Efficient quantum memory for single photon polarization qubits
- URL: http://arxiv.org/abs/2004.03123v1
- Date: Tue, 7 Apr 2020 04:39:54 GMT
- Title: Efficient quantum memory for single photon polarization qubits
- Authors: Y. Wang, J. Li, S. Zhang, K. Su, Y. Zhou, K. Liao, S. Du, H. Yan, and
S. L. Zhu
- Abstract summary: A quantum memory is a key interface for realizing long-distance quantum communication and large-scale quantum computation.
Here, we report the demonstration of a quantum memory for single-photon polarization qubits with an efficiency of >85% and a fidelity of >99 %.
For the single-channel quantum memory, the optimized efficiency for storing and retrieving single-photon temporal waveforms can be as high as 90.6 %.
- Score: 0.21670084965090575
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: A quantum memory, for storing and retrieving flying photonic quantum states,
is a key interface for realizing long-distance quantum communication and
large-scale quantum computation. While many experimental schemes of high
storage-retrieval efficiency have been performed with weak coherent light
pulses, all quantum memories for true single photons achieved so far have
efficiencies far below 50%, a threshold value for practical applications. Here,
we report the demonstration of a quantum memory for single-photon polarization
qubits with an efficiency of >85% and a fidelity of >99 %, basing on balanced
two-channel electromagnetically induced transparency in laser-cooled rubidium
atoms. For the single-channel quantum memory, the optimized efficiency for
storing and retrieving single-photon temporal waveforms can be as high as 90.6
%. Our result pushes the photonic quantum memory closer to its practical
applications in quantum information processing.
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