China Education Equipment Purchasing Network News: The Chinese Academy of Sciences recently quoted the American Physicists Organization Network as reporting on June 6. Recently, Swedish physicists said that they used special equipment to create a visible in a "nothing" vacuum. Light. The research paper is said to have been published on arXiv.org, a well-known free electronic website in physics. If the experiment is confirmed, it will be one of the most bizarre experimental evidences of quantum effects in recent years, and also a "significant milestone". Quantum theory believes that "virtual particles" thought to exist in a quantum vacuum can be used to make visible photons, but this theory has not been experimentally confirmed. Quantum theory believes that a vacuum is actually a sea of ​​energy that keeps fluctuating, and particles transform between it and everything. These particles are fleeting, so they are often considered "virtual particles." However, they have tangible quantum effects. As an example in the article, if two mirrors are placed very close together, the number of "virtual" light particles (photons) that can exist between them is limited. This means that more virtual photons exist outside the mirror than between the mirrors, and they will create a Kashmir force that causes the two mirrors to cling to each other. Kashmir force was originally proposed by Henrik Kashmir of the Netherlands in 1948. It cannot be explained in the category of classical physics, and is a pure quantum effect. The article also stated that decades ago, theorists predicted that a fast-moving mirror would also produce the same effect. The theory is that a mirror can obtain energy from "virtual" photons that fall on its surface, and then re-emit these energies like real photons. However, this effect occurs only when the moving mirror passes through the vacuum at a speed very close to the speed of light, but it is difficult for ordinary mechanical devices to achieve this. The physicist Pell Delsin of Chalmers University of Technology in Sweden and his colleagues circumvented this problem with a device called a superconducting quantum interference device (SQUID), which is used to measure extremely weak signals ( For example, a device with a weak change in the electromagnetic field of the human body), which is quite sensitive to magnetic fields. They made a superconducting circuit and placed SQUID in it. SQUID played the role of a mirror. The magnetic field of SQUID caused this "mirror" to move slightly, changing the direction of the magnetic field billions of times per second. The "swinging" speed will reach 5% of the speed of light. At this time, the research team observed that a large piece of vibrating microwave photon "dropped" from the vacuum like a sky flower. Upon further analysis, it was found that, as quantum effects had previously predicted, the frequency of the photon was almost half of the frequency of its "swinging" mirror. Federico Capasso, a physicist at Harvard University who is also engaged in quantum effect research, said that this is a very important progress. Although this effect has no practical use because it cannot generate a large number of photons, it can well demonstrate the quantum effect. In the future, a moving piece of metal will create detectable light from a vacuum. Macaron Silicone Baking Mat,Silicone Rolling Baking Mat,Baking Pastry Mat,Silicone Baking Mats Changshu Xinneng Silicone Products Co., Ltd. , https://www.xnsilicone.com