On-demand storage of photonic qubits at telecom wavelengths
- URL: http://arxiv.org/abs/2201.03692v2
- Date: Wed, 16 Nov 2022 08:29:56 GMT
- Title: On-demand storage of photonic qubits at telecom wavelengths
- Authors: Duan-Cheng Liu, Pei-Yun Li, Tian-Xiang Zhu, Liang Zheng, Jian-Yin
Huang, Zong-Quan Zhou, Chuan-Feng Li, Guang-Can Guo
- Abstract summary: Quantum memories at telecom wavelengths are crucial for the construction of large-scale quantum networks based on existing fiber networks.
Here we demonstrate the storage and on-demand retrieval of telecom photonic qubits using a laser-written waveguide fabricated in an $167$Er$3+$:Y$$$$_5$ crystal.
- Score: 11.019889191984891
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Quantum memories at telecom wavelengths are crucial for the construction of
large-scale quantum networks based on existing fiber networks. On-demand
storage of telecom photonic qubits is a fundamental request for such networking
applications but yet to be demonstrated. Here we demonstrate the storage and
on-demand retrieval of telecom photonic qubits using a laser-written waveguide
fabricated in an $^{167}$Er$^{3+}$:Y$_2$SiO$_5$ crystal. Both ends of the
waveguide memory are directly connected with fiber arrays with a fiber-to-fiber
efficiency of 51%. Storage fidelity of 98.3(1)% can be obtained for time-bin
qubits encoded with single-photon-level coherent pulses, which is far beyond
the maximal fidelity that can be achieved with a classical measure and prepare
strategy. This device features high reliability, easy scalability and can be
directly integrated into fiber networks, which could play an essential role in
fiber-based quantum networks.
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