Unfortunately as a lay-person I think that modern physics has grown to complicated that I have no basis for really judging who is right or wrong in an argument like this. Wolf's article seems more persuasive, but that doesn't mean that he's right.
I actually think it was bordering on generous to the Quantum article, and I'm not sure that in a similar position I would have been satisfied with only restrained mockery.
Woit makes very negative comments about Cole, but my impression was he has the same basic view about the status of string theory as the one expressed in the article. Could someone explain how they are different?
A few comments as someone who works on the periphery of this field:
1. I started my PhD doing quantum information. People in quantum information spend a lot of time thinking about properties of entanglement. Someone below mentioned "a lack of new ideas". There have been quite a few important ideas in AdS/CFT (as a subset of string theory) over the past decade. One of the most exciting is called the Ryu-Takayanagi conjecture and it relates the amount of entanglement in a subsystem to the area of a minimal surface bounding said subregion.
2. Again, as someone who started purely as a QI person, it's shocking how much of the MATH of string theory has entered my research.
3. In my opinion, it's true that string theory hasn't made much progress over the past 20 years or so towards elucidating its potential role as a theory of quantum gravity; but in parallel there are amazing connections being made between string theory and quantum information. Look at the work being done by the "It from Qubit" collaboration for a sampling. This latter point is ~equally related to the recent decoherence of string theory as a subdiscipline. It's more like it tunneled to a state closer to QI.
4. The Firewall paradox is fascinating and it was originated by a bunch of string theorists (Almheiri, Marolf, Polchinski and Sully.)
5. Supersymmetry is in a corner; which is bad for string theory. But string theory is proving to be a powerful lens through which to study quantum entanglement. One step back, one step forward?
Anyways, saying that "string theory is our savior" or anything like that is bad etiquette. But the community is doing interesting things today.
I'm curious, do you have an opinion about Stephen Wolfram's idea of graph/knot theory being the underlying principle of reality? To me, it seems much more ontologically acceptable than string theory and many-worlds interpretations of quantum mechanics. I remain unconvinced that pilot-wave-like non-local, hidden-variables interpretations are flawed; they certainly seem the most ontologically tractable. From that perspective, a graph/knot basis for the explicitly non-local hidden-variables theories seems like a reasonable solution to the ultimate basis of physics.
In the case of 1), the string theoretic tools, including AdS/CFT appear to be more effective in condensed matter physics than in their originally-intended use.
I've been glad to see the emergence of the Grassmannian/'amplituhedron' ideas, as they're different, and different would appear to be good.
Silverstein is fairly new, but yeah I really hope that young people are wise enough not to join. The masters are for the most part way past their glory days and super symmetry all but dead.
"Really good science writers need to lie, cheat, and steal, said K. C. Cole in the first plenary of the workshop. She outlined 15 rules for writing in her talk, but focused most on the value of lying."
As a layman I got the impression the issue was essentially settled with the AdS/CFT correspondence - string theory is equivalent to quantum field theory. Just in the same way one can convert a boolean satisfiable problem into a graph coloring problem or a Sudoku puzzle or any other NP-complete problem. Different representations and ways of looking at the same thing.
The details of the correspondence are currently only known for (toy) theories not describing the actual physics of our universe and it is a matter of debate whether it is possible to extend the correspondence to realistic models but nonetheless those are just two different ways of describing the same thing.
I am not sure whether the correspondence has anything to say about what point of view is more fundamental - are both really equivalent or just in some limit, i.e. does string theory for example survive for very high energies while quantum field theory breaks down implying that there are really tiny strings while fields and particles are just a very good approximation?
This latest book by R. Penrose might be of interest to those looking for a serious analysis of what is happening to the theoretical physics research today: http://press.princeton.edu/titles/10664.html.
Cannot recommend Penrose highly enough ... a truly brilliant mathematical physicist who is not afraid to call out Emperor's new clothes as it were (which of course is an indirect reference to another of his books about AI and consciousness). "Road to Reality" also gets my vote as "here's the utility belt you need to really get a handle on modern physics".
For those who do not care about paradigms and use the Solomonoff induction (Occam's razor) and falsification as a guiding principle:
After carefully checking basic assumptions made long ago against newer research, als well as using a different interpretation of the measured effect - you can build up a fully deterministic and logical model compatible with GR, SR while also explaining quantum mechanical effects and cosmology.
