Skip to main content

Questions tagged [unified-theories]

The tag has no usage guidance.

Filter by
Sorted by
Tagged with
4 votes
1 answer
281 views

Why Dirac's spin-$\frac12$ theory proves wrong Kaluza-Klein theory?

I recently saw Sabine's short video that mentions that Dirac's spin-$\frac12$ theory proves wrong Kaluza-Klein theory unless supersymmetry is amended to the Kaluza-Klein. Is there a more detailed ...
Markoul11's user avatar
  • 4,170
0 votes
0 answers
46 views

Unification of Interactions

It has been asked before but with a different aim, and was answered mathematically, while I look for a practical understanding of it. If the Four Foundamental Forces were unified in the first instants ...
FringesExplorer's user avatar
0 votes
0 answers
44 views

Are there approaches to show that GR and QFT actually are unifable (without looking for a concrete ToE formalism)?

In mathematics, you can show that some problems are unprovable or have no solution at all and you also have the tool of proof by contradiciton, and similar. But is any of this also applied in physics ...
ldfjglfkgj's user avatar
-1 votes
1 answer
55 views

QED impact on Unified Field Theory [closed]

how did the development of quantum electrodynamics impact the development of modern unified field theories? and did any other theories have more significant impact?
Hannah 's user avatar
1 vote
0 answers
123 views

Question about $E_8$ symmetry breaking and hypercharge formula

Most $E_8$ gauge theories follow this breaking chain: $$E_8 \rightarrow E_6 \times SU(3)_{Gen}.$$ How does the $E_6 \times SU(3)$ group break down through $SO(10)$, the Pati-Salam Model or the Minimal ...
AdvilDuttay's user avatar
4 votes
0 answers
198 views

How does Garrett Lisi's $E_8$ Theory contain the Higgs Boson and Graviton?

How does Garrett Lisi's "Exceptionally Simple Theory of Everything" contain the Higgs Boson and Graviton? Let's say that $E_8$ breaks down like this: $$E_8 \rightarrow E_6 \times SU(3).$$ ...
AdvilDuttay's user avatar
7 votes
2 answers
1k views

New theory for unifying general relativity and quantum mechanics [closed]

The media is currently reporting on a new idea in theoretical physics, developed by the group of professor Jonathan Oppenheim, to unify general relativity with quantum theory. The novel idea is not to ...
M. Wind's user avatar
  • 743
-6 votes
1 answer
110 views

Was the Michelson & Morely experiment ever valid? [closed]

One of the key predecessors to Einstein's Relativity was another theory having to do with an "Aether" material. This substance was supposed to be the substrate that the universe is built ...
david.cowan's user avatar
1 vote
0 answers
39 views

Is there a "unification" explanation of why the mixed gauge-gravitational anomaly cancels in the standard model?

Quoting the Review of Particle Physics (93.2.3): all representations of SO(10) are anomaly free in four dimensions... the absence of anomalies in ... a SM generation can be viewed as deriving from ...
Mitchell Porter's user avatar
10 votes
3 answers
447 views

Is a QFT always an EFT coming from something deeper?

(I have already read this post but my question is different) Reading Ch. 12 of Weinberg's Quantum Field Theory Vol. 1, he states that all realistic (interacting) QFTs are now believed to be EFT of ...
LolloBoldo's user avatar
  • 1,611
3 votes
1 answer
237 views

What are the constraints on a quantum gravity theory? [duplicate]

My question is: what are the main constraints or challenges that prevent us from finding a consistent and complete theory of quantum gravity? Are they conceptual, mathematical, physical, or ...
Olandelie's user avatar
0 votes
1 answer
57 views

Limits to the complexity of a fundamental theory

There are examples in physics in which a simple law results from an immeasurably more complicated set of underlying interactions. Consider Hooke's law, for instance: there is a very simple equation ...
Marco Ocram's user avatar
  • 26.4k
-2 votes
1 answer
106 views

Is the quest for a theory unifying gravity and quantum mechanics just wishful thinking? [closed]

What is the basis of the believe that there should be a unified theory which simultaneously gives quantum physics (the regime small things moving very fast) and gravity (the regime of big things ...
dohmatob's user avatar
  • 193
1 vote
0 answers
86 views

Is the big bang (BB) correctly summarized as a sequence of symmetry-breaking events? [closed]

Please take this as a serious question from a curious yet deeply underinformed lover of this universe. This is more of a basic question concerning the overall mechanics of the transition stages from ...
blacktopshaman's user avatar
2 votes
0 answers
59 views

Could the low Higgs mass be relevant to the unification of the (weak) nuclear force and gravity?

I found in a paragraph in a research paper (although it was talking about something else) the statement: that it is possible to unite the weak nuclear force and gravity, but that requires that: Both ...
AhMeD's user avatar
  • 31
1 vote
1 answer
139 views

Could the particles of the standard model be states of a smaller set of particles?

