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Quantum Networks

Robust Ion-Photon Entanglement via Polarization-to-Time-Bin Conversion

arXiv
Authors: Ana Luiza Ferrari, Denton Wu, Mika A. Zalewski, Norbert M. Linke

Year

2026

Paper ID

72219

Status

Preprint

Abstract Read

~2 min

Abstract Words

106

Citations

N/A

Abstract

Time-bin photonic qubits are well-suited for quantum network applications due to their robustness to polarization instability in fiber links and potential for heterogeneous networks. In this work, we implement the first entanglement-preserving polarization-to-time-bin conversion of a photon qubit in an entangled state with a matter qubit. Photons initially generated with polarization encoding are converted to the time-bin basis through a polarization-discriminating asymmetric Mach-Zehnder interferometer. The photonic qubits are generated via the 1092 nm transition of a 88Sr+ ion. We measure state fidelity bounds of 0.906 pm 0.011 le mathcal{F} le 0.934pm 0.011, with conversion error < 0.028, and find this fidelity is unaffected by depolarizing noise even at full depolarization strength.

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  • Time-bin photonic qubits are well-suited for quantum network applications due to their robustness to polarization instability in fiber links and potential for heterogeneous...

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References & Citation Signals

[1] DOI https://doi.org/arXiv:2607.07805 [2] arXiv https://arxiv.org/abs/2607.07805 [3] Publisher https://arxiv.org/abs/2607.07805

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