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Edward Witten Quotes
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Edward Witten
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On the other hand, we don't understand the theory too completely, and because of this fuzziness of spacetime, the very concept of spacetime and spacetime dimensions isn't precisely defined.
hand
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precisely
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understand
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concept
Edward Witten
1
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.
theory
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happen
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parts
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string
Edward Witten
3
The theory has to be interpreted that extra dimensions beyond the ordinary four dimensions the three spatial dimensions plus time are sufficiently small that they haven't been observed yet.
ordinary
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spatial
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three
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sufficiently
Edward Witten
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Spreading out the particle into a string is a step in the direction of making everything we're familiar with fuzzy. You enter a completely new world where things aren't at all what you're used to.
completely
,
fuzzy
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direction
,
particle
Edward Witten
1
String theory is an attempt at a deeper description of nature by thinking of an elementary particle not as a little point but as a little loop of vibrating string.
point
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loop
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particle
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string
Edward Witten
2
Regardless of any deviations, it was clear I was supposed to end up in math and physics.
deviations
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supposed
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clear
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physics
Edward Witten
1
It's indeed surprising that replacing the elementary particle with a string leads to such a big change in things. I'm tempted to say that it has to do with the fuzziness it introduces.
leads
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replacing
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surprising
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elementary
Edward Witten
2
It's an exaggeration to say that I came up with M-theory.
theory
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came
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exaggeration
Edward Witten
1
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.
general
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stretch
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break
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bend
Edward Witten
1
If you are a researcher, you are trying to figure out what the question is as well as what the answer is.
well
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researcher
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answer
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figure
Edward Witten
1
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.
along
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theory
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ability
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benefit
Edward Witten
2
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.
ways
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vibrate
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experimental
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discovered
Edward Witten
1
Quantum mechanics brought an unexpected fuzziness into physics because of quantum uncertainty, the Heisenberg uncertainty principle.
uncertainty
,
mechanics
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unexpected
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fuzziness
Edward Witten
2
I wouldn't have thought that a wrong theory should lead us to understand better the ordinary quantum field theories or to have new insights about the quantum states of black holes.
quantum
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better
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wouldn
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states
Edward Witten
6
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.
describe
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those
,
having
,
many
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