Journal of Modern Physics
Vol.07 No.12(2016), Article ID:70242,23 pages
10.4236/jmp.2016.712143
Towards the Unification of All Interactions (The First Part: The Spinor Wave)
Claude Daviau1, Jacques Bertrand2, Dominique Girardot3
1Le Moulin de la Lande, Pouillé-les-Coteaux, France
215 Avenue Danielle Casanova, Saint-Gratien, France
395 Rue Marceau, Palaiseau, France

Copyright © 2016 by authors and Scientific Research Publishing Inc.
This work is licensed under the Creative Commons Attribution International License (CC BY).
http://creativecommons.org/licenses/by/4.0/


Received 22 July 2016; accepted 28 August 2016; published 31 August 2016
ABSTRACT
For the unification of gravitation with electromagnetism, weak and strong interactions, we use a unique and very simple framework, the Clifford algebra of space
. We enlarge our previous wave equation to the general case, including all leptons, quarks and antiparticles of the first generation. The wave equation is a generalization of the Dirac equation with a compulsory non-linear mass term. This equation is form invariant under the
group of the invertible elements in the space algebra. The form invariance is fully compatible with the
gauge invariance of the standard model. The wave equations of the different particles come by Lagrange equations from a Lagrangian density and this Lagrangian density is the sum of the real parts of the wave equations. Both form invariance and gauge invariance are exact symmetries, not only partial or broken symmetries. Inertia is already present in the
part of the gauge group and the inertial chiral potential vector simplifies weak interactions. Relativistic quantum physics is then a naturally yet unified theory, including all interactions.
Keywords:
Electromagnetism, Weak Interactions, Strong Interactions, Gravitation, Clifford Algebra, Dirac Equation, Lagrangian Formalism, Gauge Groups, Relativistic Invariance, Electron, Magnetic Monopole, Quark, Photon, Gauge Boson, Unification

1. Introduction
The aim of this work is to construct with the same logic and mathematical rigour of General Relativity (GR), a quantum wave of all fermions of one generation in a well-defined framework: the wave is a function of space and time into
where
is the Clifford algebra of space. We extend the relativistic constraints and replace the
group by the greater group
and we use only true representations and exact calculations. The Lagrangian density has a double link with the wave equations, both cause and consequence. This is new and gives both the limits and the physical reason of the existence of a Lagrangian formalism. We present here the fermionic part of the wave equations. The wave equations have mass terms, and they are invariant both under
and under precisely the
gauge group of the Standard Model of Quantum Physics (SM). This gauge symmetry is a local and exact one. Complicated calculations of the second quantization are not used. Spontaneously broken symmetry is useless. Nevertheless we get many results of the SM, with less free parameters, which is better. Mass terms of our wave equations allow us to study inertia and gravitation directly from the wave equations. The inertial part of the gravitation generates eight potential space-time vectors. Only seven of these eight terms are present in the Christoffel symbols used in differential geometry. The eighth, the chiral one, is yet in the
gauge and explains the complexity of weak interactions. Using this chiral inertial potential vector, we simplify the electro-weak gauge. We study here the fermionic part of the SM. This SM uses also twelve bosons whose components are built from the tensorial densities available from the spinor wave. They will be detailed in another article.
After Maxwell’s electromagnetism, the discovery of electromagnetic wave and the understanding of the electromagnetic properties of light, electromagnetic laws became relativistic covariant laws [1] . The electromagnetic field became an anti-symmetric tensor and the Maxwell’s laws were invariant under a greater group than the invariance group of mechanics. In 1915, Einstein was able to include the gravitation in the same frame. His theory of gravitation (GR) [2] [3] is extremely precise, and gravitational waves are now experimentally observed. Next Einstein tried to reunite electromagnetism and gravitation into a unique field theory [4] .
From relativistic ideas de Broglie found the wave associated to the movement of any particle [5] . Only a few months after his dissertation, Schrödinger found a non-relativistic wave equation for his wave. This wave equation explained the quantization of energy levels and started quantum mechanics. At the same time, the spin 1/2 of the electron was discovered. Pauli gave a non-relativistic wave equation accounting for the spin 1/2. This equation was the starting point used by Dirac to get his wave equation [6] . The Dirac equation is such a success that now again it is an important item of the SM. Only the Dirac equation actually explained the true number of energy levels, the true energy levels and quantum numbers of the hydrogen atom [7] . Nevertheless if the Dirac equation was, a long time ago, explained in many books from Ref. [8] to [9] , then quantum mechanics even forgot to teach this part of the quantum theory [10] . First the Dirac wave was the wave of only one electron while the Schrödinger equation accounted for systems of electrons. Next the problem of negative energies was not solved by the Dirac equation, the charge conjugation did not account for negative energies in the framework of the first quantization, only the second. With this second quantization the electromagnetic field became a field of operators creating and annihilating photons, with bras and kets in Hilbert linear spaces. This field followed a Hamiltonian dynamics with a Schrödinger equation and its unique time variable [11] . Therefore, even if quantum fields incorporated the electromagnetic field and should be compatible with GR, the methods of the second quantization, with path integrals and Feynman graphs, were not sufficient to incorporate GR. Several problems arose1, often not well exposed, either presenting the Dirac equation from a Hamiltonian dynamics2, either forgetting that the matrices of 


