Is quantum field theory accepted?

Over the past century, quantum field theory has proved to be the single most sweeping and successful physical theory ever invented. But quantum field theory, or QFT, is indisputably incomplete. Neither physicists nor mathematicians know exactly what makes a quantum field theory a quantum field theory.

Is it true that physicists don’t understand quantum mechanics?

He described quantum mechanics as a black box, and said “physicists don’t understand their own theory any better than a typical smartphone user understands what’s going on inside the device”. He also said it’s surprising that physicists are OK with not understanding the most important theory they’ve got. Damn right it is.

Do physicists understand their own theory?

Carroll isn’t, and quite right so. He described quantum mechanics as a black box, and said “physicists don’t understand their own theory any better than a typical smartphone user understands what’s going on inside the device”. He also said it’s surprising that physicists are OK with not understanding the most important theory they’ve got.

Does the standard quantum theory change the relativity theory?

The standard quantum theory we shall consider here makes no changes to the ideas of space and time of relativity theory. Most standard quantum theories are formulated within spaces and times that conform to Einstein’s special theory of relativity or even just to Newton’s account.

What is the difference between classical and quantum physics?

Classical Newtonian physics also breaks down when we consider very small systems, such as individual atoms and the particles from which they are made. Quantum theory gives us our best account of nature in the very small. The standard quantum theory we shall consider here makes no changes to the ideas of space and time of relativity theory.