Realization of the tradeoff between internal and external entanglement

报告题目： Realization of the tradeoff between internal and external entanglement

报告人：朱洁，中国科学技术大学量子信息重点实验室

报告时间：2019年11月2日下午3点

报告地点：物理科技楼201

报告邀请人：董裕力

报告摘要：We experimentally realize the internal and external entanglement tradeoff, which is a new kind of entanglement monogamy relation different from that usually discussed. Using a source of twin photons, we find that the external entanglement in polarization of twin photons, and the pathpolarization internal entanglement of one photon, limit each other. In the extreme case, when the internal state is maximally entangled, the external entanglement must be vanishing, that illustrate entanglement monogamy. Our results of the experiment coincide with the theoretical predictions, and therefore provide a direct experimental observation of the internal and external entanglement monogamy relation.