Chinese scholars have successfully developed "read on demand" integrated solid state quantum memory
1-2 minutes
updated 1 hour ago (GMT+8)
Recently, Guo guangcan's team of academicians of University of science and technology of China has made important progress in this field. Li Chuanfeng and Zhou Zongquan's research groups in the team have developed an "on-demand read" integrated solid-state quantum memory for the first time. Quantum memory is the core device to construct large-scale quantum network. Li Chuanfeng and Zhou Zongquan have been working on solid-state quantum memory for a long time. In recent years, they have developed laser direct writing technology to prepare integrable quantum memory on rare earth doped crystals. Using femtosecond laser and other technologies, the research group has developed an on-demand read-out integrated solid-state quantum memory for the first time. The storage fidelity reaches 99.3% ± 0.2%, indicating that it has high reliability. The results are of great significance for the realization of large capacity quantum storage and the construction of quantum network.
202101/02 09:38:25
来源：新华网
我国学者成功研制“按需式读取”的可集成固态量子存储器
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新华社合肥1月1日电（记者徐海涛）信息的存储与读出时间对构建量子网络非常重要。近期，中国科学技术大学郭光灿院士团队在该领域取得重要进展，团队中的李传锋、周宗权研究组首次研制出“按需式读取”的可集成固态量子存储器。
量子存储器是构建大尺度量子网络的核心器件。而按需式读取，是指光子写入存储器以后再根据需求决定读出的时间，这对实现量子网络中的同步操作等功能至关重要。但目前国际上已有的可集成固态量子存储器均基于简单的原子频率梳方案，读出时间在光子写入之前预先设定，无法按需读取。
李传锋、周宗权研究组长期致力于固态量子存储器研究，近年来发展了激光直写技术，在稀土掺杂晶体上制备可集成量子存储器。近期，为实现按需式读取，他们采用了一种改进的量子存储方案，即电场调制的原子频率梳方案，通过引入两个电脉冲可实时操控稀土离子的演化，从而控制存储器的读出时间。
使用飞秒激光等技术，研究组首次研制出按需式读取的可集成固态量子存储器，存储保真度达到99.3%±0.2%，表明其具有极高的可靠性。
该成果对实现大容量量子存储和构建量子网络都有重要意义。国际知名学术期刊《物理评论快报》日前发表了该成果。
and..
China Telecom launches the first quantum secure communication product
1 minute
yesterday 04:59 PM (GMT+8)
Recently, China Telecom officially announced that it has launched the industry's first quantum secure communication product "quantum secret phone", which is developed by China Telecom Quantum Technology Co., Ltd., which is controlled by China Telecom. It has high-level security and is implemented in the form of app. It has been applied to a variety of Android models and has been successfully put into commercial trial in Anhui. (interface News)
1-2 minutes
updated 1 hour ago (GMT+8)
Recently, Guo guangcan's team of academicians of University of science and technology of China has made important progress in this field. Li Chuanfeng and Zhou Zongquan's research groups in the team have developed an "on-demand read" integrated solid-state quantum memory for the first time. Quantum memory is the core device to construct large-scale quantum network. Li Chuanfeng and Zhou Zongquan have been working on solid-state quantum memory for a long time. In recent years, they have developed laser direct writing technology to prepare integrable quantum memory on rare earth doped crystals. Using femtosecond laser and other technologies, the research group has developed an on-demand read-out integrated solid-state quantum memory for the first time. The storage fidelity reaches 99.3% ± 0.2%, indicating that it has high reliability. The results are of great significance for the realization of large capacity quantum storage and the construction of quantum network.
202101/02 09:38:25
来源：新华网
我国学者成功研制“按需式读取”的可集成固态量子存储器
字体： 小 中 大
分享到：
新华社合肥1月1日电（记者徐海涛）信息的存储与读出时间对构建量子网络非常重要。近期，中国科学技术大学郭光灿院士团队在该领域取得重要进展，团队中的李传锋、周宗权研究组首次研制出“按需式读取”的可集成固态量子存储器。
量子存储器是构建大尺度量子网络的核心器件。而按需式读取，是指光子写入存储器以后再根据需求决定读出的时间，这对实现量子网络中的同步操作等功能至关重要。但目前国际上已有的可集成固态量子存储器均基于简单的原子频率梳方案，读出时间在光子写入之前预先设定，无法按需读取。
李传锋、周宗权研究组长期致力于固态量子存储器研究，近年来发展了激光直写技术，在稀土掺杂晶体上制备可集成量子存储器。近期，为实现按需式读取，他们采用了一种改进的量子存储方案，即电场调制的原子频率梳方案，通过引入两个电脉冲可实时操控稀土离子的演化，从而控制存储器的读出时间。
使用飞秒激光等技术，研究组首次研制出按需式读取的可集成固态量子存储器，存储保真度达到99.3%±0.2%，表明其具有极高的可靠性。
该成果对实现大容量量子存储和构建量子网络都有重要意义。国际知名学术期刊《物理评论快报》日前发表了该成果。
Code:
http://m.xinhuanet.com/ah/2021-01/02/c_1126938165.htmand..
China Telecom launches the first quantum secure communication product
1 minute
yesterday 04:59 PM (GMT+8)
Recently, China Telecom officially announced that it has launched the industry's first quantum secure communication product "quantum secret phone", which is developed by China Telecom Quantum Technology Co., Ltd., which is controlled by China Telecom. It has high-level security and is implemented in the form of app. It has been applied to a variety of Android models and has been successfully put into commercial trial in Anhui. (interface News)
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