Detection of Quantum Phase Transition by Excited State

被引：0
|
作者：
Qiao, Jie [1 ]
Jie, Quanlin [1 ]
机构：
[1] Wuhan Univ, Dept Phys, Wuhan 430072, Peoples R China
来源：
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2021年 / 90卷 / 09期
关键词：
D O I：
10.7566/JPSJ.90.094705
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We detect the quantum phase transition of the ground state from the excited state by using the cluster density matrix embedding theory to calculate the excited state of the J1 - J2 model. By analyzing the excitation energy gap of the transformation in the system, we detect that the critical point of the intermediate phase of ground state is J2 ' 0.5. With the increase of energy, the new valence bond solid (VBS) order appears in the excited state, which is different from that in the ground state.
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页数：6
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