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11 hours ago · General relativity, also known as the general theory of relativity and Einstein's theory of gravity, is the geometric theory of gravitation published by Albert Einstein in 1915 and is the current description of gravitation in modern physics. General relativity generalizes special relativity and refines Newton's law of universal gravitation ...
3 days ago · Stanford Institute for Theoretical Physics. Our research includes a strong focus on fundamental questions about the new physics underlying the Standard Models of particle physics, cosmology, and gravity; and the nature and applications of our basic frameworks (quantum field theory and string theory) for attacking these questions.
1 day ago · Jake Carter. May 26, 2024 3:34 am. PLUS+ Content Science and Technology. Scientists claim that, at least at the theoretical level, time travel is possible. There is no mathematical reason to show that a time machine cannot go beyond time and return to the past, they suggest. The study, “Traversable acausal retrograde domains in spacetime ...
4 days ago · A complete Lagrangian would need to account for this multitude of “hadron” particles, but their sheer numbers were overwhelming. Paolo Di Vecchia, an emeritus professor at the Nordic Institute for Theoretical Physics, recalled the sentiment of the time. “Should we write a Lagrangian containing all the hadrons? It did not seem the thing to ...
5 days ago · yesterday. 2. If "time is a loop," then every moment that is in our past also is a moment in our future, and vice versa. There would be no distinguished point that is the beginning of time, and no distinguished point that is the end of time. So, take a look back at yesterday, and ask yourself, "How do we go forward in time, and get to a day ...
2 days ago · Noether's theorem is used in theoretical physics and the calculus of variations. It reveals the fundamental relation between the symmetries of a physical system and the conservation laws. It also made modern theoretical physicists much more focused on symmetries of physical systems.
