Questions tagged [unified-theories]

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Electrogravitic Biefeld-Brown Effect?

According to J L Naudin his Asymmetrical capacitor thruster device rotates due to the "electrogravitic" Biefeld-Brown effect. http://jnaudin.free.fr/html/2dacap.htm Is the thrust caused by &...
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2 answers
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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 ...
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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 ...
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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 ...
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-7 votes
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Types of physics [closed]

So I have heard that physics has three types, Classical, Relativistic and Quantum. So Relativity has two types special and general and the theory of everything (TOE) need to unify all of physics. So ...
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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 ...
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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. ...
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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 ...
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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 ...
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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 ...
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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/...
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2 answers
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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 ...
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4 answers
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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4 votes
1 answer
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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 ...
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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 ...
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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&...
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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 ...
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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 ...
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1 vote
2 answers
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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 ...
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2 votes
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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 ...
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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 ...
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3 votes
2 answers
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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?
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1 vote
1 answer
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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. ...
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3 votes
3 answers
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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 ...
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Can fundamental quantities be "unified"?

( Probably a stupid question. But the thought crossed my mind. I'm not a physicist; I'm a mathematician) Is there any way that the fundamental quantities (like length, time ) be "unified" in some ...
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Why is there a possibility for unification of GR and quantum mechanics when they are fundamentally in contradiction?

To me it's quite obvious that these theories are mutually exclusive simply by fundamental logic. QM at its very core is dependent on flat spacetime background and its implied conservation laws (...
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Can classical theories exhibit quantum-like effects?

For quite a while in the first half of the 20th century, many physicists tried to concoct some manner of unified theory to explain all known phenomenon, a lot of them using geometric theories (ie ...
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What is the justification for Dirac's large numbers hypothesis?

Dirac stated that "Any two of the very large dimensionless numbers occuring in Nature are connected by a simple mathematical relation, in which the coefficients are of the order of magnitude unity." ...
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1 answer
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Earliest existence of particles and forces

I'm trying to understand the relation between particles and forces during the very early universe--the Planck epoch and subsequent stages as the fundamental forces separated. At what point did the ...
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1 vote
2 answers
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Formal name for the "pianology" objection towards contemporary particle physics direction of research?

In a popular science book, an interesting objection towards the current direction of particle physics was stated. I tried to search for more on this, but got nowhere. Since I assume this is not an ...
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As anyone attempted to show that QM and GR cannot be unified? [duplicate]

Sometimes it possible to make very general statement about functional form of things and show, for example, that QM cannot be described by the use of hidden variable (I'm not a physicist in any sense, ...
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1 vote
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Interaction range of fundamental forces at a unification energies

At low energies, all fundamental forces have different coupling constants as well as an interaction ranges. As one know, at a some high energy (GUT energy $10^{14}$ GeV), all the coupling constants ...
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Spacetime as an independent yet interacting frame of reference for QM. Looking.for papers [duplicate]

We know that GR and QM are both valid and verified and yet for some reason they just don't want to go together. We say QM describes the microscopic while GR describes the macroscopic. I was thinking ...
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4 votes
3 answers
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Unification of gravity and electromagnetism

Have there been any attempts at unifying gravity and electromagnetism at least at classical level since Hermann Weyl's idea of gauge principle (1918)? We now have Standard Model which is very ...
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6 votes
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How does physics research work? [closed]

I am going to try and be as short and as concise as possible. I was thinking these last few days about how we're still trying to discover a unified Theory of Everything. The question is: how is this ...
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1 answer
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What if quantum mechanics and general relativity are not connected? [duplicate]

The main objective in modern physics research is to find a way to unify quantum mechanics and general relativity thorugh a series of theoretical approaches called "quantum gravity theories" But what ...
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What is the motivation for developing a "theory of everything"?

What is the reason physicists are working so hard looking for a "theory of everything" and trying to unify gravity with quantum mechanics? Historically, new theories were always developed to explain ...
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Why Einstein's unified field theory is believed not to work?

In his later life, Albert Einstein was trying to extend his general theory of relativity to incorporate electromagnetism and other fundamental forces with it, something he himself called "The theory ...
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Is Gravity still considered to be part of the "Superforce" which existed at the instant of the "Big Bang"

My limited understanding of the Big Bang is that all the Fundemental Forces (Electromagnetic, Weak Nuclear, Strong Nuclear and Gravity) were originally part of a "Superforce." As the universe cooled ...
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1 vote
1 answer
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Faraday's Law and the Law of Inertia

Faraday's Law can be stated qualitatively as : Any loop (of wire) opposes/resists the change of magnetic flux through it. The Law of Inertia states that any physical object resists its change in ...
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13 votes
5 answers
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Why do we say there are four fundamental forces in the Standard Model (if gravity is included)? [duplicate]

In my physics textbook (and in popular science culture) it is stated that there are four fundamental forces: electromagnetism, strong, weak, and gravity. But Wikipedia tells me that there is a ...
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Classification of $E_6$ symmetry breaking

Is there a good reference which details the various ways of breaking $E_6$ into smaller groups using Wilson lines? I'm looking for a list of discrete (Abelian) symmetries, e.g. $\mathbb{Z}_5$, and the ...
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Relation between electroweak force and gravity? [closed]

I'm really stuck on the following idea. For gravity to in any way be 'unified' with the electroweak interaction wouldn't it need to include a model whereby the electron somehow tunnels to within the ...
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5 votes
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Why did physicists in the 1950s and 1960s suspect the weak and EM interactions were at some level the same interaction?

Around the 1950s and 1960s there was a lot of work in particle physics motivated by two issues - finding a workable quantum field model for the weak interaction, and finding a model that unified the ...
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Mathematical challenge for unification of gravity and electromagnetism in classical theory?

I am trying to better understand the mathematical foundations of a possible reconciliation between quantum field theory and gravity in general relativity. However, before the application of the ...
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