I take falsification very seriously - if there are multiple unexplainable phenomena or different measurements contradicting a theory, it's of the table for me and I don't care if the rest of the world still believes in it. History has shown that theories die slowly despite contradictory evidence. Secondly, nature does not care about the artificial borders in science we humans create - there is exactly zero difference between quantum mechanical world, chemistry, classical physical objects and cosmology - there is only physics. Every proposed theory must also be paradox free - paradoxes should make your internal alarm ring that something is wrong and should never be ignored.
Now the fun fact: We already have a unified theory that only requires the most minimal and logical assumptions you can possible do. But as it breaks many beloved paradigms and is obviously not a weekend read as every complete physical model is at least very complex - it is not even discussed in contemporary physics. The name of the model is:
"Basic Structures of Matter - Supergravitation Unified Theory" by Dr. Stoyan Sarg.
There are some papers about this theory, but I have to say, when I started with them, I did not really understand it well from them. I got some raw picture, but no real understand of the model - the large book is the only source for this model - unfortunately.
When I explain this model these days, I usually take a different order and explain many parts of Chapter 12 right at the beginning.
How those fundamental particles crystallize into higher structures that later build up protons/neutrons/electrons/... is one of the most beautiful processes I have ever understood and actually so simple once understood. So I usually start there now and then explain the CL space, electrons, protons/neutrons and then some chemical topics.
My perspective changed quite dramatically while understanding this model. The world is now so much more complex and much much deeper then the standard model. In fact, the standard model and even quantum electrodynamics now look like very rough approximations.
To give you a perspective, a electron has easily 2.44e+19 fundamental particles with very complex arrangement (the very exact number unknown due some missing facts not yet determinable. There is a partially finite recursive process involved those depth is not clear yet, only the minimum depth is clear.
I asked many scientists about this theory, my old physics professors, famous ones, local ones - also those who clearly state that something in our current understand must be wrong. Sad truth is, they either don't know the model or simply don't care.
So far, I have not found anything wrong with this model. Apart from the many typos and sometimes a index error that you can easily spot, I only stumbled upon one equation so far that I don't understand or is wrong - can't say yet. But this would in the worst case, only change the distances between two neutrons in tritium and that can't cause larger problems with the model itself.
For those open minded people that have a deep interest in a true revolutionary model, read this book. If I could only have one book, that's the one I will pick ;)
[+] [-] subnaught|9 years ago|reply
[+] [-] tinym|9 years ago|reply
[+] [-] neaden|9 years ago|reply
[+] [-] M_Grey|9 years ago|reply
[+] [-] woodandsteel|9 years ago|reply
Woit makes very negative comments about Cole, but my impression was he has the same basic view about the status of string theory as the one expressed in the article. Could someone explain how they are different?
[+] [-] blackholesRhot|9 years ago|reply
1. I started my PhD doing quantum information. People in quantum information spend a lot of time thinking about properties of entanglement. Someone below mentioned "a lack of new ideas". There have been quite a few important ideas in AdS/CFT (as a subset of string theory) over the past decade. One of the most exciting is called the Ryu-Takayanagi conjecture and it relates the amount of entanglement in a subsystem to the area of a minimal surface bounding said subregion.
2. Again, as someone who started purely as a QI person, it's shocking how much of the MATH of string theory has entered my research.
3. In my opinion, it's true that string theory hasn't made much progress over the past 20 years or so towards elucidating its potential role as a theory of quantum gravity; but in parallel there are amazing connections being made between string theory and quantum information. Look at the work being done by the "It from Qubit" collaboration for a sampling. This latter point is ~equally related to the recent decoherence of string theory as a subdiscipline. It's more like it tunneled to a state closer to QI.
4. The Firewall paradox is fascinating and it was originated by a bunch of string theorists (Almheiri, Marolf, Polchinski and Sully.)
5. Supersymmetry is in a corner; which is bad for string theory. But string theory is proving to be a powerful lens through which to study quantum entanglement. One step back, one step forward?
Anyways, saying that "string theory is our savior" or anything like that is bad etiquette. But the community is doing interesting things today.
[+] [-] smaddox|9 years ago|reply
[+] [-] platz|9 years ago|reply
[+] [-] arcanus|9 years ago|reply
1) All the string people are saying they are applying strings to different fields. That means funding is drying up.
2) No new blood: they are quoting all the same people as 10 years ago. No breakthroughs since Maldacena, it sounds like.
