Today, the topic of "observing parity time for the first time" has been on the hot search, which has attracted the attention and hot discussion of many netizens, but more people don't understand what parity time is. What's the matter with the first observation of parity time? What is parity time? This article has brought you a specific introduction. Let's have a look.
Parity time of first observation
The team of academician Du Jiangfeng of University of science and technology of China observed parity time symmetry for the first time in the world. This observation method and its process broke through the regulation method of quantum system in traditional quantum system, deepened the understanding of quantum system interaction, and helped people better understand the wonderful properties of the micro world.
What is parity time
"The four sides call the universe, the past and the present call the universe.". There are countless ordinary or wonderful symmetries in the vast universe. The universe representing space and the universe representing time are also a pair of 'symmetries'.
If matter satisfies both time and space symmetry, scientists believe that they satisfy parity time symmetry. In order to study various wonderful properties of matter, scientists will use various methods to regulate the parity time symmetry state.
On May 31, 2019, the international authoritative journal Science published the latest achievements of the research team led by academician Du Jiangfeng of University of science and technology of China, which observed parity time symmetry in the quantum world for the first time.
The regulation of parity time symmetry has been realized in the classical physical world. But in the quantum world, it is a huge problem. The theory of quantum mechanics determines that the path of parity time symmetry state in quantum system is very narrow and difficult.
Scientists make an analogy: in the world of quantum mechanics, Xiaoli needs to walk a narrow and muddy road full of thorns to become a self symmetrical with her current time and space. As a little girl with bare hands, Xiao Li, this is almost an impossible task.
Academician Du Jiangfeng's laboratory has been focusing on the research of quantum control of single spin system in recent years. Professor Rong Xing and Dr. Wu Min regulate the electron spin in a nitrogen vacancy defect in diamond as the system bit. They skillfully add the nuclear spin as the auxiliary bit, realize the parity time symmetric regulation of electron spin, and complete the 'zero breakthrough' in this field.
This means that smart physicists build a special small world, skillfully add the nuclear spin auxiliary bit 'Xiaoming' through quantum regulation, let Xiaoming hold Xiaoli's hand and guide Xiaoli to complete the wonderful double dance. Although this road is tortuous and bizarre, it implies symmetry and realizes the parity time symmetry construction in the quantum world.
Academician Du Jiangfeng said: "this work has laid a solid foundation for further study of novel physics described by non-traditional quantum systems."