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arXiv 2006.02733quant-phcond-mat.mes-hall
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非理想量子点的量子隐形传态

Quantum Teleportation with Imperfect Quantum Dots

Francesco Basso Basset, Francesco Salusti, Lucas Schweickert, Michele B. Rota, Davide Tedeschi, Saimon F. Covre da Silva, Emanuele Roccia, Val Zwiller, Klaus D.… 展开作者

Francesco Basso Basset, Francesco Salusti, Lucas Schweickert, Michele B. Rota, Davide Tedeschi, Saimon F. Covre da Silva, Emanuele Roccia, Val Zwiller, Klaus D. Jöns, Armando Rastelli, Rinaldo Trotta

摘要:

高效的全光子量子隐形传态需要快速且确定性的高度不可分辨且纠缠的光子源。基于固态的量子发射器-特别是半导体量子点-是一个有希望的候选人。然而,尽管在纳米纤维方面取得了显着的进展,量子隐形传态的概念验证演示强调了发射器的不完美仍然是应用的主要障碍。在这里,而不是专注于源优化策略,我们处理的不完善之处,并研究不同的隐形传态协议的目标是确定一个最大的隐形传态保真度。利用一个具有低于标准值的纠缠和光子不变性的量子点,我们证明了平均隐形传态保真度可以从低于经典极限提高到0.842(14)。我们的研究结果得到了定量解释实验结果的理论模型的支持,放松了对理想纠缠光子源的非常严格的要求,并强调不完美的量子点仍然可以在基于远程传输的量子通信架构中有发言权。

英文摘要:

Efficient all-photonic quantum teleportation requires fast and deterministic sources of highly indistinguishable and entangled photons. Solid-state-based quantum emitters--notably semiconductor quantum dots--are a promising candidate for the role. However, despite the remarkable progress in nanofabrication, proof-of-concept demonstrations of quantum teleportation have highlighted that imperfections of the emitter still place a major roadblock in the way of applications. Here, rather than focusing on source optimization strategies, we deal with imperfections and study different teleportation protocols with the goal of identifying the one with maximal teleportation fidelity. Using a quantum dot with sub-par values of entanglement and photon indistinguishability, we show that the average teleportation fidelity can be raised from below the classical limit to 0.842(14). Our results, which are backed by a theoretical model that quantitatively explains the experimental findings, loosen the very stringent requirements set on the ideal entangled-photon source and highlight that imperfect quantum dots can still have a say in teleportation-based quantum communication architectures.

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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