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arXiv · 1806.10407

Broad Spiral-Bandwidth of Orbital Angular Momentum Interface between Photon and Memory

Dong-Sheng Ding·Ming-Xin Dong·Wei Zhang·Shuai Shi·Yi-Chen Yu·Ying-Hao Ye·Guang-Can Guo·Bao-Sen Shi
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Abstract

The complex interactions between orbital angular momentum (OAM) light and atoms are particularly intriguing in the areas of quantum optics and quantum information science. Building a versatile high-dimensional quantum network needs broad spiral-bandwidth for preparing higher-quanta OAM mode and resolving the bandwidth mismatch in spatial space and etc. Here, we experimentally demonstrate a broad spiral-bandwidth quantum interface between photon and memory. Through twisted fields of the writing and reading, the correlated OAM distribution between photon and memory is significantly broadened. This broad spiral-bandwidth quantum interface could be spanned in multiplexing regime and could work in high-quanta scenario with capability of |l|=30, and we demonstrate the entanglement within 2-D subspace with a fidelity of 80.5\text{\textpm}4.8\% for high l. Such state-of-the-art technology to freely control the spatial distribution of OAM memory is very helpful to construct high-dimensional quantum networks and provides a benchmark in the field of actively developing methods to engineer OAM single photon from matters.

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Dong-Sheng Ding, Ming-Xin Dong, Wei Zhang, Shuai Shi, Yi-Chen Yu, Ying-Hao Ye, Guang-Can Guo, Bao-Sen Shi. 2018-06-27. Broad Spiral-Bandwidth of Orbital Angular Momentum Interface between Photon and Memory. https://arxiv.org/abs/1806.10407

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