共查询到17条相似文献,搜索用时 109 毫秒
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提出了隐形传送体系的总量子态实质是Bell基矢与变换算符的线性叠加,若变换算符可逆,则进行相应的逆变换操作即可实现量子态的隐形传送;若变换算符不可逆,则不能实现量子态的隐形传送;并且发现,变换算符的行列式与粒子的纠缠度有直接关系. 相似文献
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由波函数的叠加原理与变换算符出发,以三对任意纠缠的粒子作为量子通道对一个任意的三粒子态实现隐形传送为例,将体系的总量子态按Bell基展开,理论上接受者只需直接对自己拥有的粒子进行相应的变换,可使这三粒子恢复原始量子态,从而实现任意量子态的隐形传送.给出了变换算符与实际操作算符的联系.进一步可得出变换算符可逆是成功实现量子隐形传送的必要条件.
关键词:
Bell基展开
隐形传送
变换算符 相似文献
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N粒子量子态的隐形传送的理论分析 总被引:2,自引:0,他引:2
在量子态的隐形传送中,如果要对一个任意N粒子态实现隐形传送,发送者Alice 和接受者Bob 之间须建立一个非局域的2N个纠缠粒子作为量子通道,发送者对需传送的N粒子量子态与属于自己的纠缠对中的粒子分别进行N次Bell基测量,则将有2~(2N)个塌陷态,即有2~(2N)个变换算符,本文推导出变换算符的计算公式,并给出这2~(2N)个变换算符之间的关系,从而使接受者对自己拥有的粒子进行相应的变换大为简便,进一步由变换算符性质分析量子隐形传送的必要条件及成功几率. 相似文献
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三粒子任意态的量子隐形完全传送 总被引:7,自引:5,他引:2
提出一个利用六粒子非贝尔对量子通道对一个任意的三粒子量子态进行隐形传送的方案.发送者Alice对需传送的三粒子量子态与属于自己的纠缠对中的三粒子进行三次Bell基测量,并将测量结果通过经典通道告诉接受者,接受者Bob根据这些信息对自己拥有的粒子进行Toffoli变换,就可使这三粒子处于待发送的原始量子态,从而实现概率为1的量子态隐形传送.利用变换算符的思想,很容易得出塌陷态的表达式以及接受者Bob所做的幺正变换的表达式. 相似文献
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三体纯态的纠缠度与量子控制隐形传送的理论分析 总被引:1,自引:0,他引:1
对三体纯态,V.Coffman等提出了分布纠缠的概念及纠缠的度量"tangle".本文由变换算符出发,以三粒子作为量子通道对一个任意的粒子态实现控制隐形传送为例,给出纠缠度与量子控制隐形传态之间满足的关系. 相似文献
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HAO Xiang ZHU Shi-Qun 《理论物理通讯》2005,44(2):353-355
The canonical quantum teleportation of two-particle arbitrary state is realized by means of phase operator and number operator. The maximally entangled eigenstates between the difference of phase operators and the sum of number operators are considered as the quantum channels. In contrast to the standard quantum teleportation, the different unitary local operation of canonical teleportation can be simplified by a general expression. 相似文献
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HAO Xiang ZHU Shi-Qun 《理论物理通讯》2005,44(8)
The canonical quantum teleportation of two-particle arbitrary state is realized by means of phase operator and number operator. The maximally entangled eigenstates between the difference of phase operators and the sum of number operators are considered as the quantum channels. In contrast to the standard quantum teleportation, the different unitary local operation of canonical teleportation can be simplified by a general expression. 相似文献
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ZHA Xin-Wei 《理论物理通讯》2008,50(3):637-639
Recently Jiang et al. [Chin. Phys. Lett. 24 (2007) 1144] gave a scheme for probabilistic controlled teleportation of a triplet W
state from the sender Alice to the distant receiver Bob. The $m$ controlled
qubits are shared by m(s1,s2,…, sm) spatially-separated
supervisors. Based on transformation operator, we can extend to
teleporting an arbitrary three-qubit state. The relation between the
transformation operators and the Bob's unitary transformation is also
obtained. 相似文献
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Kai-Min Zheng Shi-You Liu Hao-Liang Zhang Cun-Jin Liu Li-Yun Hu 《Frontiers of Physics》2014,9(4):451-459
Using the technique of integration within an ordered product of operators we construct a generalized two-mode entangled state, which can be generated by an asymmetrical beam splitter (BS). Some important properties of this state, such as orthogonality and Schmidt decomposition, are also dis- cussed by deriving the expression of BS operator in coordinate representation. As its applications, to conjugate state, obtain operator identities, generate new squeezing operators (squeezed state) are also presented. It is shown that the fidelity of quantum teleportation can be enhanced under certain case by using the asymmetrical new squeezed state as entangled resource. 相似文献
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The generalized continuous variable two-mode entangled state |ς> is proposed by using the technique of integration within
an ordered product (IWOP) of operators. The characteristics of this new entangled representation and its application in quantum
teleportation are analyzed in detail. These results indicate that such real parameters |ς> indeed make up a new entangled
representation owing to its completeness and orthogonal relation. By employing the |ς> as quantum transmission channel, the
teleportation of any single-mode quantum state 3 |ψ>3 can be realized by a unitary transformation. 相似文献
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Probabilistic teleportation of an unknown N-atom state using a two-atom nonmaximally entangled state in cavity QED 总被引:1,自引:0,他引:1
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We present a scheme for realizing probabilistic teleportation of an unknown N-atom state via cavity QED. This scheme requires only a nonmaximally entangled pair to be used as a quantum channel, so the requirement of entanglement is reduced. In addition, our scheme does not involve the Bell-state measurement and is insensitive to the cavity decay, which is important from the experimental point of view. If the quantum channel is a two-atom maximally entangled state, teleportation of an unknown N-atom state can be realized by a simpler scheme via cavity QED. 相似文献