So far, there are many misunderstandings and assumptions about time reversal, and there is no experiment to confirm this.
Will time go backwards when it exceeds the speed of light? What ideas are involved in the study of superluminal?
This is an exploratory study, which plays a great role in the development of physics. As early as 1970s, Qin Yuanxun, director of the Institute of Mathematics, Chinese Academy of Sciences, proposed that Lorentz transformation should change sign at superluminal speed, and the root of (1-m 2) should become the root of (m 2- 1), with m = v/c, and the curve fitted by Professor Cao of Beijing Normal University according to the supernova data in 1990s was also consistent with the above results. This is the essence of aerodynamics. It is also Lorenz's own assumption that only the above coefficient transformation is added to the motion direction of the wave equation with constant density. At that time, no one thought that the equation obtained by Lorenz's own transformation turned out to be a small disturbance acoustic equation.
At present, the new research on dark energy is calculated by equations similar to N-S equation. Different from aerodynamics, it adopts the equation of state with constant density, so a transformation should be added after calculation, which is called relativistic transformation in theory and physics; Or attach an equation through the assumption of metric invariance. This additional equation is called metric invariance.
The only difference of aerodynamic method is that it uses the state equation of density change, so the same result can be obtained without additional assumptions and equations. Of course, aerodynamics used to have an approximate algorithm, that is, first calculate a "static result" according to the equation with constant density, and then add the transformation needed for density change. In fact, these steps are all shortened in the X direction (1-m2) just like the main part of the transformation formula and the hidden object. This is called similarity transformation in aerodynamics (Growell transformation, Plante transformation).
The former requires additional assumptions. When the speed of light reaches infinite mass, there will be complex numbers beyond the speed of light, so going back to the past, the hypothesis of traveling through time and space will follow.
In fact, these difficulties have also been encountered in the development of continuum mechanics. According to the small disturbance approximation theory, the sound velocity point is infinite, and there are also complex numbers when calculating supersonic speed by subsonic equation, which is called complex characteristic method and has been introduced in aerodynamic design manual. Therefore, Northwestern Polytechnical University, Qiao Zhide, Luo, Du and Xu Ming primary school professors all supported this exploration. Many young professors at that time, such as Xu Jiadong, Chen Changle, Bai Cunru and so on, and even many experts in Ann (history of Anjjiaotong University, xidian university, Professor Zhang of Northwest University and Professor Li Kaitai of Xi Jiaotong University) also actively participated. Under this circumstance, entrusted by the Commission of Science, Technology and Industry for National Defense, Northwestern Polytechnical University held the International Conference on Relativity and Modern Physics Innovation in 2003.
At that time, some people said that the speed of light was nearly a million times higher than the speed of sound, and their physical properties would be qualitatively different! But the dimensionless equations of light and sound are exactly the same, which means the laws are the same.
At the end of 2004, Academician Song Jian held the "Symposium on Photobarrier and Space Science". At that meeting, Academician Song Jian and Professor Bai of Tsinghua University put forward a plan to modify the theory of relativity mentioned in foreign reports. If V/C in the theory of relativity is changed to V/C0, superluminal speed can be achieved, and C0 is a number slightly larger than the speed of light C. Scholars attending the meeting asked how it came about and explained it clearly. This is Qian Xuesen's card money formula and an approximate expression of continuum mechanics. Then there is the theoretical background, how Maxwell's equations are derived from continuum equations, how the theory of this subject is applied in experiments, and how the accelerator accelerates the speed of light by reducing energy. It was also mentioned that Pei Yuanji, director of the accelerator academic committee of China University of Science and Technology, supported this experiment, and tried to reduce the energy instead of increasing it when the accelerator electrons accelerated to 0.99999 times the speed of light to see if there would be superluminal electrons. Academician Song Jian was very excited and said during the dinner, "I have been looking for this theory, and this explanation is clearer than me. Do you think it is possible? " Academician Chen Jiaer also promised. After that meeting, some comrades who attended the Xiangshan meeting held a seminar on basic science in Beijing, which was discussed every two years. Academician Song Jian called several other academicians to set up a cutting-edge scientific magazine to support the unknown exploration.