The standard model describes the particle's initial zoo into a smaller set. If I am not wrong quarks were proposed as a solution even before being detected. Is there any reason why we could not ...
user avatar
-3 votes
2 answers
264 views

How do gravity and the quantum co-exist? [duplicate]

In my opinion, the biggest unsolved problem in fundamental physics is how gravity and the quantum will be made to coexist within the same theory. The problem is that quantum physics and general ...
Aryan Vyahalkar's user avatar
-1 votes
1 answer
102 views

How Existence Of Matter Is Possible Inside The Black Hole? [closed]

According to Chronology of the universe, origin of the universe initiated as per below sequence: Big bang (at 0 sec) occurs in the black hole (10^-35 m in size, Planck Length) at the center of the ...
Satyajit Patidar's user avatar
1 vote
0 answers
35 views

Which unification theories would require WEP violation?

I was just reading this article about how the weak equivalence principle was recently confirmed up to one part in $10^{15}$, for two metal alloys orbiting Earth. Are there theories that expect the WEP ...
Adam Herbst's user avatar
  • 2,475
1 vote
1 answer
106 views

Is String Theory actually the supreme theory of Physics that can unite the 'Theory of the Big' and the 'Theory of the Small'? [duplicate]

As Dr. Michio Kaku says, that in the current state of Physics, we have the 'Theory of the Big' that is black holes, the Big Bang, cosmology, astrophysics on one hand and the 'Theory of the Small' that ...
user avatar
1 vote
1 answer
67 views

What are the differences between electroweak interactions before and after unification?

I am very confused by this point, although its mathematical description is not hard. I still cannot see how these two theories are "unified", which term in lagrangian indicates this ...
Sven2009's user avatar
  • 995
3 votes
2 answers
282 views

What order did the particles of nature appear in?

in the epochs of the very early universe, the different forces separated from each other in succession. if this is true then at one point there was an electroweak force. and before that, there was the ...
blacktopshaman's user avatar
0 votes
2 answers
77 views

What is the shortest form way to fully describe the way our universse functions? [closed]

Let's say we wanted to explain to some alien living in another universe with different laws of physics to how our universe worked, what is the shortest way of doing this? A different way of looking at ...
Jack's user avatar
  • 535
3 votes
2 answers
215 views

Are mass and charge manifistations of the same thing?

Even though mass and charge are two different physical properties of matter, have there been any attempts at unifying them? say, by defining a physical property of matter such that mass and charge are ...
Tachyon's user avatar
  • 633
-6 votes
1 answer
115 views

Experiments and theory [closed]

Sometimes when the data from experiments disagree with a theory which was supposed to describe the experiment we say: "This theory works well for some range of variables but there are some ...
Jun Seo-He's user avatar
-7 votes
1 answer
142 views

Is a unified theory encompassing all types of physics possible? [closed]

According to the cGh cube, a theory of everything should incorporate quantum mechanics, relativity and gravity. It should also include the other 3 forces to be unified to a single force. However, how ...
AdvilDuttay's user avatar
1 vote
1 answer
134 views

Would there be a force carrier particle in the unified field theory?

So from what I understand, each fundamental force (with the exception of gravity unless you count the hypothetical graviton) has a force carrier particle that mediates the force. Does that mean if the ...
H. M's user avatar
  • 49
5 votes
2 answers
765 views

What does it mean to take GR and QM "together"?

From the "Theory of Everything" Wikipedia article (first paragraph): Over the past few centuries, two theoretical frameworks have been developed that, together, most closely resemble a TOE. ...
Sasha's user avatar
  • 53
1 vote
2 answers
80 views

What Data Set(s) Would Be Best For Head-To-Head Unified Field Theory Model Selection?

I'm seriously considering establishing a prize for unified field theories in-line with my history of prize awards, such as the fusion legislation I drafted with a cofoudner of the AEC's program, the ...
James Bowery's user avatar
  • 1,357
1 vote
1 answer
113 views

Does Bohr's solution to Einstein's Light-box experiment work without gravity?

[PS: Not a science student beyond high school] Hi, I was reading a book on the debates surrounding interpretations of quantum mechanics (link) and it discussed how the solution to Einstein's Light-box ...
Leafy's user avatar
  • 113
1 vote
1 answer
83 views

Physical principles and their rigidity

In many of his talks and interviews, Nima Arkani-Hamed mentions how incredibly constrained are the laws of physics. For example, in a recent interview he says: “[I]f we just took these general ...
0 votes
1 answer
202 views

Why did the fundamental forces of nature break symmetry in the order they did?

First gravity broke loose, then the strong force and finally there was the separation of the weak and the electromagnetic force? Is this a logical sequence? I guess it has to do with temperature/...
Veronica Noordzee's user avatar
3 votes
2 answers
162 views

Uncertainty of the past

If the future today can be described as a complex set of probabilistic wave functions which collapse to form our reality, is it possible that the past history of the universe could also be ...
Joseph Hirsch's user avatar
1 vote
4 answers
216 views

Why do we believe in symmetry being a unifying principle in elementary particle physics?

