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暖雪8521

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中国科学家首次实现量子态隐形传输  

2016-09-21 09:15:13|  分类: 战略观察 |  标签: |举报 |字号 订阅

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中国科学家首次实现量子态隐形传输 - 暖雪8521 - 暖雪8521

5月25日,在中科院量子信息与量子科技前沿卓越创新中心内的量子模拟实验室,工作人员正在调试超冷原子光晶格平台的激光伺服系统。该平台可以人工操纵冷原子的量子状态,从而模拟一些难以操纵的、复杂物理系统的机制

量子隐形传态是一种传递量子状态的重要通信方式,通俗地讲,就是将编码在光子中的量子信息从一个地点远程传输到另一个地点。日前,中国科学技术大学教授潘建伟、张强等与相关单位合作,在合肥量子城域通信试验网上首次实现了预先纠缠分发的独立量子源之间的量子态隐形传输。

中国科学家首次实现量子态隐形传输 - 暖雪8521 - 暖雪8521

2016年8月16日1时40分,我国在酒泉卫星发射中心用长征二号丁运载火箭成功将世界首颗量子科学实验卫星(简称“量子卫星”)发射升空。

该研究成果9月19日在线发表在英国《自然·光子学》上。同日刊发的还有加拿大研究团队的量子隐形传态实验成果。这两项独立研究表明,城际网络进行量子隐形传态在技术上是可行的,这为未来可扩展量子网络的构建奠定了坚实基础。

中国科学家首次实现量子态隐形传输 - 暖雪8521 - 暖雪8521

在酒泉卫星发射中心,量子科学实验卫星在与运载火箭适配器对接(2016年8月3日摄)。新华社

张强介绍,现有的量子保密通信主要通过量子密钥对经典信息进行加密传输,随着技术的发展,最终的量子保密通信将会实现量子信息的传输,通过光纤网络进行量子隐形传态有望极大提高互联网连接的安全性和强度。然而,利用光纤网络进行长距离量子隐形传态需要独立的光源,且在长距离传输后,两个光源的光束没有差别,成为量子隐形传态的技术挑战。

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