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arXiv 2409.19985quant-ph
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通过上行链路卫星信道进行量子纠缠分发

Quantum Entanglement Distribution via Uplink Satellite Channels

S. Srikara, Hudson Leone, Alexander S. Solnstev, Simon J. Devitt

AI总结:

本文通过数值分析信道效率与保真度,证明了在卫星上进行离散变量光子Bell测量的可行性,为大规模星地上行链路量子纠缠分发提供了依据。

摘要:

在开发量子卫星方面已取得重大进展,这些卫星在太空中生成纠缠对,并将其分发给相距一定距离的地面站。反向的上行链路情况,即在地面生成纠缠对并利用光学Bell测量在卫星上进行交换,由于普遍认为其在实际中不可行,尚未被认真考虑。在本文中,我们通过进行详细的数值分析,估计了各种卫星-地面站配置的信道效率和可达到的纠缠对保真度,阐明了在太空中执行离散变量光子Bell测量的可行性。我们的模型考虑了广泛的物理效应,如大气效应、杂散光子和模式失配。我们的研究结果展示了太空光子Bell测量可行性的良好前景,这推动了未来关于大规模基于卫星的上行链路纠缠分发的研究。

英文摘要:

Significant work has been done to develop quantum satellites, which generate entangled pairs in space and distribute them to ground stations separated some distance away. The reverse uplink case, where pairs are generated on the ground and swapped on the satellite using an optical Bell-measurement, has not been seriously considered due to a prevailing assumption that it is practically infeasible. In this letter, we illustrate the feasibility of performing Discrete Variable photonic Bell-measurements in space by conducting a detailed numerical analysis to estimate the channel efficiency and attainable pair fidelity for various satellite-station configurations. Our model accounts for a wide range of physical effects such as atmospheric effects, stray photons, and mode mismatch. Our findings show promise toward the feasibility of photonic Bell-measurements in space, which motivates future research towards large-scale Satellite-based uplink entanglement distribution.

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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