Unification Definition and 99 Threads

Can LSS unification (gravity, gauge, Higgs) be quantized à la "new LQG"? This came out in April. We had it on our second quarter MIP ("most important paper") poll. https://www.physicsforums.com/showthread.php?t=413838 So far, this is a classical treatment. And it uses a spacetime manifold...

Has anyone read Sach's textbooks and papers? What is incosistent in his approach, as far as I can tell there's already a theory of electroweak force, so if he did unified EM and the nuclear forces it's a great success, but has he really succeeded?

http://arxiv.org/abs/1004.4866 Unification of gravity, gauge fields, and Higgs bosons A. Garrett Lisi, Lee Smolin, Simone Speziale 12 pages (Submitted on 27 Apr 2010) "We consider a diffeomorphism invariant theory of a gauge field valued in a Lie algebra that breaks spontaneously to the direct...

http://arxiv.org/abs/1004.4866 Unification of gravity, gauge fields, and Higgs bosons A. Garrett Lisi, Lee Smolin, Simone Speziale (Submitted on 27 Apr 2010) We consider a diffeomorphism invariant theory of a gauge field valued in a Lie algebra that breaks spontaneously to the direct sum...

The ultimate goal of physics is to be able to describe all physical phenomena under one solid structure. To have a single way to express everything, and to many that lies in an equation somewhere. We seek a unified field theory. We have been able to successfully quantify much of what we observe...

By unification I mean a unified theory of everything. And I am implying that this hypothetical unification would bring forth a whole new level of technology, and assuming that it's application could range from tools of war and destruction, generally speaking god like power. But would also...

Is EM theory in curved spacetime the same as "unification"? I am wanting to learn about classical EM theory in curved spacetime (just curious) and I found this old thread containing some references https://www.physicsforums.com/showthread.php?t=3950 Is simply talking about the EM field in...

http://arxiv.org/abs/1002.1497 :-p :smile: :smile: I just mentioned RCHO in other thread, and an article appears. Very predictive, I am :-DDDI haven't read it. I will not, most probably, in a few days. But I feel it could be place for a thread on the topic of relationship between unification and...

This is a movement we are seeing take shape now. It involves recent work by Shaposhnikov and Wetterich, by Meissner and Nicolai, by Steven Weinberg, by Roberto Percacci, and by others. The clearest statement so far was by Hermann Nicolai in his talk at the Wroclaw July 2009 Planck Scale...

Atyy spotted this paper yesterday http://arxiv.org/abs/0911.3793 Gravity-Yang-Mills-Higgs unification by enlarging the gauge group Alexander Torres-Gomez, Kirill Krasnov (University of Nottingham) (Submitted on 19 Nov 2009) "We revisit an old idea that gravity can be unified with Yang-Mills...

Are all string theory based unification of 4 forces predicated on GUT? If GUTs (whether SU(5) to SO(10)) are all false, and not the way nature works, does this mean that string theory unification is also false?

Hi pals Could someone introduce me some docs about the unification of electric and magnetic forces? thanks alot

Let me define Grand Unification as I use it so there aren't semantical arguments. Some would term this the Theory of Everything, however I'm not very satisfied with that particular phrasing. A) The combination of Gravity, Electromagnetism, Strong Nuclear Force, Weak Nuclear Force into one...

Questions: Where can I obtain the most advanced published papers regarding valid unification theories? If there are none, which published papers will get me closest when combined in their respective categories? Comment: It is obvious to me through speculation, physical laws have yet to...

Is it true that the existence of extra dimensions can lower the unification scale to the GeV scale? Does this mean that the LHC would be in range to detect a unification of couplings if this were true?

Hi guys, I'm reading about unification of gauge couplings in the presence of extra dimensions but I'm coming unstuck in my understanding of what a Kaluza-Klein mode/excitation/tower is. I've looked ont he net and in string theory books but have been unable to find mcuh that is helping my...

How do Planck's photon theories relate to the belief that all forces may be unified at high speeds? I understand that light waves can act as particles, and particles can act as light waves. Waves/particles emit energy. And Planck's scale is believed to be around the length of convergence of...

Is it currently being researched as to how the four fundamental forces we know of can somehow just be one greater force working differently. Didnt einstein try to figure this out. I am not sure if this is the right section for this kind of question.

Hi guys, I am doing a dissertation on one of these topics and wondered if anyone knows of some good books that may be good to start out from. Especially if the books focus on the particle physics aspects of these topics. So any books for CP violation and the imbalance of antimatter to...

Frank Wilczek has brought out a book The Lightness of Being that is a perfect follow-up to Lee Smolin's The Trouble with Physics. Wilczek presents a vision of unification that is predicts phenomena at LHC energies, that is understandable and relevant in terms of today's experiments, and...

Hi: The electromagnetic and weak interactions were unified in what is called the electroweak interaction, but as long as I know they are different classes of interactions, what I mean is that in weak interactions, there are particles that transform in others (like neutron's beta...

Recently (25 July) Lee Smolin posted an update of his December 2007 unification paper http://arxiv.org/abs/0712.0977 The Plebanski action extended to a unification of gravity and Yang-Mills theory "We study a unification of gravity with Yang-Mills fields based on a simple extension of the...

What is your opinion that every different science, physics, mathematics, phychology are different views of the same thing. For example boundaries in physics speed of light, boundaries in mathematics (godel principle) or in phychology (the unexplained of the personality) exist and try to explain...

