Excited-state fidelity as a signal for the many-body localization transition in a disordered Ising chain

	Excited-state fidelity as a signal for the many-body localization transition in a disordered Ising chain
	Hu, T. A.; K. Xue; X. D. Li; Y. Zhang and H. Ren
	2017
发表期刊	Scientific Reports
卷号	7
摘要	In this work, we use exact matrix diagonalization to explore the many-body localization (MBL) transitions in quantum Ising chains with disordered nearest-neighbour couplings, disordered nextnearest-neighbour couplings and disordered external fields. It is demonstrated that the fidelity can be used to characterize the interaction-driven MBL transition in this closed spin system in a manner that is consistent with previous analytical and numerical results. We compute the fidelity for high-energy many-body eigenstates, namely, the excited-state fidelity. It is demonstrated that disordered nearestneighbour couplings, disordered next-nearest-neighbour couplings and disordered external fields each have different effects on the MBL transition. Furthermore, we investigate the MBL transition of a quantum Ising chain with both disordered nearest-neighbour couplings and disordered next-nearestneighbour couplings to see how these two types of disordered couplings drive the occurrence of the MBL transition.
收录类别	sci ; ei
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/58946
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Hu, T. A.,K. Xue,X. D. Li,et al. Excited-state fidelity as a signal for the many-body localization transition in a disordered Ising chain[J]. Scientific Reports,2017,7.
APA	Hu, T. A.,K. Xue,X. D. Li,&Y. Zhang and H. Ren.(2017).Excited-state fidelity as a signal for the many-body localization transition in a disordered Ising chain.Scientific Reports,7.
MLA	Hu, T. A.,et al."Excited-state fidelity as a signal for the many-body localization transition in a disordered Ising chain".Scientific Reports 7(2017).

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