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arXiv quant-ph/9908081quant-ph
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非最大纠缠态的产生、表征和应用

Non-maximally entangled states: production, characterization and utilization

Andrew G. White, Daniel F. V. James, Philippe H. Eberhard, Paul G. Kwiat

摘要:

使用自发下转换光子源,我们产生真正的非最大纠缠态,即,而不需要后选择。纠缠的程度和相位是容易调谐的,其特征在于使用符合最小值的标准分析,并通过双光子态的量子态层析成像。使用后者,我们实验重建约化密度矩阵的偏振。最后,我们使用这些状态来测量Hardy分数,得到的结果是$122 σ$从任何本地现实的结果。

英文摘要:

Using a spontaneous-downconversion photon source, we produce true non-maximally entangled states, i.e., without the need for post-selection. The degree and phase of entanglement are readily tunable, and are characterized both by a standard analysis using coincidence minima, and by quantum state tomography of the two-photon state. Using the latter, we experimentally reconstruct the reduced density matrix for the polarization. Finally, we use these states to measure the Hardy fraction, obtaining a result that is $122 σ$ from any local-realistic result.

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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