利用Λ型原子与光场的纠缠态传送腔场的奇偶相干态的叠加态

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摘要：根据简并Λ型三能级原子与单模光场的非共振相互作用系统的改进型有效哈密顿量，利用矩阵方法推导出任意初始情况下原子-光场系统的波函数，通过改变相互作用时间，制备出原子-腔场系统的纠缠态.提出利用原子-腔场系统的纠缠态进行概率传送腔场的奇、偶相干态的叠加态的有效方案.对于振幅很大的单模光场，通过实行Bell态测量，能成功地概率传送腔场的奇偶相干态的叠加态，其成功的总概率为0.25.
关键词：简并Λ型三能级原子波函数非共振相互作用概率量子隐形传态奇偶相干态的叠加态

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	戴宏毅
	陈平形
	梁林梅
	李承祖

Abstract： Based on the modified effective Hamiltonian for the system which is made up of a degenerate Λ-type three-level atom and a single-mode coherent state cavity field,the wave function of the system for the arbitrary initial states is derived by means of matrix forms. Through changing the interaction time,the entangled state of an atom-field is prepared. A feasible scheme is proposed to probabilistically teleport superpositions of even and odd coherent states of the cavity field by using the entangled state of a degenerate Λ-type three-level atom interacting with a coherent state cavity field of large amplitude under a far-off resonant condition. By performing Bell state measurement, the superpositions of even and odd coherent states of the cavity field can be successfully achieved with a total probability of 0.25.
Keywords： a degenerate Λ-type three-level atom wave function;far-off resonant interaction probabilistic quantum teleportation superposition of even and odd coherent states

收稿日期: 2002-10-23 出版日期: 2005-04-18

PACS:	PACC:4250
	0365

基金: 国家自然科学基金(批准号：)资助的课题.

引用本文:

戴宏毅,陈平形,梁林梅等 . 利用Λ型原子与光场的纠缠态传送腔场的奇偶相干态的叠加态. 物理学报, 2004, 53(2): 444.

Cite this article:

Dai Hong-Yi,Chen Ping-Xing,Liang Lin-Mei et al. Teleporting superpositions of even and odd coherent states of a cavity field via the entangled state of a degenerate Λ-type atom interacting with the cavity field. Acta Phys. Sin., 2004, 53(2): 441-444.

URL:

http://wulixb.iphy.ac.cn/CN/Y2004/V53/I2/441