Quantum phase transition, quantum fidelity and fidelity susceptibility in the Yang-Baxter system

	Quantum phase transition, quantum fidelity and fidelity susceptibility in the Yang-Baxter system
	Hu, T. T.; Q. Yang; K. Xue; G. C. Wang; Y. Zhang; X. D. Li and H. Ren
	2017
发表期刊	Quantum Information Processing
卷号	16 期号:1
摘要	In this paper, we investigate the ground-state fidelity and fidelity susceptibility in the many-body Yang-Baxter system and analyze their connections with quantum phase transition. The Yang-Baxter system was perturbed by a twist of e(i phi) at each bond, where the parameter. originates from the q-deformation of the braiding operator U with q = e(-i phi) (Jimbo in Yang-Baxter equations in integrable systems, World Scientific, Singapore, 1990), and phi has a physical significance of magnetic flux (Badurek et al. in Phys. Rev. D 14: 1177, 1976). We test the ground-state fidelity related by a small parameter variation phi which is a different term from the one used for driving the system toward a quantum phase transition. It shows that ground-state fidelity develops a sharp drop at the transition. The drop gets sharper as system size N increases. It has been verified that a sufficiently small value of phi used has no effect on the location of the critical point, but affects the value of F(gc,phi). The smaller the twist phi, the more the value of F(gc,phi) is close to 0. In order to avoid the effect of the finite value of phi, we also calculate the fidelity susceptibility. Our results demonstrate that in the Yang-Baxter system, the quantum phase transition can be well characterized by the ground-state fidelity and fidelity susceptibility in a special way.
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/181722/58947
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. T.,Q. Yang,K. Xue,et al. Quantum phase transition, quantum fidelity and fidelity susceptibility in the Yang-Baxter system[J]. Quantum Information Processing,2017,16(1).
APA	Hu, T. T.,Q. Yang,K. Xue,G. C. Wang,Y. Zhang,&X. D. Li and H. Ren.(2017).Quantum phase transition, quantum fidelity and fidelity susceptibility in the Yang-Baxter system.Quantum Information Processing,16(1).
MLA	Hu, T. T.,et al."Quantum phase transition, quantum fidelity and fidelity susceptibility in the Yang-Baxter system".Quantum Information Processing 16.1(2017).

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