Recently, the University of Science and Technology of China made many breakthrough research achievements in the quantum field. According to reports from the domestic media, Prof. Li Chuanfeng, a key laboratory of Quantum Information of the university, first developed a non-local quantum simulator and simulated the phenomenon of superluminal velocity in the world of Parity-time (PT).
This experiment fully demonstrates the important role of nonlocal quantum simulators in the study of quantum physics.
Quantum simulator is a special quantum computer to solve a specific problem, the concept was first proposed by Feynman in 1981. Feynman thinks nature follows quantum mechanics essentially, and it can only be modeled better by a device that follows quantum mechanics. The mechanics are quantum simulators. At present, in the research of quantum simulator, more attention is given to its quantum acceleration ability. Usually, the more quantum bits a quantum simulator manipulates, the more computing power it will have.
The parity-time symmetry theory was proposed by the American physicist Bender to quantum mechanics in 2002.
Under this theory, the quantum world is only a special case of the parity-time world. The research team of Professor Li Chuanfeng, Key Laboratory of Quantum Information, Chinese Academy of Sciences, China, successfully simulated the parity-time world.
Their approach is to distribute the entangled photon pair to two non-local quantum simulators in two laboratories 25 meters apart. The results show that using the quantum ghost "ghostly hyperspace effect", the PT symmetry evolution of photons enables information More than 1.9 times the speed of light from one laboratory to another laboratory. However, if you consider the entire system, the overall transmission speed of information can not exceed the speed of light.
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