Efficient multiplexed quantum memory with high dimensional orbital angular momentum states in cold atoms
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arXiv
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912255917948928 |
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| author | Yang, Xin Wang, Chengyuan Wang, Jinwen Cao, Mingtao Chen, Yun Chang, Hong Dong, Ruifang Zhang, Shougang Wei, Dong Zhang, Pei Li, Fuli Gao, Hong |
| author_facet | Yang, Xin Wang, Chengyuan Wang, Jinwen Cao, Mingtao Chen, Yun Chang, Hong Dong, Ruifang Zhang, Shougang Wei, Dong Zhang, Pei Li, Fuli Gao, Hong |
| contents | Quantum memory plays a pivotal role in the construction of quantum repeaters, which are essential devices for establishing long-distance quantum communications and large-scale quantum networks. To boost information capacity and signal processing speed, the implementation of high-efficiency multiplexed quantum memories is essential for the development of multiplexed quantum repeaters. In this work, we experimentally demonstrate an efficient multiplexed quantum memory by consolidating photons carrying high-dimensional orbital angular momentum (OAM) state from 4 individual channels into an elongated cold $^{87}$Rb atomic ensemble. Benefiting from the cold atomic ensemble with high optical depth, we obtain a storage efficiency exceeding 70% for the 4-channel multiplexed beam. The storage fidelities surpass 83% when all channels are operated in a 4-dimensional Hilbert space, which is far above the classical benchmark and validates the quantum functionality of our memory system. The achieved high-efficiency OAM multiplexed quantum memory opens up an avenue for efficient quantum information processing over multiple parallel channels, promising significant advances in the field of quantum communication and networking. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_01106 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Efficient multiplexed quantum memory with high dimensional orbital angular momentum states in cold atoms Yang, Xin Wang, Chengyuan Wang, Jinwen Cao, Mingtao Chen, Yun Chang, Hong Dong, Ruifang Zhang, Shougang Wei, Dong Zhang, Pei Li, Fuli Gao, Hong Quantum Physics Quantum memory plays a pivotal role in the construction of quantum repeaters, which are essential devices for establishing long-distance quantum communications and large-scale quantum networks. To boost information capacity and signal processing speed, the implementation of high-efficiency multiplexed quantum memories is essential for the development of multiplexed quantum repeaters. In this work, we experimentally demonstrate an efficient multiplexed quantum memory by consolidating photons carrying high-dimensional orbital angular momentum (OAM) state from 4 individual channels into an elongated cold $^{87}$Rb atomic ensemble. Benefiting from the cold atomic ensemble with high optical depth, we obtain a storage efficiency exceeding 70% for the 4-channel multiplexed beam. The storage fidelities surpass 83% when all channels are operated in a 4-dimensional Hilbert space, which is far above the classical benchmark and validates the quantum functionality of our memory system. The achieved high-efficiency OAM multiplexed quantum memory opens up an avenue for efficient quantum information processing over multiple parallel channels, promising significant advances in the field of quantum communication and networking. |
| title | Efficient multiplexed quantum memory with high dimensional orbital angular momentum states in cold atoms |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2503.01106 |