- #1
Viet Tu
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Are there anything new in String theory?
What is status of String Theory now?
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In summary, there are recent developments and progress in String Theory, which is a set of different theories that make sense mathematically. However, there is no evidence to support its validity and experimental testing is currently impossible due to extreme conditions required. Some interesting connections have been found between quantum information theory and gravity, suggesting that spacetime geometry is related to the entanglement structure of underlying quantum systems. There is also a potential relationship between the final theory and Godel's incompleteness theorem, with some scientists, like Stephen Hawking, questioning the existence of a final theory altogether.
- #2
berkeman
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Viet Tu said:
Welcome to the PF.
Yes. Scientists are hard at work on String Theory.
http://www.catster.com/wp-content/uploads/2015/06/cat_with_string.jpg
For more information, do a Google search and post links in the General Physics forum with your specific questions about String Theory. Or, post in the General Discussion forum in the Kitten thread, whichever is most applicable...
<< Mentor Note -- thread moved to the general technical physics forums >>
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- #3
Viet Tu
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Thank you.
Apologize for my mistake.
Apologize for my mistake.
- #4
hsdrop
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May we all look at the universe the same way a kitten looks at a ball of string.
With wide eyed wonder, amazement, curiosity and, just a touch of psychotic playfulness.
With wide eyed wonder, amazement, curiosity and, just a touch of psychotic playfulness.
- #5
rootone
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There still is not any evidence that what is proposed by string theory is true, so no change there.
String theory though is a actualy a set of diffrrent theories, which make very good sense mathematically, but it ends there.
There is 'M' theory which attempts to unite the various string models, which is nice, but still, so what?, unless something is predicated and found to be true.
String theory though is a actualy a set of diffrrent theories, which make very good sense mathematically, but it ends there.
There is 'M' theory which attempts to unite the various string models, which is nice, but still, so what?, unless something is predicated and found to be true.
- #6
sophiecentaur
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No experiments have been done yet, to test it, because they would require such extreme and unattainable (as yet) conditions.rootone said:
- #7
atyy
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Yes, there is progress in string theory. Many of the most interesting developments are summarized in these lectures by Mark Van Raamsdonk.
https://arxiv.org/abs/1609.00026
Lectures on Gravity and Entanglement
Mark Van Raamsdonk
(Submitted on 31 Aug 2016)
The AdS/CFT correspondence provides quantum theories of gravity in which spacetime and gravitational physics emerge from ordinary non-gravitational quantum systems with many degrees of freedom. Recent work in this context has uncovered fascinating connections between quantum information theory and quantum gravity, suggesting that spacetime geometry is directly related to the entanglement structure of the underlying quantum mechanical degrees of freedom and that aspects of spacetime dynamics (gravitation) can be understood from basic quantum information theoretic constraints. In these notes, we provide an elementary introduction to these developments, suitable for readers with some background in general relativity and quantum field theory. The notes are based on lectures given at the CERN Spring School 2014, the Jerusalem Winter School 2014, the TASI Summer School 2015, and the Trieste Spring School 2015.
https://arxiv.org/abs/1609.00026
Lectures on Gravity and Entanglement
Mark Van Raamsdonk
(Submitted on 31 Aug 2016)
The AdS/CFT correspondence provides quantum theories of gravity in which spacetime and gravitational physics emerge from ordinary non-gravitational quantum systems with many degrees of freedom. Recent work in this context has uncovered fascinating connections between quantum information theory and quantum gravity, suggesting that spacetime geometry is directly related to the entanglement structure of the underlying quantum mechanical degrees of freedom and that aspects of spacetime dynamics (gravitation) can be understood from basic quantum information theoretic constraints. In these notes, we provide an elementary introduction to these developments, suitable for readers with some background in general relativity and quantum field theory. The notes are based on lectures given at the CERN Spring School 2014, the Jerusalem Winter School 2014, the TASI Summer School 2015, and the Trieste Spring School 2015.
- #8
Viet Tu
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Is there any relationship between final theory and incompleteness theorem, according to Godel’s theorem. Even Stephen Hawing once said that there may not a final theory to discover after all?