We began our work with the Dirac equation of the electron [6] . All calculations are there made with mathematical rigour [7] and with very accurate experimental results. Another reason of this work is the study of the finite representations of the Lorentz proper group [18] : relativistic quantum mechanics uses not the Lorentz group but another one, in a way which is not a consequence of the principles of the theory.
2. Waves and Wave Equations
Since 1928 the relativistic invariance of the Dirac theory used the previous Pauli matrices for the spin of the electron: the space-time variable 

This is equivalent to say that the three Pauli matrices:

form a orthogonal oriented basis in space. We shall put arrows on vectors in space, so any vector reads

Contrary to the Clifford community [19] - [22] we use the matrix representation generated by the Pauli matrices. First the geometric algebra of space 








The application 




Space-time is then made of the auto-adjoint part of the space algebra. We use:
The main reason to the use of the geometric algebra 


It is made of eight waves, functions of space-time with value in 




For 

Our non-linear wave equation of the electron, which has the Dirac equation as linear approximation when the Yvon-Takabayasi angle is small or negligible, reads [23] - [35] :

where 






Relations (2.13) are the reason of the existence and the definition of “left” and “right” waves in quantum physics. Right waves transform with a left multiplication by M while left waves transform by a multiplication by







where 
Equations (2.10)-(2.13) have no geometric reason to be restricted to














and the R transformation satisfies:

Then 














Then, if we suppose 

And we are allowed to say that this equation is “form invariant” since it has exactly the same form in the primed and non-primed basis. We explained how the variation of the mass term is linked to the 






This J current is the conservative probability current, 
3. Weak and Strong Interactions
We studied strong and weak interactions with Clifford algebras having two fictitious supplementary dimensions [25] [37] - [41] of space. Since space-time has one dimension more than space, we passed from three to six dimensions. This induces three doubling of the dimension of the algebra, and we get the same number of variables if we replace 










with the Weyl representation:

Consequently the 









The covariant derivative reads:

with

for 


Three operators act on the quark sector like on the lepton sector:

The fourth operator acts differently on the lepton wave and on the quark sector:

The value −1/3 is compulsory [45] [46] and gives the four correct values of the charges of quarks and anti-
quarks [25] [47] . To simplify notations we use now 

and

Since the left up term of each matrix 
3.1. The Lepton Wave
Only the 

We study first the lepton part of the wave equation. The lepton sector of the standard model, for the first generation, accounts for the electron, the positron, the left neutrino and the right anti-neutrino. We note the wave 


Like previously 




where we use the matrix representation of Weyl matrices (3.2) which gives:

