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Generating a four-photon polarization-entangled cluster state with homodyne measurement via cross-Kerr nonlinearity
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作者 苏石磊 王媛 +2 位作者 郭奇 王洪福 张寿 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第4期308-314,共7页
We propose a protocol to generate a four-photon polarization-entangled cluster state with cross-Kerr nonlinearity by using the interference of polarized photons. The protocol is based on optical elements, cross-Kerr n... We propose a protocol to generate a four-photon polarization-entangled cluster state with cross-Kerr nonlinearity by using the interference of polarized photons. The protocol is based on optical elements, cross-Kerr nonlinearity, and homodyne measurement, therefore it is feasible with current experimental technology, The success probability of our protocol is optimal, this property makes our protocol more efficient than others in the applications of quantum communication. 展开更多
关键词 cluster state homodyne measurement cross-kerr nonlinearity
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Efficient preparation of a four-photon cluster state with homodyne measurement via cross-Kerr nonlinearity
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作者 ZHAO ChunRan YE Liu 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS 2011年第3期479-483,共5页
A scheme is proposed for generating a multiphoton entangled cluster state among four modes. The scheme only uses Kerr medium, beam splitter and homodyne measurements on coherent light fields, which can be efficiently ... A scheme is proposed for generating a multiphoton entangled cluster state among four modes. The scheme only uses Kerr medium, beam splitter and homodyne measurements on coherent light fields, which can be efficiently made in quantum optical laboratories. The photon in the signal mode is prepared in a superposition state of the vacuum state and one-photon state while the probe beam is initially set in a coherent state superposition. The strong probe mode interacts successively with multiple signal-mode photons, each causing a conditional phase rotation in the probe mode. Subsequent momentum quadrature homodyne measurement of the probe mode will project the photons in the signal mode into the desired entangled states. It is shown that under certain conditions, the four-photon cluster state can be generated with high fidelity and high success probability, and the scheme is feasible by current experimental technology. 展开更多
关键词 cluster state cross-kerr nonlinearity homodyne measurement entanglement
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Generation of hyperentangled four-photon cluster state via cross-Kerr nonlinearity
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作者 闫香 於亚飞 张智明 《Chinese Physics B》 SCIE EI CAS CSCD 2014年第6期51-55,共5页
We propose a scheme for generating a hyperentangled four-photon cluster state that is simultaneously entangled in polarization modes and spatial modes. This scheme is based on linear optical elements, weak cross-Kerr ... We propose a scheme for generating a hyperentangled four-photon cluster state that is simultaneously entangled in polarization modes and spatial modes. This scheme is based on linear optical elements, weak cross-Kerr nonlinearity, and homodyne detection. Therefore, it is feasible with current experimental technology. 展开更多
关键词 hyperentangled cluster state cross-kerr nonlinearity homodyne detection controlled-Z gate
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Generation of Four-Photon Cluster State with Coherent Light via Cross-Kerr Nonlinearity
