The first satellite communication quantum manages to send data back to earth

EFE


  • quantum communication allows a data transmission system faster than the current and impossible to intercept ymás remote.
  • Is based on changes of state in subatomic particles like photons and a satellite chinese have been the first to achieve from the space.
  • scientists expected that the communications quantum to fundamentally change the human development in the next two or three decades.

Schema of a satellite

The first satellite communication quantum that China put in space a year ago he managed to successfully send data to the earth, laying the groundwork to build a global network of communication quantum, according to informed official sources.

The official news agency Xinhua explained that the QUESS, acronym in English of “Experiments with Few Spatial Scale”, has operated with success, and that their results have been published in the academic journal Nature.


chinese scientists have become the first to realize the key distribution quantum to the earth from a satellite, after that in August of last year was shipped from the center space launch of Jiuquan, in the Gobi desert (in northwest China), at an altitude of 500 kilometers.

quantum communication is based on changes of state in subatomic particles such as photons, and in practice could be two great uses: a system of data transmission faster that the current and impossible to intercept, and, more remote and complicated, teleportation.

the united STATES, Europe or Japan have already experienced with communication quantum on the surface, but China, which has also started to develop a transmission network of this type between Beijing and Shanghai, is the first that takes the research into space.

The team chinese scientist who developed these experiments is led by the quantum physicist Pan Jianwei, who explained that the satellite sent keys quantum to ground stations in Xinglong (Hebei, northern China) and Nanshan (Xinjiang).

The communication distance between the satellite and the ground station varies from 645 kilometres to 1,200 kilometres and the speed of transmission of the key quantum is up to 20 orders of magnitude more efficient than experienced using an optical fiber of the same length.

When the satellite flies over the China provides a window of the experiment of about 10 minutes. During that time, the secure key 300 kb may be generated and sent by the satellite, as explained Bread.

“That, for example, can satisfy the demand to make a phone call to secure an absolute or to convey a large amount of data bank“, he added.

“The key distribution quantum-based satellites can be linked to networks of quantum metropolitan” and serve to “connect to numerous users within a city of more than 100 miles,” the scientist added.

scientists expected that the communications quantum fundamentally change the human development in the next two or three decades, as there are huge prospects to apply this new generation of communication in fields such as defence or finance.

Tecnología

The first satellite communication quantum manages to send data back to earth
Source: english  
August 15, 2017


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