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Asia Communications and Photonics Conference

Quantum Teleportation from Photon to Matter at Telecom Band

Jinyu Liao, Si Qing Shen, Hao Li, Zhen Wang, You Wang, Guangwei Deng, Hai‐Zhi Song, Lixing You, Yunru Fan, Guang‐Can Guo, Qiang Zhou

Published Nov 4, 2023• 0 citations
Publisher

Abstract

We experimentally demonstrate quantum teleportation from a telecom photonic time-bin qubit to a solid-state quantum memory at telecom band. The demonstration is compatible with fiber communication infrastructure, which is important for future quantum networks.
DOI
10.1109/acp/poem59049.2023.10369944

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A key enabling feature of future quantum networks is interoperability between platforms that operate at different wavelengths and with different qubit encodings. We demonstrate an interface that converts atom-photon entanglement from polarization encoding at an atomic wavelength to time-bin encoding in the telecom C-band. Atom-entangled photons at 854 nm are generated from a single 40^{40}40Ca+^++ ion. After quantum frequency conversion to 1550 nm, the photonic polarization qubit is converted into a time-bin qubit using a fiber-based Mach--Zehnder-like encoder. Full quantum tomography of the final state verifies that the process preserves entanglement with 96.3(4.2)% fidelity. Together with the independent work of Ferrari et al. [arXiv:2607.07805 (2026)], this is the first demonstration of polarization-to-time-bin conversion of photons entangled with a single atomic quantum memory. The telecom-compatible interface enables robust qubit transmission over optical fibers and provides a key building block for heterogeneous quantum networking architectures.
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