We use (2.7), 


The lepton wave reads:

It is a well-defined function of space and time with value into the space-time algebra



matrices:

Then for particles left waves are 



To get the gauge group of the Weinberg-Salam theory we let (see [26] 6.1):

We explained there how the covariant derivative of the Weinberg-Salam model used:

with 

weak hypercharge, 

which express the covariant derivative in a unique term:

For the calculation of the covariant derivative we use the Socroun’s method incorporating the 




A detailed calculation was made in [26] 6.1. We have previously supposed that 








This system is equivalent to:

These derivatives are exactly equivalent to those of the Weinberg-Salam model. Equation (3.10) reads

where 





When the wave of quarks is zero we also have:

The lepton wave Equation (3.25) is equivalent to the system:

3.2. Double Link with the Lagrangian Density
For comparing the previous equations with the usual complex matrix formalism, we associate to 




Equations (3.28) are equivalent to:

Like with the linear Dirac mass term, the covariant derivatives of left spinors are linked by the mass term to right ones and the covariant derivatives of right spinors are linked by the mass term to left ones. But we now have 




Now we multiply on the left side the second relation (3.28) by

With the left 


We name 


This gives:

Then (3.32) is equivalent to:

This complex equation is equivalent to the real system:

We remark that we get not four numeric equations but only two for the four variables of the 



With the left 


This equation is equivalent to:

This complex equation is equivalent to the real system:

because


We let:

We get:

With the left 


This equation is equivalent to:

Separating the real and the imaginary part we get the equivalent system:

We multiply on the left the last Equation (3.28) by

With the left 


This equation is equivalent to:

Separating the real and the imaginary part we get the equivalent system:

Adding and subtracting the second Equations (3.46) and (3.50) we get:

The lepton part of the Lagrangian density is the sum of the real parts in (3.36), (3.40), (3.46), (3.50):

This gives:

Since 

Now we derive the wave equations resulting from the Lagrange equations. The Lagrange equation:

gives

which is the first Equation (3.30), equivalent to the first Equation (3.28). Similarly deriving with 
the third Equation (3.30), equivalent to the third Equation (3.28). Next the Lagrange equation

gives

which is equivalent to the second Equation (3.28). The Lagrange equation 
last Equation (3.28). This establishes the double link between wave equations and Lagrangian density. The link from Lagrangian density to wave equations was known from the beginning of quantum mechanics. The link from wave equations to Lagrangian density is the true reason of the existence of a Lagrangian mechanism. This link is much stronger than the first one on the physical point of view, because the old link supposes an integration by parts and a cancellation of terms. The possibility of this cancellation is dubious in the case of propagating waves (like gravitational waves).
3.3. Double Link with the Lagrangian Density (Quark Case)
Noting 


We note 



When 


where in 


And when the 

This is a sum of 72 terms, all positive.
3.4. The Quark Wave
Like in the lepton case the Lagrangian density is doubly linked to wave equations in the quark case. The Lagrangian density reads:


We can derive from this Lagrangian density the wave equations:




To get the Lagrangian density from these wave equations we multiply (3.66) on the left by 


and we get:

Then (3.66) gives:

Like in the lepton case, the particular form of this wave equation allows us to get an equivalent system with only two numeric equations:


By adding and using 

Only the sum of the three currents generated by the three colors of the d quark is a conservative space-time vector. Similarly for the u quark, with colour states 

Next the particular form of this wave equation allows us to get an equivalent system with only two numeric equations:


And we also get

For the left waves, we multiply (3.68) on the left by 



Here also this wave equation is equivalent to a system of only two numeric equations:

Finally for the left waves of the u quark we have:

Here also this wave equation is equivalent to a system of only two numeric equations:

For the left waves of quarks only one sum gives a conservative space-time vector, because the weak gauge links the waves of the u and d quarks:

This means that a conservative probability current does not exist for an isolated coloured quark, and this is well known, since it is impossible to observe such isolated states.
The Lagrangian density 





