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arXiv quant-ph/0307105quant-ph
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利用量子点单光子源实现量子隐形传态

Quantum teleportation with a quantum dot single photon source

David Fattal, Eleni Diamanti, Kyo Inoue, Yoshihisa Yamamoto

摘要:

报道了利用半导体单光子源实现量子隐形传态的实验研究。两个量子比特,一个目标和一个辅助,每个定义由一个光子占据两个光学模式(双轨量子比特),由单光子源独立产生。在测量来自不同量子位的两种模式并进行后选择时,发现剩余两种模式的状态再现了目标量子位的状态。特别地,目标量子比特模式之间的相干性在很大程度上被转移到输出模式。观测到的保真度为80%,这一数字可以通过来自源的连续光子之间的剩余可分辨性来定量解释。这种隐形传态方案的一个改进版本使用了更多的辅助器,是最近KLM提出的高效线性光学量子计算\cite{ref:klm}的基石。

英文摘要:

We report the experimental demonstration of a quantum teleportation protocol with a semiconductor single photon source. Two qubits, a target and an ancilla, each defined by a single photon occupying two optical modes (dual-rail qubit), were generated independently by the single photon source. Upon measurement of two modes from different qubits and postselection, the state of the two remaining modes was found to reproduce the state of the target qubit. In particular, the coherence between the target qubit modes was transferred to the output modes to a large extent. The observed fidelity is 80 %, a figure which can be explained quantitatively by the residual distinguishability between consecutive photons from the source. An improved version of this teleportation scheme using more ancillas is the building block of the recent KLM proposal for efficient linear-optics quantum computation \cite{ref:klm}.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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