢,特别是在如何出现这种分散作为一个集体效应的热力学极限。我们通过对称性证明了半满系统的色散与温度无关。我们还讨论了粒子对外加场的绝热相干集体响应。

英文摘要:

By the Bethe ansatz method we study the energy dispersion of a particle interacting by a local interaction with fermions (or hard core bosons) of equal mass in a one dimensional lattice. We focus on the period of the Bloch oscillations which turns out to be related to the Fermi wavevector of the Fermi sea and in particular on how this dispersion emerges as a collective effect in the thermodynamic limit. We show by symmetry that the dispersion is temperature independent for a half-filled system. We also discuss the adiabatic coherent collective response of the particle to an applied field.

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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