Science and Technology News Morning Express丨my country's research team extracted nearly perfect quantum entanglement for the first time

>> Chinese scientists have made important progress in quantum entanglement research

According to the University of Science and Technology of China, Yu Sixia, Sun Liangliang, Zhou Xiang from the university, Xu Zhenpeng from Anhui University, and scholars from Lund University in Sweden have collaborated to upgrade the experiment of detecting entanglement to an experiment of estimating the size of entanglement at zero cost, solving important problems in a comprehensive way and making entanglement experiments touch upon many entanglement measurements. The relevant results were recently published in Physical Review Letters.

＞＞Eight ancient city ruins discovered in Xiongan New Area

According to the Xiongan New Area Cultural Relics Protection and Archaeology Station of the Hebei Provincial Institute of Cultural Relics and Archaeology on the 28th, 8 ancient city sites have been confirmed to be discovered in the "City of the Future" Xiongan New Area, namely Nanyang Site, Guxian Site, Chengzi Site, Xiongzhou Ancient City Site, Anzhou Ancient City Site, Xin'an Ancient City Site, Ouzhou City Site and Guzhou City Site. A large number of cultural relics have been found among them, spanning thousands of years with a clear inheritance lineage.

Archaeological excavation site of Nanyang Ruins in Xiongan New Area (taken on March 26, drone photo).

Image source: Xinhua News Agency (Photo by Mou Yu)

>> my country has more than 1.26 million drones

According to data released by the Civil Aviation Administration on the 29th, by the end of 2023, there will be 1.267 million drones registered in my country, a year-on-year increase of 32.2%. Civilian drones have taken the lead in achieving industry popularization in the fields of agriculture, forestry, animal husbandry, fishery and recreational aerial photography.

＞＞"Xuelong" and "Xuelong 2" cross the equator and return to the Northern Hemisphere

The Xuelong and Xuelong 2, which are carrying out China's 40th Antarctic expedition, crossed the equator and returned to the northern hemisphere on the 29th. The two ships will go to Qingdao and Hong Kong respectively to carry out commemorative activities for the 40th anniversary of China's polar expedition.

It is reported that during this expedition, the expedition team carried out electromagnetic detection of subglacial bedrock by drone for the first time in the Larsmann Hills of East Antarctica, successfully collected bedrock electromagnetic data and achieved three-dimensional resistivity imaging. This marks a new breakthrough in my country's Antarctic geological survey and provides strong support for Antarctic geological survey and geoscience research.