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

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

(30 Jun 2008)

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Abstract

We report the first experimental realization of a narrow-band polarization-entangled photon source at MHz level through cavity-enhanced spontaneous parametric down-conversion. The measured linewidth is 9.6 MHz, which is comparable to the typical linewidth of atomic ensemble based quantum memories. Single-mode output is realized by introducing a reasonable cavity length difference between different polarizations and the use of temperature controlled etalons. We make a direct measurement of the coherence length through two-photon Hong-Ou-Mandel interference, with a result of 32 m. The entangled property is characterized with quantum state tomography, given a fidelity of 94% between our state and the maximal entangled state $|φ^->$.

@misc{citeulike:2966395, abstract = {We report the first experimental realization of a narrow-band polarization-entangled photon source at MHz level through cavity-enhanced spontaneous parametric down-conversion. The measured linewidth is 9.6 MHz, which is comparable to the typical linewidth of atomic ensemble based quantum memories. Single-mode output is realized by introducing a reasonable cavity length difference between different polarizations and the use of temperature controlled etalons. We make a direct measurement of the coherence length through two-photon Hong-Ou-Mandel interference, with a result of 32 m. The entangled property is characterized with quantum state tomography, given a fidelity of 94\% between our state and the maximal entangled state \$|\phi^-\>\$.}, author = {Bao, Xiao-Hui and Qian, Yong and Yang, Jian and Zhang, Han and Chen, Zeng-Bing and Yang, Tao and Pan, Jian-Wei }, citeulike-article-id = {2966395}, eprint = {0806.4788}, keywords = {experiment, source}, month = {Jun}, posted-at = {2008-07-05 16:55:09}, priority = {5}, title = {Generation of Narrow-Band Polarization-Entangled Photon Pairs for Atomic Quantum Memories}, url = {http://arxiv.org/abs/0806.4788}, year = {2008} }

RIS record

TY - ELEC ID - citeulike:2966395 L3 - citeulike-article-id:2966395 TI - Generation of Narrow-Band Polarization-Entangled Photon Pairs for Atomic Quantum Memories N2 - We report the first experimental realization of a narrow-band polarization-entangled photon source at MHz level through cavity-enhanced spontaneous parametric down-conversion. The measured linewidth is 9.6 MHz, which is comparable to the typical linewidth of atomic ensemble based quantum memories. Single-mode output is realized by introducing a reasonable cavity length difference between different polarizations and the use of temperature controlled etalons. We make a direct measurement of the coherence length through two-photon Hong-Ou-Mandel interference, with a result of 32 m. The entangled property is characterized with quantum state tomography, given a fidelity of 94% between our state and the maximal entangled state $|\phi^->$. KW - experiment KW - source AU - Bao, Xiao-Hui AU - Qian, Yong AU - Yang, Jian AU - Zhang, Han AU - Chen, Zeng-Bing AU - Yang, Tao AU - Pan, Jian-Wei PY - 2008/Jun/30/ UR - http://arxiv.org/abs/0806.4788 ER -

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