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twistor
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Which do you think are the most promising alternatives?
twistor said:Dera Marcus,
As far as I'm concerned, the Amplituhedron is based on twistor theory. Are you suggesting, then, that LQG is related anyway with the Amplituhedron?
twistor said:As far as I'm concerned, the Amplituhedron is based on twistor theory. Are you suggesting, then, that LQG is related anyway with the Amplituhedron?
marcus said:YIKES! No! Because I don't know enough about that to say anything sensible about a relationship
twistor said:Which do you think are the most promising alternatives?
marcus said:So does Twistor Theory include all manner of quantum theories of gravity and matter that are formulated using twistors?
That's apples and oranges.twistor said:Which do you think are the most promising alternatives?
Carlo Rovelli said::
In conclusion, I (Rovelli) believe that string theory and loop quantum gravity do represent real progress. With respect to few years ago, we now do better understand what may cause black hole entropy, and what a quantized spacetime might be.
However, in my opinion it is a serious mistake to claim that this is knowledge we have acquired about nature.
Contrary to what is too often claimed even to the large public, perhaps with damage to the credibility of the entire theoretical community, these are only very tentative theories, without, so far, a single piece of experiment support.
For what we really know, they could be right or entirely wrong. What we really know at the fundamental
physical level is only the standard model and general relativity, which, within their domains of validity have
received continuous and spectacular experimental corroboration, month after month, in the last decades. The rest is, for the moment, tentative and speculative searching.
But is worthwhile, beautiful, fascinating searching, which might lead us to the next level of understanding
nature.
twistor said:Dera Marcus,
As far as I'm concerned, the Amplituhedron is based on twistor theory. Are you suggesting, then, that LQG is related anyway with the Amplituhedron?
Note that transitive relations are not the only kind of relations:marcus said:YIKES! No!
Good point! So far "twistor theory" has not been defined in this discussion, so talking about it as if it were a physical theory of nature verges on nonsense. However twistor FORMALISM, the mathematical language of twistors, is well defined.Demystifier said:Note that transitive relations are not the only kind of relations:
http://en.wikipedia.org/wiki/Transitive_relation
marcus said:Thanks for pointing out the ludicrousness, Demy.
twistor said:Please note that, though refuting an argument is fine (in fact, I didn't argue that the Amplituhedron and LQG are related, but asked if you were suggesting that), referring to it as ludicrous isn't. We're here to discuss about physics and enrich our understanding of it, not to discriminate others' arguments, simply by saying they are ludicrous :shy:. I wish that in the future we will debate respectfully, without hurting the feelings of other members of the furum.:thumbs:
Kind regards,
Twistor
String theory and loop quantum gravity are two competing theories that attempt to reconcile quantum mechanics with general relativity. The main difference between them lies in their approach to understanding the fundamental building blocks of the universe. String theory proposes that the universe is made up of tiny, one-dimensional strings that vibrate at different frequencies, while loop quantum gravity suggests that space is made up of discrete, indivisible units called 'loops'. Additionally, string theory attempts to unify all the fundamental forces of nature, while loop quantum gravity focuses primarily on gravity.
String theory and loop quantum gravity are considered alternatives because they have not yet been experimentally proven or disproven, and they have fundamental differences in their approaches to understanding the universe. They also have different predictions for physical phenomena, such as the behavior of particles at extremely high energies. Some scientists believe that these two theories may eventually be reconciled, while others argue that only one of them can be the true description of the universe.
One potential advantage of loop quantum gravity is that it does not require the existence of extra dimensions, which are a crucial component of string theory. This makes loop quantum gravity more testable and may make it easier to experimentally validate or disprove. Additionally, loop quantum gravity has the potential to provide a more complete understanding of the behavior of gravity at the quantum level, as it is specifically designed to incorporate general relativity into its framework.
At this time, there are no experiments or observations that definitively support loop quantum gravity over string theory. Both theories are still in the early stages of development and require further testing and refinement. However, some scientists argue that loop quantum gravity has the potential to provide predictions that are more testable and may eventually be able to make more accurate predictions about the behavior of the universe at the smallest scales.
Many scientists are currently working on ways to combine or integrate string theory and loop quantum gravity. Some proposed theories, such as string field theory, attempt to incorporate elements of both theories into a unified framework. However, at this time, there is no definitive way to combine these two theories, and it remains an active area of research in theoretical physics.