| 两种连续变量爱因斯坦波多尔斯基罗森关联测量方法的比较 |
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| 引用本文： | 荆杰泰,李小英,潘庆.两种连续变量爱因斯坦波多尔斯基罗森关联测量方法的比较[J].光学学报,2003,23(2):32-136. |
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| 作者姓名： | 荆杰泰 李小英 潘庆 |
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| 作者单位： | 山西大学光电研究所量子光学与光量子器件国家重点实验室,太原,030006 |
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| 摘 要： | 讨论了测量连续变量爱因斯坦－波多尔斯基－罗森（EPR）关联的两种实验方法，由于在平衡零拍探测和贝尔态直接测量中为标定关联度所选取的参考基准不同，造成谱仪显示的结果有所差异，但经过基准变换，所测得的耦合模压缩度，爱因斯坦－波多尔斯基－罗森关联度以及它们之间的换算关系均一致。从理论上分析了测量原理，并从实验角度讨论了两种方法的优缺点。
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| 关 键 词： | 连续变量 测量方法 量子信息 爱因斯坦－波多尔斯基－罗森关联度 贝尔态直接测量 平衡零拍探测 量子力学 耦合模压缩变 |
| 收稿时间： | 2001/10/15 |
Comparison between Two Methods Measuring of Einstein-Podolsky-Rosen Correlation for Continuous Variables |
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| Jing Jietai,Li Xiaoying,Pan Qing.Comparison between Two Methods Measuring of Einstein-Podolsky-Rosen Correlation for Continuous Variables[J].Acta Optica Sinica,2003,23(2):32-136. |
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| Authors: | Jing Jietai Li Xiaoying Pan Qing |
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| Abstract: | The two methods measuring Einstein-Podolsky-Rosen (EPR) correlation of continuous variables, the balanced homodyne detection and the direct measurement for Bell-state are analytically discussed. In the two detection systems the designated reference levels for the quantum correlation measurement are different, so the displayed results on the spectral analyzer are not identical. After implementing a transformation to the reference level the measured squeezing of coupled mode, EPR correlation and the relation expression between them are totally same. The measurement principle of the two methods is theoretically analyzed and their characteristics are discussed from the requirements of experiments. |
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| Keywords: | quantum information EPR beam pairs Bell-state direct measurement balanced homodyne detection |
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