Spectral function of the two-dimensional Hubbard model: A density matrix renormalization group plus cluster perturbation theory study

Chun Yang; Adrian E. Feiguin

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Spectral function of the two-dimensional Hubbard model: A density matrix renormalization group plus cluster perturbation theory study

机译：二维Hubbard模型的光谱函数：密度矩阵重归一化群加簇扰动理论研究

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We study the spectral function of the two-dimensional Hubbard model using cluster perturbation theory, and a density matrix renormalization group as a cluster solver. We reconstruct the two-dimensional dispersion at and away from half-filling using 2 × L ladders, with L up to 80 sites, yielding results with unprecedented resolution in excellent agreement with quantum Monte Carlo. The main features of the spectrum can be described with a mean-field dispersion, with kinks and pseudogap traced back to scattering between spin and charge degrees of freedom.

机译：我们使用簇扰动理论和密度矩阵重归一化群作为簇求解器研究二维哈伯德模型的谱函数。我们使用2×L梯子在L处填充了多达80个位点，从而在半填充处和远离半填充处重建了二维色散，与量子蒙特卡洛法产生了极好的一致性，从而获得了前所未有的分辨率。频谱的主要特征可以用平均场色散来描述，扭结和伪间隙可以追溯到自旋和电荷自由度之间的散射。

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《Physical review》 |2016年第8期|081107.1-081107.5|共5页
作者
Chun Yang; Adrian E. Feiguin;
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Department of Physics, Northeastern University, Boston, Massachusetts 02115, USA;

Department of Physics, Northeastern University, Boston, Massachusetts 02115, USA;

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1. Spectral function of the two-dimensional Hubbard model: A density matrix renormalization group plus cluster perturbation theory study [J] . Yang Chun, Feiguin Adrian E. Physical review, B . 2016,第8期

机译：二维Hubbard模型的光谱函数：密度矩阵重归一化群加簇扰动理论研究
2. Low-energy excitations of the one-dimensional half-filled SU(4) Hubbard model with an attractive on-site interaction: Density-matrix renormalization-group calculations and perturbation theory [J] . Jize Zhao, Kazuo Ueda, Xiaoqun Wang Physical review. B, Condensed Matter And Materials Physics . 2006,第23期

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3. Chiral Mott insulators in frustrated Bose-Hubbard models on ladders and two-dimensional lattices: A combined perturbative and density matrix renormalization group study [J] . Christian Rumen, Andreas M. Laeuchli Physical review . 2018,第5期

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4. PARALLEL COMPUTING OF DIRECTLY-EXTENDED DENSITY-MATRIX RENORMALIZATION GROUP TO TWO-DIMENSIONAL STRONGLY CORRELATED QUANTUM SYSTEMS [C] . Susumu YAMADA, Masahiko Okumura, Masahiko MACHIDA IASTED International Conference on Parallel and Distributed Computing and Networks . 2008

机译：直接延伸密度 - 矩阵重新定位组直接计算二维强相相关量子系统
5. Perturbation Theories Based on the Density Matrix Renormalization Group [D] . Guo, Sheng. 2018

机译：基于密度矩阵重归一化群的摄动理论
6. Quantum cluster size and solvent polarity effects on the geometries and Mössbauer properties of the active site model for ribonucleotide reductase intermediate X: a density functional theory study [O] . Wen-Ge Han, Louis Noodleman -1

机译：量子簇尺寸和溶剂极性对核糖核苷酸还原酶中间体X的活性位点模型的几何形状和Mössbauer性质X：密度泛函理论研究
7. Spectral function of the two-dimensional Hubbard model: A density matrix renormalization group plus cluster perturbation theory study [O] . Chun Yang, Adrian E. Feiguin 2016

机译：二维Hubbard型号的光谱函数：密度矩阵重新定化组加集群扰动理论研究
8. Density matrix renormalization group calculation of correlation functions in one dimensional Hubbard model [R] . Qin Shaojin, Su Zhaobin, Liang Shoudan, 1995

机译：一维Hubbard模型中相关函数的密度矩阵重整化群计算

Spectral function of the two-dimensional Hubbard model: A density matrix renormalization group plus cluster perturbation theory study

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