I am inquiring if anyone here is qualified to numerically demonstrate the solution to this equation? The equation is the Proton lifetime derived from the SU(5) Georgi-Glashow model listed in reference 1, eq. (19). SU(5) Proton lifetime: \tau_p \geq \frac{1}{\alpha_{(5)}^2} \frac{M_X^4}{m_p^5}...

i didn't know where else to post this. so my question is... we know from Einstein that energy can be matter and vice versa... but it is easier to convert matter to energy. my question is if strings are quantum matter then it must be very close to a quantum of energy (whatever it is)...

What does it mean to have a model that is SU(2)xU(1)? Does it have anything to do with the electro-weak unification? I asking this because the weak interaction has 2 bosons and the electromagnetic interaction has 1 boson... :confused:

(here's more on SISSA if you want) Here's Percacci's page: http://people.sissa.it/~percacci/ Here's a sample: ==exerpt== ASYMPTOTIC SAFETY A quantum field theory that is perturbatively renormalizable and asymptotically free can be regarded as a fundamental theory, because it makes sense up to...

proposal: Gravity is an effect of uncertainty gradients. Probability density currents are recognised phenomina in quantum mechanics/dynamics. A wave-particle's uncertainty is acknowledged as a fundamental property, oscillating through space and time. The classic experimental...

Could someone somewhat plainly explain what is unification, when it is used and what does it "buy"? I just have heard of it and searched online a bit but it is a bit hazy for me. A small example would be appreciated as well :redface: .

When I think about unification it makes me wonder what things we would actually answer because of it... Would unification be a law that covers all areas of the universe, inter-dimensional or not, even the unknown? It makes me think about a lot of the unknown that we simply have no answers to...

It seem that if gravitational waves travel at C, that this is a hint that there is unification between gravity and electromagnetism. Didn't Einstein once remark about this? Thanks RAD

A while ago I was watching this video on queantom physics and this dude was talking about the Theory of unification that explains everything from magetic, gravity of large aboject and gravity of very small and dence objects like black holes and I think some other things. So has anybody found...

The Reader is invited to help this thread become rigorous. If any links should not fubction, inform me, I will try to correct them. Currently this thread is an analogous interpretation of circumstantial evidence and incomplete information. The writer has attempted to crudely use the...

To be science a theory must bet its life on the outcome of some future observation. That is what it means to predict something new and to be falsifiable. If the observation goes against the theory's prediction then the theory is wrong. so the theories of space time and matter that are currently...

hi i have been reading in many books that the unification of quantum mechanics and general relativity is not possible. but why? it is clear that we cannot use a certain theory for certain phenomen in the universe and other theory for the rest phenomenas of the world. at singularity we have...

If the strong coupling goes to zero in the infrared... is there some scale at which it has the same value that the electromagnetic coupling? At this energy, a quark should attract another quark with about the same force it should attact an electron. Curious.

Hey I am new to the site...i have to write an essay on 'an unsolved problem in modern physics' I've started (i chose GUTs) could sum1 check it over and if possible help me out cos I am stuk! :( An unsolved problem in modern physics: The problem I will be discussing is that of the ‘Grand...

if empty space has dark energy. Then if you put a lot of space in one place at once then you would have a lot of energy. Then becuase E=mc^2 all that energy could coalesce into matter. Therefore all matter could be space. this unifies spacetime and matter energy this is just a theory...

Physics is always trying to unify the forces and combine theories into one super theory. Why is this assumption always made and never questioned ? Why couldn't we indeed be in a world with 4 forces or maybe even 50 different forces governed by 50 different perfect theories that don't unite and...

I thought some here might enjoy a more pedestrian discussion of issues involved in unifying quantum theory with general relativity. I know I do. I need an occassional refresher course to get a grip on the brain bending stuff I usually read: The Problem of Time...

Please Help Explain... Can sombody please explain what all the unification theory has to explain to be right. As far as pass theories (that have to be still be correct according to it), and what forces goes. :-p

It is my view that the road to a unified quantum theory of gravity and electromagnetism begins with unifying GR and E&M classically (i.e. a non quantum mechanical formulation). They show so may similarities that they may be more closely related than we think.

I don't know if this paper was commented on here while I was away at Christmas time, but I was just pointed to it by a paper on today's arxiv and I think it desrves notice. http://arxiv.org/abs/hep-th/0411073 Robert Dijkgraaf, Sergei Gukov, Andrew Neitzke, and Cumrun Vafa; Toplogical...

This is concerned with "unification" in the sense of the coming together of observer and observed. Generally speaking, theory arises from experience. So in order to develop a theory of unification, surely we need to experience unification first? Theoreticians often rely on experiment...

Mathematically speaking, the existence of a "dual" vector space, abstractly reflects the relationship between row vectors (1×n) and column vectors (n×1). The construction can also take place for infinite-dimensional spaces and gives rise to important ways of looking at different...

The strong coupling constant is given by a (E)= 12 PI/ (33 - 2NF) H [E^2 / LAMBDA^2 nf = number of quarks in pair production. Three questions: What is E the energy of? If there were more than six quarks how would this affect the strong coupling constant? If forces can be unified why...

When people talk about the Theory of Everything, they usually think of the theories that are trying to unify GR and QM (such as SMT and LQG), since this is what the majority of Theoretical Physicists are working toward, unification. However, I've just begun reading Smolin's Three Roads to...

String Field Theory may be thought of as a theory of abstract entities such as strings and vibrating membranes. It may also be thought of as a theory of Resonances in the projective fashion of a holographic theory of fibers/fibrations and unitary measures. Since I am too tired at the moment to...

I am nearly certain that it has been suggested that three of the four now thought to be fundamental causes of motion have been unified. Excluding gravity, these are : the weak force, the strong force and electromagnetism. Can someone please explain to me what indicates or how it was shown that...