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arXiv · 2301.00999

Highly efficient storage of 25-dimensional photonic qudit in a cold-atom-based quantum memory

Ming-Xin Dong·Wei-Hang Zhang·Lei Zeng·Ying-Hao Ye·Da-Chuang Li·Guang-Can Guo·Dong-Sheng Ding·Bao-Sen Shi
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Abstract

Building an efficient quantum memory in high-dimensional Hilbert spaces is one of the fundamental requirements for establishing high-dimensional quantum repeaters, where it offers many advantages over two-dimensional quantum systems, such as a larger information capacity and enhanced noise resilience. To date, there have been no reports about how to achieve an efficient high-dimensional quantum memory. Here, we experimentally realize a quantum memory that is operational in Hilbert spaces of up to 25 dimensions with a storage efficiency of close to 60%. The proposed approach exploits the spatial-mode-independent interaction between atoms and photons which are encoded in transverse size-invariant orbital angular momentum modes. In particular, our memory features uniform storage efficiency and low cross-talk disturbance for 25 individual spatial modes of photons, thus allowing storing arbitrary qudit states programmed from 25 eigenstates within the high-dimensional Hilbert spaces, and eventually contributing to the storage of a 25-dimensional qudit state. These results would have great prospects for the implementation of long-distance high-dimensional quantum networks and quantum information processing.

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Ming-Xin Dong, Wei-Hang Zhang, Lei Zeng, Ying-Hao Ye, Da-Chuang Li, Guang-Can Guo, Dong-Sheng Ding, Bao-Sen Shi. 2023-01-03. Highly efficient storage of 25-dimensional photonic qudit in a cold-atom-based quantum memory. https://arxiv.org/abs/2301.00999

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