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作者 DU Qian-Hua YE Ming-Yong CHEN Zhi-Hua LI Xing-Hua LIN Xiu-Min 《Communications in Theoretical Physics》 SCIE CAS CSCD 2008年第9期623-626,共4页
We propose two schemes for preparing four-photon cluster state through cross-Kerr nonlinearity. Two coherent fields interact when they enter a nonlinear Kerr medium. If the interaction time is chosen appropriately in ... We propose two schemes for preparing four-photon cluster state through cross-Kerr nonlinearity. Two coherent fields interact when they enter a nonlinear Kerr medium. If the interaction time is chosen appropriately in each Kerr medium, four-photon cluster state can be generated based on the results of two homodyne detectors in the first scheme. These schemes only use Kerr medium and homodyne measurements on coherent light fields, which can be effciently made in quantum optical laboratories. In addition, weak cross-Kerr nonlinearity is sufficient. All of the properties make these schemes feasible in experiments. 展开更多
关键词 cluster state cross-kerr nonlinearity homodyne measurement
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Efficient three-step entanglement concentration for an arbitrary four-photon cluster state 被引量:1
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作者 司斌 苏石磊 +3 位作者 孙立莉 程留永 王洪福 张寿 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第3期137-142,共6页
We propose an entanglement concentration protocol to concentrate an arbitrary partially-entangled four-photon cluster state.As a pioneering three-step entanglement concentration scheme,our protocol only needs a single... We propose an entanglement concentration protocol to concentrate an arbitrary partially-entangled four-photon cluster state.As a pioneering three-step entanglement concentration scheme,our protocol only needs a single-photon resource to assist the concentration in each step,which makes this protocol more economical.With the help of the linear optical elements and weak cross-Kerr nonlinearity,one can obtain a maximally-entangled cluster state via local operations and classical communication.Moreover,the protocol can be iterated to obtain a higher success probability and is feasible under current experimental conditions. 展开更多
关键词 cluster state entanglement concentration cross-kerr nonlinearity
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基于两光子宇称门接近确定性的制备偏振Cluster态(英文) 被引量:1
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作者 赵春然 《光子学报》 EI CAS CSCD 北大核心 2013年第9期1057-1060,共4页
基于弱的交叉克尔效应和线性光学元件,利用光子偏振宇称门呈现了一个关于制备Cluster态的方案.本方案引入了交叉克尔非线性介质,采用了对相干探测模的非破坏测量,有效实现了光子与光子间的相互作用,进而获得所期望的光子纠缠态,同时可... 基于弱的交叉克尔效应和线性光学元件,利用光子偏振宇称门呈现了一个关于制备Cluster态的方案.本方案引入了交叉克尔非线性介质,采用了对相干探测模的非破坏测量,有效实现了光子与光子间的相互作用,进而获得所期望的光子纠缠态,同时可以提高制备的成功概率和制备态的保真度.通过本方案可以制备接近完美保真度的四光子偏振Cluster态,并具有接近1的成功概率.在本方案的基础上通过利用线性光学元件还可以获得3N+1个光子的偏振Cluster态. 展开更多
关键词 交叉克尔非线性 量子非破坏测量 cluster
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利用交叉克尔效应制备六光子纠缠态(英文)
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作者 朱孟正 赵春然 《光子学报》 EI CAS CSCD 北大核心 2011年第10期1469-1473,共5页
利用弱非线性的交叉克尔介质和对强相干探测场的动量积分零拍探测,呈现了一个关于制备六光子最大纠缠态的方案,如实现制备Dicke态和W态.在本方案中,只要相干探测光场的强度足够大时,对交叉克尔介质的非线性强度要求可以较弱,因而当前实... 利用弱非线性的交叉克尔介质和对强相干探测场的动量积分零拍探测,呈现了一个关于制备六光子最大纠缠态的方案,如实现制备Dicke态和W态.在本方案中,只要相干探测光场的强度足够大时,对交叉克尔介质的非线性强度要求可以较弱,因而当前实验技术条件上均能满足本方案的要求.考虑到目前实验上实现单光子很是相对困难的,在信号模上仅用弱的相干光替代单光子源,从而进一步增强了本方案的实验可行性. 展开更多
关键词 交叉克尔非线性 零拍探测 纠缠态
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利用交叉克尔非线性产生四光子偏振态簇态
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作者 赖柏辉 杜刚 +2 位作者 於亚飞 张智明 刘颂豪 《物理学报》 SCIE EI CAS CSCD 北大核心 2010年第2期1017-1020,共4页
提出了一种基于交叉克尔非线性效应产生四光子偏振态簇态的方案,与其他产生四光子簇态的方案比较,该方案引入宇称门的思想和用到基于零差探测的非破坏测量方法,使得该方案在实验上更易于操作及实现.
关键词 交叉克尔非线性 簇态 零差探测
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