As far as I can see, symmetry is something that is preferred at lower temperature. For example a crystal lattice has discrete translational symmetries at $T=0$, but at $T>0$ this symmetry is not ...
oliver's user avatar
  • 7,504
1 vote
1 answer
3k views

What is Eric Weinstein's Geometric Unity theory? [closed]

I can usually follow the basic ideas of a theory, but Weinstein's Geometric Unity theory is completely incomprehensible to me. It leads me to suspect that it is high level crackpottery, but he seems ...
user avatar
0 votes
0 answers
78 views

Assumed form for beta function

In a classical paper on Hierarchy of Interactions in Unified Gauge Theories, Georgi et al define the renormalization group equation $$ \mu \frac{\partial g(\mu)}{\partial \mu } =\beta(g(\mu)). $$ He ...
GaloisFan's user avatar
  • 1,742
0 votes
2 answers
186 views

Particle fields and field theory

All particles have their own fields. More precisely, I've learned that an electron is just a bundle-up packet of energy from an 'electron field'. So as in this sense, all particles (from the standard ...
Ruchi's user avatar
  • 453
1 vote
0 answers
70 views

What did Einstein's unified theory look like, quantitatively?

I'm writing an essay on the history of physics from a mathematical point of view. It's divided into a handful of impactful persons/ideas, one of the largest being the works of Einstein. Immediately ...
10GeV's user avatar
  • 799
1 vote
1 answer
148 views

Meaning of "unification of interactions"

What do we exactly mean when we speak about "unification of two interactions" or say "the electromagnetic and weak interactions are unified"? Wikipedia states that: the ...
Antonio19932806's user avatar
5 votes
1 answer
642 views

What is the mechanism that causes forces to get unified at high energies?

There are a lot of questions and answers on this site about the unification of forces, and all of them univocally say that at high energy levels, all the forces get unified. But none of them answer my ...
Árpád Szendrei's user avatar
0 votes
1 answer
130 views

Why did Kaluza-Klein need an additional dimension? [closed]

Why did Kaluza-Klein need an additional dimension and not just treat the fourth dimension as a description of both time and space? Assume that you can exchange the time dimension to a space dimension ...
W.E.'s user avatar
  • 61
2 votes
0 answers
67 views

What is a simple QFT calculation that could show that some theory of Quantum Gravity might be correct? [closed]

Imagine that we could do QFT calculations with a Hamiltonian that takes GR into account. What is a relatively simple calculation that could show that this theory is more accurate than a "normal&...
Quanta's user avatar
  • 631
1 vote
1 answer
132 views

Is the fundamental relationship between electromagnetism & gravity unknown?

Richard Feynman made the following statement: the relationship between the gravity forces and electrical forces remains unknown in the interview linked here. In context, he made this statement ...
StayOnTarget's user avatar
1 vote
0 answers
154 views

Does Mark Hadley's Theory make Sense? [closed]

I just recently discovered this theory. It claims to derive quantum mechanics from general relativity. I found this interesting and perhaps promising, but I'm afraid I don't have enough expertise to ...
Aspiring Mad scientist's user avatar
1 vote
2 answers
170 views

Combining gravity with other forces [duplicate]

We all know we have 4 fundamental forces, and among them we can combine 3 forces but not gravity as in Standard model and some other. But force is something we can measure, as Einstein told us in ...
Kawaljeet Kaur 's user avatar
2 votes
0 answers
40 views

Why is a unified field theory necessary? [duplicate]

I have read almost everywhere that the biggest questions in physics is to unify all the fundamental forces but I simply do not understand why do the forces have to follow a same set of rules or why is ...
user avatar
0 votes
0 answers
27 views

Unifying quantum mechanics and general relativity [duplicate]

I am very new to physics and I want to pursue Unified Field theory now when I read about how to unify quantum mechanics with relativity as they are essentially the same thing and a relation must be ...
BlackSusanoo's user avatar
3 votes
2 answers
883 views

Can a theory of everything solve the oldest problem of turbulence? [closed]

Can a theory of everything solve the oldest problem of turbulence? Can we have unified theory of universe without solving the problem of turbulence?
Vaibhav Pankhala's user avatar
1 vote
1 answer
117 views

Unified field theory [closed]

I had a physics thought that i'd like some clarification on. My background in math and physics isn't super sophisticated so I'd like some feedback from those who've done more research in the fields. ...
deepfriedchicken's user avatar
7 votes
4 answers
2k views

Are standard QFT and general relativity contradictory?

My professors say it's only a matter of finding the right mathematical formalism to unite GR and QFT, and that new physics can only possibly be found on extremely high energies and small scales. they ...
Matko's user avatar
  • 285