American, Chinese scientists make world's fastest man-made rotor
                           Source: Xinhua | 2018-07-21 02:38:34 | Editor: huaxia

          Tongcang Li and Jonghoon Ahn levitate a nanoparticle in vacuum and drive it to rotate at high speed, which they hope will help them study the properties of vacuum and quantum mechanics. (Credit: Purdue University/Vincent Walter)

          WASHINGTON, July 20 (Xinhua) -- American and Chinese researchers have created the fastest man-made rotor in the world, spinning at more than 60 billion revolutions per minute or over 100,000 times faster than a high-speed dental drill.

          They described in a study published on Friday in the journal Physical Review Letters a tiny dumbbell from silica they synthesized.

          They levitated the dumbbell in high vacuum using a laser. The laser can work in a straight line or in a circle: when it's linear, the dumbbell vibrates, and when it's circular, the dumbbell spins.

          A spinning dumbbell can function as a rotor, and a vibrating dumbbell can function like an instrument for measuring tiny forces and torques, known as a torsion balance, according to the study.

          "This study has many applications, including material science," said Li Tongcang, an assistant professor of physics and astronomy at Purdue University, who collaborated with researchers from Peking University, Tsinghua University and the Collaborative Innovation Center of Quantum Matter in Beijing.

          Those rotating devices were previously used to discover things like the gravitational constant and density of Earth, but the researchers hoped that as the devices became more advanced, they would be able to study things like quantum mechanics and the properties of vacuum.

          "People say that there is nothing in vacuum, but in physics, we know it's not really empty," Li said.

          "There are a lot of virtual particles which may stay for a short time and then disappear. We want to figure out what's really going on there, and that's why we want to make the most sensitive torsion balance."

          By observing this tiny dumbbell spin faster than anything before it, Li's team may also be able to learn things about vacuum friction and gravity.

          Understanding these mechanisms is an essential goal for the modern generation of physics, Li said.

          Back to Top Close
          Xinhuanet

          American, Chinese scientists make world's fastest man-made rotor

          Source: Xinhua 2018-07-21 02:38:34

          Tongcang Li and Jonghoon Ahn levitate a nanoparticle in vacuum and drive it to rotate at high speed, which they hope will help them study the properties of vacuum and quantum mechanics. (Credit: Purdue University/Vincent Walter)

          WASHINGTON, July 20 (Xinhua) -- American and Chinese researchers have created the fastest man-made rotor in the world, spinning at more than 60 billion revolutions per minute or over 100,000 times faster than a high-speed dental drill.

          They described in a study published on Friday in the journal Physical Review Letters a tiny dumbbell from silica they synthesized.

          They levitated the dumbbell in high vacuum using a laser. The laser can work in a straight line or in a circle: when it's linear, the dumbbell vibrates, and when it's circular, the dumbbell spins.

          A spinning dumbbell can function as a rotor, and a vibrating dumbbell can function like an instrument for measuring tiny forces and torques, known as a torsion balance, according to the study.

          "This study has many applications, including material science," said Li Tongcang, an assistant professor of physics and astronomy at Purdue University, who collaborated with researchers from Peking University, Tsinghua University and the Collaborative Innovation Center of Quantum Matter in Beijing.

          Those rotating devices were previously used to discover things like the gravitational constant and density of Earth, but the researchers hoped that as the devices became more advanced, they would be able to study things like quantum mechanics and the properties of vacuum.

          "People say that there is nothing in vacuum, but in physics, we know it's not really empty," Li said.

          "There are a lot of virtual particles which may stay for a short time and then disappear. We want to figure out what's really going on there, and that's why we want to make the most sensitive torsion balance."

          By observing this tiny dumbbell spin faster than anything before it, Li's team may also be able to learn things about vacuum friction and gravity.

          Understanding these mechanisms is an essential goal for the modern generation of physics, Li said.

          010020070750000000000000011100001373384611
          无码人妻一区二区三区四区av_亚洲精品911在线永久观看_精品一区二区国产在线观看_日韩不卡一区二区视频在线

                  中出国产乱子伦中文字幕在线 | 日本色色的视频一区 | 中文字字幕精品码 | 五月天久久综合一区 | 又大又黄又爽在线观看免费视频 | 综合久久久久综合 |