Edward Witten Quotes

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I don't care about movies. I tend to play badminton once a week.
Edward Witten Quotes: I don't care about movies.
We know a lot of things, but what we don't know is a lot more.
Edward Witten Quotes: We know a lot of
Most people who haven't been trained in physics probably think of what physicists do as a question of incredibly complicated calculations, but that's not really the essence of it. The essence of it is that physics is about concepts, wanting to understand the concepts, the principles by which the world works.
Edward Witten Quotes: Most people who haven't been
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 ability of string theory to describe all the elementary particles and their forces along with gravity depends on using the extra dimensions.
Edward Witten Quotes: Technically you need the extra
One very important aspect of string theory is definitely testable. That was the prediction of supersymmetry, which emerged from string theory in the early '70s.
Edward Witten Quotes: One very important aspect of
I'm actually, for the most part, a complete agnostic politically.
Edward Witten Quotes: I'm actually, for the most
I just think too many nice things have happened in string theory for it to be all wrong. Humans do not understand it very well, but I just don't believe there is a big cosmic conspiracy that created this incredible thing that has nothing to do with the real world.
Edward Witten Quotes: I just think too many
We have one real candidate for changing the rules; this is string theory. In string theory the one-dimensional trajectory of a particle in spacetime is replaced by a two-dimensional orbit of a string. Such strings can be of any size, but under ordinary circumstances they are quite tiny, ... a value determined by comparing the predictions of the theory for Newton's constant and the fine structure constant to experimental values.
Edward Witten Quotes: We have one real candidate
Even before string theory, especially as physics developed in the 20th century, it turned out that the equations that really work in describing nature with the most generality and the greatest simplicity are very elegant and subtle.
Edward Witten Quotes: Even before string theory, especially
The hardest part of research is always to find a question that's big enough that it's worth answering, but little enough that you actually can answer it.
Edward Witten Quotes: The hardest part of research
There was a long history of speculation that in quantum gravity, unlike Einstein's classical theory, it might be possible for the topology of spacetime to change.
Edward Witten Quotes: There was a long history
It's an exaggeration to say that I came up with M-theory.
Edward Witten Quotes: It's an exaggeration to say
You have that one basic string, but it can vibrate in many ways. But we're trying to get a lot of particles because experimental physicists have discovered a lot of particles.
Edward Witten Quotes: You have that one basic
In Einstein's general relativity the structure of space can change but not its topology. Topology is the property of something that doesn't change when you bend it or stretch it as long as you don't break anything.
Edward Witten Quotes: In Einstein's general relativity the
One of the basic things about a string is that it can vibrate in many different shapes or forms, which gives music its beauty.
Edward Witten Quotes: One of the basic things
As of now, string theorists have no explanation of why there are three large dimensions as well as time, and the other dimensions are microscopic. Proposals about that have been all over the map.
Edward Witten Quotes: As of now, string theorists
If you are a researcher, you are trying to figure out what the question is as well as what the answer is.
Edward Witten Quotes: If you are a researcher,
As far as extra dimensions are concerned, very tiny extra dimensions wouldn't be perceived in everyday life, just as atoms aren't: we see many atoms together but we don't see atoms individually.
Edward Witten Quotes: As far as extra dimensions
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 of the theory that are likely to be tested.
Edward Witten Quotes: So when you ask me
Quantum mechanics brought an unexpected fuzziness into physics because of quantum uncertainty, the Heisenberg uncertainty principle.
Edward Witten Quotes: Quantum mechanics brought an unexpected
Having those extra dimensions and therefore many ways the string can vibrate in many different directions turns out to be the key to being able to describe all the particles that we see.
Edward Witten Quotes: Having those extra dimensions and
String theory is 21 st century physics that fell accidentally into the 20th century.
Edward Witten Quotes: String theory is 21 st
But the beauty of Einstein's equations, for example, is just as real to anyone who's experienced it as the beauty of music. We've learned in the 20th century that the equations that work have inner harmony.
Edward Witten Quotes: But the beauty of Einstein's
There is a difference between knowing what is true and knowing why it is true
Edward Witten Quotes: There is a difference between
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