Remote preparation of arbitrary two- and three-qubit states

Remote preparation of arbitrary two- and three-qubit states
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任意二量子位和三量子位状态的远程准备

DOI:
10.1209/0295-5075/87/30006
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发表时间:
2009-08
期刊:
EPL
影响因子:
1.8
通讯作者:
Feng, Xun-Li
Feng, Xun-Li
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Oh, C. H.;Liu, Jin-Ming;Feng, Xun-Li

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提出了一种利用二部部分纠缠态作为量子通道远程制备任意二量子位纯态的方案,并将该方案推广到任意三量子位的情况。针对两种远程状态准备情况,我们在发送方构建了两种不同的高效投影测量库,并计算了相应的成功概率。结果表明,双量子位或三量子位态的远程制备可以以统一保真度概率实现。此外,对于一些特殊的初始态集成,我们发现制备成功概率可以增加到2量子位态的4倍和3量子位态的8倍,并且在最大纠缠资源的情况下等于1。
We present a scheme for remotely preparing an arbitrary two-qubit pure state by using two bipartite partially entangled states as the quantum channel, the scheme is then generalized to the arbitrary three-qubit case. For the two cases of remote state preparation, we construct two different efficient projective measurement bases at sender's side and calculate the corresponding success probabilities. It is shown that remote preparation of the two-qubit or three-qubit state can be probabilistically achieved with unity fidelity. Moreover, for some special ensembles of the initial states, we find that the success probability of preparation can be increased to four times for two-qubit states and eight times for three-qubit states, and is equal to one in the case of the maximal entanglement resources.
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