Shulou(Shulou.com)11/24 Report--

CTOnews.com October 9 news, Jinan Institute of Quantum Technology Zhang Qiang, Jiang Yangfan and China University of Science and Technology Academician Pan Jianwei team cooperation, with rigorous experiments proved that complex number in quantum mechanics "indispensable," is the first time in the world. Relevant research results were published in the international authoritative academic journal Physics Review Letters.

On the basis of closing loopholes such as locality, measurement independence and entanglement source independence, the research team used entanglement switching optical quantum network to test quantum mechanics in real form, thus verifying the necessity of complex number in quantum mechanics with experimental accuracy exceeding 5.3 standard deviations.

CTOnews.com learned that quantum is the smallest discrete unit of phenomena. For example, photons are photons and electrons are electrons. Quantum comes from Latin and means "quantity" or "how many?" "stands for" substantial quantity of a substance." It means that if something can be quantified, then it can be measured.

Complex numbers consist mainly of imaginary numbers and real numbers. The term imaginary number was coined by the famous mathematician Descartes, and later Schrödinger, an Austrian theoretical physicist and one of the founders of quantum mechanics, introduced imaginary numbers into the wave equation to describe the quantum behavior of particles.

Although the wave function is in complex form, the probability of particle appearance is real, and Schrödinger himself tends to think that imaginary number is only a mathematical treatment method. Although some physicists including him have been trying to make quantum theory real, they have always lacked the support of experimental results. Therefore, the scientific research results obtained this time are of great significance to the research of international quantum mechanics.

In fact, this is not the first time that the two researchers have cooperated. As early as September 5,2019, Professor Wang Xiangbin, Professor Zhang Qiang and Liu Yang of Jinan Institute of Quantum Technology have cooperated with Professor Pan Jianwei Group of University of Science and Technology of China to realize dual-field quantum key distribution experiment in optical fiber of 300km real environment. This achievement not only completely realizes 300 kilometers of dual-field quantum key distribution, but also verifies the feasibility of long-distance quantum key distribution over 700 kilometers of optical fiber, becoming the basis of a new generation of long-distance intercity quantum key distribution.

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