Quantum mechanics brought an unexpected fuzziness into…

Quantum mechanics brought an unexpected fuzziness into physics because of quantum uncertainty, the Heisenberg uncertainty principle.

— Edward Witten

“‎Theorists of journalism have long noted parallels to Heisenberg's uncertainty principle in physics: by reporting on something, one subtly but irrevocably changes it.”

— Ben Yagoda

Old Newtonian physics claimed that things have an objective reality separate from our perception of them. Quantum physics, and particularly Heisenberg's Uncertainty Principle, reveal…

— Marianne Williamson

“Many scientists have tried to make determinism and complementarity the basis of conclusions that seem to me weak and dangerous; for instance, they have…

— Louis de Broglie

“Heisenberg’s uncertainty principle states that to determine the precise location of a particle will only speed up the particle. The same goes for a…

— Weike Wang

“Many of the important principles in twentieth century physics are expressed as limitations on what we can know. Einstein's principle of relativity (which was…

— Lee Smolin

“Those “weird evolutions” enabled by a CTC, Ringbauer notes, would have remarkable practical applications, such as breaking quantum-based cryptography through the cloning of the…

— Anonymous

“Heisenberg's uncertainty relation measures the amount by which the complementary descriptions of the electron, or other fundamental entities, overlap. Position is very much a…

— John Gribbin

Superstring theories provide a framework in which the force of gravity may be united with the other three forces in nature: the weak, electromagnetic…

— Edward Witten

Technically you need the extra dimensions. At first people didn't like them too much, but they've got a big benefit, which is that the…

— Edward Witten

I just think too many nice things have happened in string theory for it to be all wrong. Humans do not understand it very…

— Edward Witten

One very important aspect of string theory is definitely testable. That was the prediction of supersymmetry, which emerged from string theory in the early…

— Edward Witten

Even before string theory, especially as physics developed in the 20th century, it turned out that the equations that really work in describing nature…

— Edward Witten

String theory is 21 st century physics that fell accidentally into the 20th century.

— Edward Witten

So when you ask me how string theory might be tested, I can tell you what's likely to happen at accelerators or some parts…

— Edward Witten