QQ客服 官方微博 反馈留言

	Induced entanglement enhanced by quantum criticality
	Ai, Qing ; Shi, Tao ; Long, Guilu ; Sun, C. P.
	2010-05-06 ; 2010-05-06
关键词	RENORMALIZATION-GROUPS SUPERCONDUCTIVITY CHAINS Optics Physics, Atomic, Molecular & Chemical
中文摘要	Two-qubit entanglement can be induced by a quantum data bus interacting with them. In this paper, with the quantum spin chain in the transverse field as an illustration of the quantum data bus, we show that such induced entanglement can be enhanced by the quantum phase transition (QPT) of the quantum data bus. We consider two external spins simultaneously coupled to a transverse field Ising chain. By adiabatically eliminating the degrees of the chain, the effective coupling between these two spins is obtained. The matrix elements of the effective Hamiltonian are expressed in terms of the dynamical structure factor (DSF) of the chain. The DSF is the Fourier transformation of the Green function of an Ising chain and can be calculated numerically by a method introduced by Derzhko and Krokhmalskii [Phys. Rev. B 56, 11659 (1997)]. Since all characteristics of QPT are embodied in the DSF, the dynamical evolution of the two external spins displays singularity in the vicinity of the critical point.
语种	英语 ; 英语
出版者	AMER PHYSICAL SOC ; COLLEGE PK ; ONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/15167]
专题	清华大学
推荐引用方式 GB/T 7714	Ai, Qing,Shi, Tao,Long, Guilu,et al. Induced entanglement enhanced by quantum criticality[J],2010, 2010.
APA	Ai, Qing,Shi, Tao,Long, Guilu,&Sun, C. P..(2010).Induced entanglement enhanced by quantum criticality..
MLA	Ai, Qing,et al."Induced entanglement enhanced by quantum criticality".(2010).

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。