Swiss scientists classify quantum "entanglement"

Editor's note: "Entanglement" is a basic feature of quantum mechanics, and this phenomenon has many different forms. Recently, physicists and mathematicians at the Swiss Federal Institute of Technology in Zurich have shown how to effectively and systematically classify different forms of quantum "entangled states", which helps to predict the possibility of applying a quantum state to new technologies. How big is sex.

When two or more particles are entangled, the interaction between them appears in different forms. Scientists have not fully understood why entanglement has these different manifestations, and so far there is no general method to systematically classify entanglement states. Now, the research team has developed a method that can classify a given quantum state into a certain class of possible entangled states.

The method points out that different types of entangled states are related to geometric shapes, that is, polyhedrons, and these shapes represent "space", which is some kind of entangled available space. Whether a given state belongs to a certain polyhedron can be determined by detecting individual particles, and there are many detection methods. The new method describes the possibility of entangled states by detecting individual particles. Not only is it very efficient, but it does not have to detect many particles at the same time. This is different from other methods, and it also means that it can be extended to multi-particle systems.

Multi-particle quantum systems may play an important role in future technologies, doing things that are completely impossible under the framework of classical physics. From anti-eavesdropping information transmission, efficient algorithms to solve computational difficulties, to technology to improve the resolution of photo printing. In these applications, the entangled state is a basic resource that accurately represents the difference between classical physics and quantum mechanics. With proper use, these complex conditions open the way for novel applications. The new method may be directly applied to those systems that use novel quantum technology.

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