原子与分子物理学报Issue(3)：442-446,5.DOI:10.3969/j.issn.1000-0364.2015.03.016
泵浦光强度对纠缠光子品质的影响
Effect of pump intensity on the quality of entangled photons
摘要
Abstract
The brightness and quality directly determine the application value of entangled photons as resource of quantum information processing.In parametric conversion process, study on the relation between pump laser in-tensity and the produce efficiency and quality of entangled photons has basic significance to the preparation of high quality entanglement source.Using spontaneous parametric down conversion, the polarization post selection and the technique of coincidence counting, the polarization Einstein-Podolsky-Rosen ( EPR) entangled states have been prepared.The effects of the pump laser intensity on the efficiency, contrast and fidelity of the entan-gled photons have been studied systematically.The results show that with the increase of the pump laser intensi-ty, the generation efficiency of entangled photons is almost invariable, namely the entanglement source brightness increases linearly with the laser intensity.On the other hand, the contrast and fidelity of the entangled photons decrease with the increment of laser power.关键词
量子纠缠/参量下转换/效率/保真度Key words
Quantum entanglement/Parametric down conversion/Efficiency/Fidelity分类
数理科学引用本文复制引用
赵加强,曹连振,逯怀新..泵浦光强度对纠缠光子品质的影响[J].原子与分子物理学报,2015,(3):442-446,5.基金项目
国家自然科学基金（11174224）；山东省自然科学基金（ ZR2011AL012， ZR2013FM001）；山东省科技发展计划（2011YD01049）；山东省大型科学仪器设备升级改造技术研究项目（2013SJGZ10）；山东省高等学校科技计划 （）
