Attention from British media: Hefei operates the most advanced quantum metropolitan area network

Reported by Reference News on September 18thAccording to the website of New Scientist magazine in the UK on September 14th, the most advanced quantum communication network to date is spread throughout the Chinese city of Hefei. The quantum metropolitan area network in Hefei is composed of quantum devices and central servers, making it the closest quantum internet that humans currently possess to the level of "invincibility"

Reported by Reference News on September 18thAccording to the website of New Scientist magazine in the UK on September 14th, the most advanced quantum communication network to date is spread throughout the Chinese city of Hefei. The quantum metropolitan area network in Hefei is composed of quantum devices and central servers, making it the closest quantum internet that humans currently possess to the level of "invincibility".

The quantum network in Hefei has some commonalities with traditional communication networks, such as transmitting information through optical fibers. However, quantum networks transmit information with characteristics that traditional methods do not have. They can utilize the properties of quantum entanglement to make it almost impossible to steal or change information, making the entire network particularly secure.

Similar quantum networks have been built before (elsewhere), but the quantum metropolitan area network in Hefei is particularly prominent due to its inclusion of devices such as quantum memory.

Mahdi Namazi, one of the founders of Quinnect, a quantum communication startup in New York, believes that in the past, the integration of devices such as processors, fiber optics, and memory was too complex, resulting in many potentially malfunctioning nodes. Namazi said that past experiments have pointed out promising steps in building this network, and that (the quantum metropolitan area network in Hefei) is a true "networking super experiment".

Sida Josh, a lecturer in optical communication courses at the University of Bristol in the UK, said: 'This is a very interesting milestone on the path of quantum internet (development).' He said that quantum memory is the most important new component because they have never been applied in such a large-scale network before. They are widely regarded as key elements that enable quantum communication networks to expand enough to establish connections between different cities. However, Josh believes that the information sharing speed of the entire quantum network in Hefei still needs to be improved in order to make the network useful.

The main challenge of making such a network cover longer distances and have more nodes is to improve the performance of quantum memory, "said Zhong Tian, an assistant professor at the University of Chicago in the United States. Both Josh and Zhong Tian believe that improving the storage performance of memory will enable the network to transmit information faster and more efficiently. (Compiled by Shen Jian)

From May 16th to 18th, the 2023 World Telecommunication and Information Society Day Conference and series of activities were held in Hefei, Anhui Province. The exhibition showcased a series of new information technology achievements such as "Quantum Technology and Network Security", "5G New Infrastructure", and "Cloud Network Integration". (Xinhua News Agency)

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