A Density-Matrix Renormalization Group Study of a One-Dimensional Incommensurate Quantum Frenkel-Kontorova Model

被引：2
|
作者：
Ma, Yongjun [1 ,2 ]
Wang, Jiaxiang [1 ,2 ]
Xu, Xinye [1 ,2 ]
Wei, Qi [1 ,2 ]
Zhu, Wenjun [3 ]
Kais, Sabre [4 ,5 ,6 ]
机构：
[1] E China Normal Univ, State Key Lab Precis Spect, Shanghai 200062, Peoples R China
[2] E China Normal Univ, Dept Phys, Shanghai 200062, Peoples R China
[3] Natl Key Lab Shock Wave & Detonat Phys, Mianyang 621900, Sichuan, Peoples R China
[4] Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA
[5] Purdue Univ, Dept Phys, W Lafayette, IN 47907 USA
[6] Qatar Fdn, Qatar Environm & Energy Res Inst, Doha, Qatar
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2014年 / 83卷 / 09期
基金：
中国国家自然科学基金;
关键词：
PHASE-TRANSITION; STATE; ENTANGLEMENT; CHAIN;
D O I：
10.7566/JPSJ.83.094605
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In this work, the one-dimensional incommensurate quantum Frenkel-Kontorova model is investigated using a density-matrix renormalization group algorithm. Special attention is given to the entanglement and ground-state energy. The energy gap between ground state and the first excited state is also calculated. From all the numerical results, we have observed clear property changes from the pinned state to the sliding state as the amount of quantum fluctuation is increased. However, no expected quantum critical point can be justified by the present data.
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页数：6
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