高维飞行结构光子的集成制备与操纵

IF 27.2 Q1 OPTICS
eLight Pub Date : 2024-06-29 DOI:10.1186/s43593-024-00066-6
Haoqi Zhao, Yichi Zhang, Zihe Gao, Jieun Yim, Shuang Wu, Natalia M. Litchinitser, Li Ge, Liang Feng
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引用次数: 0

摘要

未来全球量子互联网能够提供稳健、高容量的量子信息传输,其希望主要寄托在高维叠加态制备的基本量子信息载体--量子点(qudits)上。然而,制备和操纵 N 维飞行量子比特以及随后建立它们之间的纠缠仍然是极具挑战性的任务,需要在多个自由度上同时精确操纵 2 (N-1) 个参数。在这里,我们采用一种集成方法,探索光的两个自由度--空间模式和偏振--的协同作用,在四维希尔伯特空间中以高量子保真度生成、编码和操纵飞行结构光子及其形成的量子比特,从本质上增强抗噪声能力和提高量子数据速率。我们的量子比特的四种特征自旋轨道模式在强度分布和群速度方面具有相同的时空特性,从而在整个量子数据传输链路中保持了长程一致性。双光子纠缠在集成操纵过程中得到了很好的保留,我们明智地利用了双光子纠缠,在广维希尔伯特空间中提出了多功能自旋轨道簇态。这种簇态有望用于量子纠错,从而进一步增强远距离量子通信的信道鲁棒性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Integrated preparation and manipulation of high-dimensional flying structured photons

Integrated preparation and manipulation of high-dimensional flying structured photons

The hope for a futuristic global quantum internet that provides robust and high-capacity quantum information transfer lies largely on qudits, the fundamental quantum information carriers prepared in high-dimensional superposition states. However, preparing and manipulating N-dimensional flying qudits as well as subsequently establishing their entanglement are still challenging tasks, which require precise and simultaneous maneuver of 2 (N-1) parameters across multiple degrees of freedom. Here, using an integrated approach, we explore the synergy from two degrees of freedom of light, spatial mode and polarization, to generate, encode, and manipulate flying structured photons and their formed qudits in a four-dimensional Hilbert space with high quantum fidelity, intrinsically enabling enhanced noise resilience and higher quantum data rates. The four eigen spin–orbit modes of our qudits possess identical spatial–temporal characteristics in terms of intensity distribution and group velocity, thereby preserving long-haul coherence within the entirety of the quantum data transmission link. Judiciously leveraging the bi-photon entanglement, which is well preserved in the integrated manipulation process, we present versatile spin–orbit cluster states in an extensive dimensional Hilbert space. Such cluster states hold the promise for quantum error correction which can further bolster the channel robustness in long-range quantum communication.

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CiteScore
30.40
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