摘要翻译:
本文介绍了利用图解蒙特卡罗和随机优化新方法获得的电子-声子耦合系统基态和激发态的最新进展,这些新方法使松原格林函数在虚时间内的无近似计算和对实频率的无偏解析延拓得以实现。本文给出了t-J模型中Frohlich极化子、Rashba-Pekar激子-极化子、伪Jahn-Teller极化子、激子以及与声子空穴相互作用等强关联系统的基态性质、Lehmann谱函数和光学电导率的精确数值结果。
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英文标题:
《Spectroscopic Properties of Polarons in Strongly Correlated Systems by
Exact Diagrammatic Monte Carlo Method》
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作者:
A. S. Mishchenko (1 and 2) and N. Nagaosa (1 and 3) ((1) CREST, Japan
Science and Technology Agency, (2) Russian Research Centre ``Kurchatov
Institute'', (3) The University of Tokyo)
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最新提交年份:
2007
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分类信息:
一级分类:Physics 物理学
二级分类:Strongly Correlated Electrons 强关联电子
分类描述:Quantum magnetism, non-Fermi liquids, spin liquids, quantum criticality, charge density waves, metal-insulator transitions
量子磁学,非费米液体,自旋液体,量子临界性,电荷密度波,金属-绝缘体跃迁
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一级分类:Physics 物理学
二级分类:Statistical Mechanics 统计力学
分类描述:Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变,热力学,场论,非平衡现象,重整化群和标度,可积模型,湍流
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英文摘要:
We present recent advances in understanding of the ground and excited states of the electron-phonon coupled systems obtained by novel methods of Diagrammatic Monte Carlo and Stochastic Optimization, which enable the approximation-free calculation of Matsubara Green function in imaginary times and perform unbiased analytic continuation to real frequencies. We present exact numeric results on the ground state properties, Lehmann spectral function and optical conductivity of different strongly correlated systems: Frohlich polaron, Rashba-Pekar exciton-polaron, pseudo Jahn-Teller polaron, exciton, and interacting with phonons hole in the t-J model.
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PDF链接:
https://arxiv.org/pdf/704.0025