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arXiv 2311.02419quant-ph
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利用量子行走确定性生成混合纠缠态

Deterministic generation of hybrid entangled states using quantum walks

Jaskaran Singh, Vikash Mittal, Soumyakanti Bose

AI总结:

本文提出利用一维分裂步量子行走在20个时间步内以99.9%保真度确定性生成量子比特与相干态之间的混合纠缠态,显著优于此前概率性方法,并具备实验可行性。

摘要:

近年来,量子比特与相干态之间的混合纠缠(HE)在多种量子信息处理任务中展现出优越性能,尤其是在量子密钥分发中。尽管其在理论上具有优势,但在实验室中高效生成此类态一直是一项挑战。在此,我们提出一种利用量子行走确定性且高效地生成混合纠缠态的方法。我们的方法在一维分裂步量子行走中仅用20个时间步即可实现高达99.9%的保真度。这相较于先前以低至80%保真度概率性生成混合纠缠态的方法,是一项显著改进。我们的方案不仅为混合纠缠态的生成提供了稳健的解决方案,还突显了量子行走的独特优势,从而推动了这一新兴领域的发展。此外,我们的方案在当前技术条件下具备实验可行性。

英文摘要:

In recent times, hybrid-entanglement (HE) between a qubit and a coherent state has demonstrated superior performance in various quantum information processing tasks, particularly in quantum key distribution. Despite its theoretical advantages, efficient generation of such states in the laboratory has been a challenge. Here, we introduce a deterministic and efficient approach for generating HE states using quantum walks. Our method achieves a remarkable fidelity of $99.9\%$ with just $20$ time steps in a one-dimensional split-step quantum walk. This represents a significant improvement over prior approaches for probabilistic generation of HE states with fidelity as low as $80\%$. Our scheme not only provides a robust solution to the generation of HE states but also highlights a unique advantage of quantum walks, thereby contributing to the advancement of this burgeoning field. Moreover, our scheme is experimentally feasible with the current technology.

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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