What is brought to us by A Brief History of Time

This summer, after reading "A Brief History of Time", I realized how small I was in front of this physics master, Stephen Hawking. What the master brought us is the essence of physics. According to his words, I have some ideas of my own.

The first is the thought mentioned in the book. This kind of thought has great significance for the progress of modern physics, combining the classical general theory of relativity with quantum theory. In the history of modern physics in the past 100 years, many people are making similar attempts, including Einstein himself, who is also doing a theory of relativity that is in harmony with quantum theory, but he retreats and finally he Putting your eyes on the cosmological constant is the failure of this genius. Many people have done many marginal disciplines for the harmony of quantum theory and relativity, but I personally think that it is not as thorough as that of Master Hawking. Quantum gravity theory, quantum is the discontinuous motion of matter particles, and all quantum puzzles Both originated from this discontinuous movement. The combination of quantum theory and gravity, the theory of quantum gravity, is still in the research stage. The history of this theory is long. The famous general relativist Penrose, after solving the Dirac equation in Chandrasek, proved the black hole's area theorem together with Hawking. Then Hawking made the black hole thermal radiation theorem. The non-decremental performance of the black hole area naturally reminds us of the physical quantity called entropy, and the black hole also has the characteristic of entropy.

From a mathematical point of view, regardless of whether quantum gravity theory is a grand unified theory, it has its meaning and has a good influence on physics.

Hawking’s description of the time arrow is very interesting, and I can’t help but think of the era when philosophy and scientific theory have gone hand-in-hand, but now science is too mathematical for philosophers, so that Wiegandstein says: philosophy is only Analyzed the language.

The time arrows are divided into three types. 1. Thermodynamic arrows. According to the second law of thermodynamics, entropy always increases with time, and vice versa as the entropy increases. 2. Psychology time arrows, both of which we think of the direction of time. 3. The cosmological time arrow, the universe expands with time, and vice versa as the universe expands.

Since it is very difficult to establish a steady-state cosmological model by mathematical methods, we stipulate that time in our world is real time. We can assume that there is a virtual time, using imaginary numbers to measure time, in virtual time. There are no singularities in the universe, so in the virtual time, no scientific laws will be violated, but in real time, there is a singularity, and the laws of science are destined to be violated here, but our doubts are Is it true time in the world we live in? Our current findings are not enough to prove that there are no singularities in our universe. This will be a mystery.

The third day: the will of quantum