[+] [-] ISL|9 years ago|reply
I've been glad to see the emergence of the Grassmannian/'amplituhedron' ideas, as they're different, and different would appear to be good.
[+] [-] orbifold|9 years ago|reply
[+] [-] auntienomen|9 years ago|reply
[+] [-] M_Grey|9 years ago|reply
https://web.archive.org/web/20061002142756/http://www.ncswa....
"Really good science writers need to lie, cheat, and steal, said K. C. Cole in the first plenary of the workshop. She outlined 15 rules for writing in her talk, but focused most on the value of lying."
[+] [-] danbruc|9 years ago|reply
The details of the correspondence are currently only known for (toy) theories not describing the actual physics of our universe and it is a matter of debate whether it is possible to extend the correspondence to realistic models but nonetheless those are just two different ways of describing the same thing.
I am not sure whether the correspondence has anything to say about what point of view is more fundamental - are both really equivalent or just in some limit, i.e. does string theory for example survive for very high energies while quantum field theory breaks down implying that there are really tiny strings while fields and particles are just a very good approximation?
[+] [-] Koshkin|9 years ago|reply
[+] [-] alanlit|9 years ago|reply
Cannot recommend Penrose highly enough ... a truly brilliant mathematical physicist who is not afraid to call out Emperor's new clothes as it were (which of course is an indirect reference to another of his books about AI and consciousness). "Road to Reality" also gets my vote as "here's the utility belt you need to really get a handle on modern physics".
Good stuff.
[+] [-] sfrailsdev|9 years ago|reply
[+] [-] ymerej|9 years ago|reply
[+] [-] poelzi|9 years ago|reply
After carefully checking basic assumptions made long ago against newer research, als well as using a different interpretation of the measured effect - you can build up a fully deterministic and logical model compatible with GR, SR while also explaining quantum mechanical effects and cosmology.
I take falsification very seriously - if there are multiple unexplainable phenomena or different measurements contradicting a theory, it's of the table for me and I don't care if the rest of the world still believes in it. History has shown that theories die slowly despite contradictory evidence. Secondly, nature does not care about the artificial borders in science we humans create - there is exactly zero difference between quantum mechanical world, chemistry, classical physical objects and cosmology - there is only physics. Every proposed theory must also be paradox free - paradoxes should make your internal alarm ring that something is wrong and should never be ignored.
Now the fun fact: We already have a unified theory that only requires the most minimal and logical assumptions you can possible do. But as it breaks many beloved paradigms and is obviously not a weekend read as every complete physical model is at least very complex - it is not even discussed in contemporary physics. The name of the model is: "Basic Structures of Matter - Supergravitation Unified Theory" by Dr. Stoyan Sarg.
https://www.amazon.com/Basic-Structures-Matter-Supergravitat...
There are some papers about this theory, but I have to say, when I started with them, I did not really understand it well from them. I got some raw picture, but no real understand of the model - the large book is the only source for this model - unfortunately.
When I explain this model these days, I usually take a different order and explain many parts of Chapter 12 right at the beginning. How those fundamental particles crystallize into higher structures that later build up protons/neutrons/electrons/... is one of the most beautiful processes I have ever understood and actually so simple once understood. So I usually start there now and then explain the CL space, electrons, protons/neutrons and then some chemical topics.
My perspective changed quite dramatically while understanding this model. The world is now so much more complex and much much deeper then the standard model. In fact, the standard model and even quantum electrodynamics now look like very rough approximations. To give you a perspective, a electron has easily 2.44e+19 fundamental particles with very complex arrangement (the very exact number unknown due some missing facts not yet determinable. There is a partially finite recursive process involved those depth is not clear yet, only the minimum depth is clear.
I asked many scientists about this theory, my old physics professors, famous ones, local ones - also those who clearly state that something in our current understand must be wrong. Sad truth is, they either don't know the model or simply don't care.
So far, I have not found anything wrong with this model. Apart from the many typos and sometimes a index error that you can easily spot, I only stumbled upon one equation so far that I don't understand or is wrong - can't say yet. But this would in the worst case, only change the distances between two neutrons in tritium and that can't cause larger problems with the model itself.
For those open minded people that have a deep interest in a true revolutionary model, read this book. If I could only have one book, that's the one I will pick ;)
[+] [-] anders098|9 years ago|reply