Recently, the Chinese Academy of Sciences held a press conference in Beijing, announcing that the "Mozi" quantum science experimental satellite achieved all three established scientific goals ahead of schedule and successfully realized the first quantum key distribution from satellite to the ground and from the ground. Quantum teleportation to the satellite. This is another two major breakthroughs in space quantum physics research conducted by Chinese scientists using the "Mozi" quantum satellite after the first internationally realized two-dimensional quantum entanglement distribution of thousands of kilometers of stars and non-localized testing of quantum mechanics.
Figure 1 "Mozi No." - Xinglong Ground Station Quantum Key Distribution Experiment Site Map
(Source: University of Science and Technology of China official website)
Quantum is the smallest basic entity in the physical world. It has a magical feature: firstly there are multiple superposition states of possible states, and only when they are observed or measured, will they randomly show a certain state. "This is like Sun Wukong's avatar," explains Pan Jianwei, chief scientist of Quantum Satellite and academician of the Chinese Academy of Sciences.
Secondly, quantum has an entangled state, which means that two entangled quantums are like twins with electrocardiographic induction. No matter how far the distance between two people is, when the state of the brother changes, the state of the younger brother changes as the same happens. .
According to the two states of quantum, quantum communication is divided into two types. One is quantum secure communication, which can realize unconditional and secure communication, and will not be eavesdropped and deciphered. The other is quantum teleportation, which can The unknown quantum state is accurately transmitted to distant locations without transmitting the particles themselves. "Like the muscle cloud, realize instant transmission." This quantum satellite launch is mainly to carry out experiments such as the high-speed quantum key distribution of the Earth and the quantum teleportation of the Earth Star.
Figure 2 "Mozi No." - Ali's ground station quantum teleportation experiment site map
(Source: University of Science and Technology of China official website)
The success of this experiment is another major scientific achievement made by the joint research team of the Chinese Academy of Sciences led by Professor Pan Jianwei of the University of Science and Technology of China. Professor Pan Jianwei is a long-term customer of Quantum Design's Chinese subsidiary. Among them, Attocube's low-temperature and strong magnetic field liquid-free confocal microscope equipment has been running smoothly, helping Prof. Pan's research team to achieve more research goals.
Professor Pan Jianwei is learning about scientific research in a large number of sub-storage laboratories in China.
The successful completion of the Xingdi high-speed quantum key distribution experiment and the geostationary quantum teleportation experiment have enabled the secure communication rate to be trillions of times higher than the traditional technology, laying a solid scientific and scientific foundation for building a quantum secure communication network covering the whole world. The technical foundation and the first step towards the experimental exploration of quantum physics and quantum gravity at the spatial scale. At the same time, it also marks that China's research in the field of quantum communication has reached a leading position in the international market. The two results were published online on August 10 in the internationally authoritative academic journal Nature.
references:
1. Satellite-to-ground quantum key distribution. Nature (2017) doi:10.1038/nature23655.
2.Ground-to-satellite quantum teleportation. Nature (2017) doi:10.1038/nature23675.
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