Generation of Narrow-Band Polarization-Entangled Photon Pairs for Atomic Quantum Memories

Xiao-Hui Bao; Yong Qian; Jian Yang; Han Zhang; Zeng-Bing Chen; Tao Yang; Jian-Wei Pan

doi:10.1103/PhysRevLett.101.190501

Generation of Narrow-Band Polarization-Entangled Photon Pairs for Atomic Quantum Memories

Quantum Physics 2016-11-10 v2

Authors: Xiao-Hui Bao , Yong Qian , Jian Yang , Han Zhang , Zeng-Bing Chen , Tao Yang , Jian-Wei Pan

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Abstract

We report an experimental realization of a narrow-band polarization-entangled photon source with a linewidth of 9.6 MHz through cavity-enhanced spontaneous parametric down-conversion. This linewidth is comparable to the typical linewidth of atomic ensemble based quantum memories. Single-mode output is realized by setting a reasonable cavity length difference between different polarizations, using of temperature controlled etalons and actively stabilizing the cavity. The entangled property is characterized with quantum state tomography, giving a fidelity of 94% between our state and a maximally entangled state. The coherence length is directly measured to be 32 m through two-photon interference.

Keywords

polarization-entangled photon pairs cavity-enhanced spontaneous parametric down-conversion atomic quantum memories quantum state tomography two-photon interference narrow-band source

Cite

@article{arxiv.0806.4788,
  title  = {Generation of Narrow-Band Polarization-Entangled Photon Pairs for Atomic Quantum Memories},
  author = {Xiao-Hui Bao and Yong Qian and Jian Yang and Han Zhang and Zeng-Bing Chen and Tao Yang and Jian-Wei Pan},
  journal= {arXiv preprint arXiv:0806.4788},
  year   = {2016}
}

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4 pages, 4 figures

Generation of Narrow-Band Polarization-Entangled Photon Pairs for Atomic Quantum Memories

Abstract

Keywords

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