3 ms·

> theoretical physics is dead I'm genuinely not sure why you believe this especially as we live in an era when theoretical physics and experimental physics are

> theoretical physics is dead I'm genuinely not sure why you believe this especially as we live in an era when theoretical physics and experimental physics are becoming so entwined and the product is a fairly successful testing of our models of physics.

gfodor 7y ago
I believe it because it seems to be the consensus I gather whenever I read articles about theoretical physics' hunt for the unified theory. I'm talking about that problem specifically. The search for the unified theory sounds basically dead, and we have a generation of physicists who have spent their careers going down dead ends. The meme seems to be for the field to move past it and focus on more "productive" areas of physics that can have practical use. I can only gather this from 2nd hand accounts in pop-sci articles and mainstream physics books, but the lack of falsifiability and experimentalism for these things, combined with a large surface area of failed attempts, seems to have left physics in a rut.
- codethief 7y ago
  Sure, theoretical high-energy physics (i.e. particle physics) seems to be in somewhat of a dead end when it comes to finding a theory of everything. But this is an incredibly small part of theoretical physics.
meowface 7y ago
It's not dead in the sense that we've done a better job of experimentally confirming things like general relativity and aspects of quantum mechanics, due to being able to accurately perform more precise observations (like with LHC and LIGO). I'd say this is a triumph of advances in experimental physics, though, rather than theoretical physics. There doesn't seem to have been any widely accepted fundamental theoretical breakthrough like general relativity or quantum mechanics for a long time, nor has there been any widely accepted way to unify the two theories. Maybe I'm wrong, but that's the impression I and many others have.
- DubiousPusher 7y ago
  This is pure speculation on my part so take it for a grain of salt. But I generally don't find that fields just stop advancing or go cold. It seems to me that usually what is happening is there is a lot of work going on at a level that does not make a lot of sense to report to a lay audience or at leas the media which covers the subject does not think a lay audience could understand or would be interested in it. Co Sider biology. What is the last major biology idea that made a huge public splsh? DNA? The human genome sequence? But are biologists stuck the world round? Of course not there have been hundreds if not thousands of notable biology findings in the past 20 years. Theoretical physics probably simply appears stuck to us because as lay people we focus on a couple of large scale questions that for now are probably out of reach. But we don't consider the hundreds of theoretical physics refinements and observations that need to go into the development of the LHC or LIGO or James Webb etc. Anyway, that's just like my opinion man.
  - meowface 7y ago
    True, there probably have been some important refinements, but part of the issue is that a lot of that work has been done along very long, sometimes many-decades long, paths that so far have had zero experimental validation. Basically, people have been building giant ladders and constantly improving them, but we don't know if any of the ladders were put up against the right wall. We have no idea if these theories actually correspond to reality or not. For example, string theory and supersymmetry. The LHC was created partly with the goal and expectation of detecting particles that would validate supersymmetry, but so far it hasn't, and many are beginning to believe the theory may be flawed or wrong. In some sense that is a bit of a theoretical advancement, but so far, supersymmetry theorists don't appear to have a popular alternative they're considering instead. If they fail to find evidence for it in the next 10 or so years, it's probably just a total dead end. And string theory has been at it for even longer.
  - avaldeso 7y ago
    > Co Sider biology. What is the last major biology idea that made a huge public splsh? DNA? The human genome sequence? But are biologists stuck the world round? Of course not there have been hundreds if not thousands of notable biology findings in the past 20 years. Human genome editing using CRISPR-Cas9 a few years ago was pretty big tbh. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4417674 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4417674

gfodor 7y ago

I believe it because it seems to be the consensus I gather whenever I read articles about theoretical physics' hunt for the unified theory. I'm talking about that problem specifically. The search for the unified theory sounds basically dead, and we have a generation of physicists who have spent their careers going down dead ends. The meme seems to be for the field to move past it and focus on more "productive" areas of physics that can have practical use. I can only gather this from 2nd hand accounts in pop-sci articles and mainstream physics books, but the lack of falsifiability and experimentalism for these things, combined with a large surface area of failed attempts, seems to have left physics in a rut.

codethief 7y ago
Sure, theoretical high-energy physics (i.e. particle physics) seems to be in somewhat of a dead end when it comes to finding a theory of everything. But this is an incredibly small part of theoretical physics.

meowface 7y ago

It's not dead in the sense that we've done a better job of experimentally confirming things like general relativity and aspects of quantum mechanics, due to being able to accurately perform more precise observations (like with LHC and LIGO). I'd say this is a triumph of advances in experimental physics, though, rather than theoretical physics. There doesn't seem to have been any widely accepted fundamental theoretical breakthrough like general relativity or quantum mechanics for a long time, nor has there been any widely accepted way to unify the two theories. Maybe I'm wrong, but that's the impression I and many others have.

DubiousPusher 7y ago
This is pure speculation on my part so take it for a grain of salt. But I generally don't find that fields just stop advancing or go cold. It seems to me that usually what is happening is there is a lot of work going on at a level that does not make a lot of sense to report to a lay audience or at leas the media which covers the subject does not think a lay audience could understand or would be interested in it. Co Sider biology. What is the last major biology idea that made a huge public splsh? DNA? The human genome sequence? But are biologists stuck the world round? Of course not there have been hundreds if not thousands of notable biology findings in the past 20 years. Theoretical physics probably simply appears stuck to us because as lay people we focus on a couple of large scale questions that for now are probably out of reach. But we don't consider the hundreds of theoretical physics refinements and observations that need to go into the development of the LHC or LIGO or James Webb etc. Anyway, that's just like my opinion man.
- meowface 7y ago
  True, there probably have been some important refinements, but part of the issue is that a lot of that work has been done along very long, sometimes many-decades long, paths that so far have had zero experimental validation. Basically, people have been building giant ladders and constantly improving them, but we don't know if any of the ladders were put up against the right wall. We have no idea if these theories actually correspond to reality or not. For example, string theory and supersymmetry. The LHC was created partly with the goal and expectation of detecting particles that would validate supersymmetry, but so far it hasn't, and many are beginning to believe the theory may be flawed or wrong. In some sense that is a bit of a theoretical advancement, but so far, supersymmetry theorists don't appear to have a popular alternative they're considering instead. If they fail to find evidence for it in the next 10 or so years, it's probably just a total dead end. And string theory has been at it for even longer.
- avaldeso 7y ago
  > Co Sider biology. What is the last major biology idea that made a huge public splsh? DNA? The human genome sequence? But are biologists stuck the world round? Of course not there have been hundreds if not thousands of notable biology findings in the past 20 years. Human genome editing using CRISPR-Cas9 a few years ago was pretty big tbh. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4417674 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4417674