1974, his research turned to the theory of quantum gravity. Although people haven't got a successful theory, they have found some characteristics of it. For example, spacetime is not flat on the Planck scale (10-33 cm), but in a powder state. There is no pure state in quantum gravity, the law of causality is broken, and the unknowability rises from classical statistical physics and quantum statistical physics to the third level of quantum gravity.
After 1980, Hawking's interest turned to quantum cosmology.
However, in July 2004, he revised his original "black hole paradox" view, and information should be lasting.
The subtitle of this book is From BIGBANG to Black Hole. Stephen william hawking believes that his life's contribution is within the framework of classical physics, which proves the inevitability of black holes and big bang singularities, and black holes are getting bigger and bigger; However, under the framework of quantum physics, he pointed out that black holes became smaller and smaller due to radiation, and the singularity of the Big Bang was not only smoothed out by quantum effects, but the whole universe also started from here.
The details of theoretical physics will change in the next 20 years, but as far as concept is concerned, it is quite complete now.
Stephen william hawking's life is legendary. As far as scientific achievements are concerned, he is one of the most outstanding scientists in history. His contribution was made when he was confined to a wheelchair by Luger's disease for 20 years, which was really unprecedented. His contribution has a far-reaching impact on the concept of human beings, so the media has long had a lot of descriptions about how he fought against total paralysis. Therefore, God is fair to everyone. He has a physical defect, but his mind is smart! Nevertheless, one of the translators (Wu) saw him for the first time at 1979. It was my first time to attend the seminar on general relativity of Hawking Group in Cambridge. As soon as the back door opened, a very weak electric sound suddenly sounded behind my head. Looking back, I saw a scrawny man reclining in an electric wheelchair and turning on the electric switch himself. The translator tries to be polite and not too surprised, but he is used to being surprised at the degree of disability of people who meet for the first time. He needs a lot of effort to raise his head. Before he lost his voice, he could only speak in a very weak deformed language, and he could only understand it after working and living with him for several months. He can't write, and reading must rely on a page-turning machine. When reading literary works, he must spread out every page on a big desk, and then he drives a wheelchair to read page by page like a silkworm eating mulberry leaves. People have to pay deep respect to the human soul who pursues the ultimate truth with such a strong will. From his help to the translator's private affairs, we can realize that he is a person. Every day, he drives a wheelchair from his home at No.5 Cambridge West Road, crosses the beautiful Jianhe River and the ancient King's College, and arrives at the office of the Department of Applied Mathematics and Theoretical Physics in Silver Street. A slope was specially built in the department to facilitate him to take a wheelchair. Hawking is optimistic. Although he is physically disabled, he is not mentally retarded.
He also proved the area theorem of black holes. In Cambridge University with rich academic tradition, his position is the most lofty professorship in the history of Cambridge University. That's Professor Lucas, who was once praised by Newton and Dirac. He holds several honorary degrees and is the youngest member of the Royal Society. In the public evaluation, he is considered as one of the most outstanding theoretical physicists after Albert Einstein. He proposed that the big bang started from the singularity, and the black hole would eventually evaporate from this moment, which was an important step to unify the two basic theories of physics in the 20th century-Einstein's theory of relativity and Planck's quantum theory.
He was confined to a wheelchair for 40 years because of "gradual freezing" (Luger's disease of amyotrophic lateral sclerosis), but he was physically and mentally disabled and turned it into an advantage, overcoming his disability and becoming a supernova in the international physics community. He can't write or even read clearly, but he transcends relativity, quantum mechanics and the Big Bang theory and enters the "geometric dance" to create the universe. Although he was so helpless in a wheelchair, his thoughts traveled brilliantly in the vast space and time, and solved the mystery of the universe.
Hawking's charm lies not only in his legendary physical genius, but also in his convincing life force. His constant pursuit of scientific spirit and brave and tenacious personality strength deeply attracted everyone who knew him. Suffering from amyotrophic lateral sclerosis, he is almost paralyzed and unable to pronounce, but he still published A Brief History of Time at 1988, which has sold more than 25 million copies so far and become one of the best-selling popular science works in the world.
He is praised by the world as "the greatest living scientist", "another Einstein", "an out-and-out man in life", "a man who dares to challenge his destiny" and "the king of the universe".