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arXiv 1408.0940quant-ph
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量子测量的最佳纠缠辅助鉴别

Optimal entanglement-assisted discrimination of quantum measurements

M. Mikova, M. Sedlak, I. Straka, M. Micuda, M. Ziman, M. Jezek, M. Dusek, J. Fiurasek

摘要:

我们研究了两个投影单量子比特测量之间的最佳区分的情况下,测量只能进行一次。我们认为一般设置涉及一个可调的分数的不确定的结果,我们证明了最佳的歧视策略需要一个纠缠的探测状态的任何非零率的不确定的结果。我们实验上实现了这种最佳的歧视策略的投影测量的偏振态的单光子。我们的设置包括一个实时的电光前馈回路,使我们能够充分利用纠缠的好处,在歧视的量子测量。实验数据清楚地表明了基于纠缠的鉴别策略与非纠缠单量子比特探针相比的优势。

英文摘要:

We investigate optimal discrimination between two projective single-qubit measurements in a scenario where the measurement can be performed only once. We consider general setting involving a tunable fraction of inconclusive outcomes and we prove that the optimal discrimination strategy requires an entangled probe state for any nonzero rate of inconclusive outcomes. We experimentally implement this optimal discrimination strategy for projective measurements on polarization states of single photons. Our setup involves a real-time electrooptical feed-forward loop which allows us to fully harness the benefits of entanglement in discrimination of quantum measurements. The experimental data clearly demonstrate the advantage of entanglement-based discrimination strategy as compared to unentangled single-qubit probes.

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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