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

被引：165

作者：

Bao, Xiao-Hui ^{[1
,2
,3
]}

Qian, Yong ^{[1
,3
]}

Yang, Jian ^{[1
,3
]}

Zhang, Han ^{[1
,3
]}

Chen, Zeng-Bing ^{[1
,3
]}

Yang, Tao ^{[1
,3
]}

Pan, Jian-Wei ^{[1
,2
,3
]}

机构：

[1] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[2] Univ Heidelberg, Inst Phys, D-69120 Heidelberg, Germany

[3] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 19期

关键词：

D O I：

10.1103/PhysRevLett.101.190501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：4

共 24 条

[1] An introduction to Pound-Drever-Hall laser frequency stabilization [J].