In recent years, more and more people know about it. The electromagnetic field equation derived from continuum equation can be used as a method to calculate electromagnetic field. It was calculated by Northeastern University as the theoretical basis for applying for the key fund of the Ministry of Education and achieved results. Dark energy exploration, as a hidden substance of similar theory, was not recognized in the past, but now it has been included in the natural science foundation, among which the Ninth Academy and Beijing Academy are the most active.
The news of European neutrino experiment actually touched a lot. Professor Luo, who returned to China with Qian Xuesen, immediately wrote to colleagues in the United States and students at home and abroad, asking them to pay attention to this trend.
On October 20111710, Science and Technology Daily hosted an academic seminar on superluminal science, the central topic of which was "superluminal experiments of European scientists and the responsibilities of China scientists". Academician Cheng Jinpei, former Vice Minister of Science and Technology, and Academician Zhang Zhonghua of China Academy of Engineering attended the meeting. Cheng Jinpei said that the European OPERA experiment is to explore whether the one-way speed of light can exceed C, which is a major challenging topic and related to the original innovation in theory. It is normal for scientific issues to be debated, and constructive opinions on the theory of relativity are allowed. At present, the original thinking of the scientific community in China is very insufficient, and a tolerant environment should be provided for different opinions to be expressed. I hope that a group of young experts can sit in the front row and take the lead in the future. In addition, I hope that the comrades sitting here will do a good job of popularization and try to let everyone know and understand, at least the reporters can understand.
Academician Zhang Zhonghua said that Academician Song Jian called him and told him that he would support this research. He went on to say: "To do scientific research, you must have spirit, be willing to be lonely, and stick to it even if it is not recognized by the mainstream. This is the true meaning of scientific pursuit. ..... Although it is very difficult to challenge the traditional theory, we should do it bravely. " A total of nine people made academic reports at the meeting. Cao Zhang, Tan Shusheng and Lin Jin all talked about the theory of variable light speed and superluminal speed. Huang Zhixun, Pei Yuanji and Yang Xintie gave a report entitled "Superluminal Experiment Scheme of Electron Accelerator". It is proposed that the mathematical structure of continuum mechanics can explain the phenomenon of relativity. The mathematical equation at superluminal speed is hyperbolic, so it is necessary to reduce the energy at superluminal speed to accelerate. In the past, all accelerator designs were blindly increasing energy, and this method could not be used for superluminal research. It is suggested to reduce the energy of electrons after accelerating to the speed of light (such as inversion, quantum barrier, etc.). ) In order to search for exotic electrons with a speed greater than C, Pei Yuanji, a professor at the National Synchrotron Radiation Laboratory of China University of Science and Technology, also talked about how to design an accelerating tube with a phase speed of 1.05c (length1.2m); Generating an electron beam with a beam length of ps level; Then adjust the phase shifter and measure the beam energy of different phases. Look for doubts and reasons through preliminary experiments.
After the meeting, everyone continued to discuss. Professor Jiang proposed an experiment done in Russia, in which electrons were accelerated by pulses to hit a target, and then 62 times the speed of light was found 2 kilometers behind the target. In addition, after discussion, we can also analyze the energy loss characteristics of synchrotron radiation electrons during rotation, so as to explore the saddle point characteristics and discontinuity characteristics in superluminal region. These are similar to the mathematical laws of aerodynamic models.
The meeting was reported on the front page of Science and Technology Daily on June 5438+065438+ 10/0. After the meeting, Academician Cheng Jinpei called Huang Zhixun and asked for active follow-up. If there were any questions, he asked Director Peng of the Basic Department of the Ministry of Science and Technology, and he also attended the meeting. At Qian Xuesen's centenary birthday party held a week ago, Academician Song Jian pointed out: "The answer is that there is no Huaihai Campaign. Only when there is a big battle can there be a leading commander, and dare to engage in big scientific projects. Only when the big science project wins, the leading figures will inevitably appear. " Sadly, there is much tracking now, and originality is basically not recognized.
In a word, the current exploration of superluminal just spans the disciplines of dielectric electricity, acoustics, optoelectronics and so on, and someone is urgently needed to lead this field, hoping to have a clear understanding of this situation. In order to make full use of the conditions to promote this research, it will not only contribute to the development of physics, but also have a favorable impact on the construction of interdisciplinary subjects. References:
/Relativity belongs to approximation /ihome/myblog.