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Open Quantum Systems Decoherence Photonic Quantum Computing

Long lifetime and high-fidelity quantum memory of photonic polarization qubit by lifting Zeeman degeneracy

arXiv
Authors: Zhongxiao Xu, Yuelong Wu, Long Tian, Lirong Chen, Zhiying Zhang, Zhihui Yan, Shujing Li, Hai Wang, Changde Xie, Kunchi Peng

Year

2013

Paper ID

8493

Status

Preprint

Abstract Read

~2 min

Abstract Words

77

Citations

N/A

Abstract

Long-lived and high-fidelity memory for photonic polarization qubit (PPQ) is crucial for constructing quantum networks. Here we present an EIT-based millisecond storage system in which a moderate magnetic field is applied on a cold-atom cloud to lift Zeeman degeneracy. PPQ states are stored as two magnetic-field-insensitive spin waves. Especially, the influence of magnetic-field-sensitive spin waves on the storage performances is almost totally avoided. The measured average fidelities of polarization states are 98.6% at 200 us and 78.4% at 4.5 ms, respectively.

Why This Paper Matters

  • This paper contributes to the Photonic Quantum Computing research area in the Quantum Articles archive.
  • It adds a 2013 reference point for readers tracking recent quantum research.
  • Long-lived and high-fidelity memory for photonic polarization qubit (PPQ) is crucial for constructing quantum networks.

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References & Citation Signals

[1] DOI https://doi.org/arXiv:1306.4262 [2] arXiv https://arxiv.org/abs/1306.4262 [3] Publisher https://arxiv.org/abs/1306.4262

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