3.5. Lessons of This Calculation
The previous calculation proves that the use of 




The existence of the double link has other consequences that we shall develop in the second part of this work on the boson part of the SM: only the fermion wave is linked to a Lagrangian density which is made of the wave equations and is then necessary. The dynamics of the boson part must then be a consequence of the dynamics of the fermion wave. The SM considers the dynamics of boson waves as a consequence of the Lagrangian density, but the relations between potentials and fields are not deduced, they are postulated independently of the laws giving the dynamics of the fields.
We previously got this double link, first in the wave of the electron [33] , next for electro-weak and strong interactions [25] [26] , but we did not see the reduction of the number of the numeric equations. The reason was the rebuilding of the wave equation on the Dirac form from the Lagrangian density, the 



Moreover the 16 equations containing 

The building of the wave equations from the Lagrangian density uses 


Finally the synthesis of all interactions in a unified frame is the simple question: how these dynamical quantum equations are linked to GR?
4. Inertia and Gravitation
In [26] Ch.9 we considered an element M not restricted to be constant in space-time. In the vicinity of a point x where 

where 


The dilation D defined from M in (2.10) gives:

Christoffel’s symbols 

we then get

Since D is a dilation, product in any order of a Lorentz transformation and an homothety, the Christoffel’s symbols have this particular form and we get not 64 but only 




with the same


Therefore we get for covariant vectors the usual transformation:

This relation allows the covariant derivative to be commutative with contractions. It leads the covariant derivative back to partial derivative for scalars. The connection (4.5) is new, because all preceding attempts have used variable








trices are not changed in the frame of
A non vanishing torsion was used previously by A. Einstein [4] to unify gravitation and electromagnetism. Since his attempt was studied at the very early times of quantum mechanics he evidently did not start from the Dirac wave, which was invented 3 years later. We next get

with

This introduces 8 space-time vectors that we name “potentials of inertia”:

In space algebra we need also

Now we look at the simple case (negligible gravitation) where all terms 


Without the neutrino and quarks wave, we have 



Using the main automorphism on the first Equation (4.14) we get

The wave equation of the electron alone is then equivalent to the system:

This system reads:

If we have:

using

we get:

which is our wave Equation (2.9) of the electron alone, with the only change of 



Now we consider the neutrino wave where 






Without quark and electron waves, we have 


Using the main automorphism on the first Equation (4.22) we get the system:

This gives:

Adding we get:

which is a Dirac-like wave equation in inverse order. Next if we consider the 




This gives:

And the wave equations become:

which also are Dirac-like wave equations.
Since a mass term is present in the wave equations we are able to study in an unified way quantum behaviour and inertia-gravitation. In a rotating frame [51] the limit speed is not equal to c but varies. The limit speed becomes 



The inclusion of inertia necessitates the use of two forms of differential operator, acting on the right or on the left side. This unified behaviour links the complicated operators of the electro-weak gauge to the unique electric gauge. The SM is not only able to incorporate inertia and gravitation. This is already realized since 1928 in the Dirac theory. The gravitation is not a very little force, it has the same strength as electromagnetism, but this is usually not obvious, because the proper masses of quantum physics are very small in comparison with the Planck mass.
5. Conclusions
All waves of the fermion part of the SM may be described as functions of space-time in the Clifford algebra of space. Contrary to the common expectation, the algebra of space is the framework of the unification of all interactions, not the algebra of space-time. The global wave is a function of space-time in a 64-dimensional linear space isomorphic to




The wave equations result from Lagrange equations calculated from a Lagrangian density and this Lagrangian density is exactly the sum of the real part of these wave equations. This gives both the reason and the limit of the Lagrangian physics. This limit comes from the fact that only the fermion part of the SM allows us to get a double link between wave equations and Lagrangian density.
The Lorentz group of the restricted relativity is extended to a greater group of invariance. This group has a geometric origin, since it is the 










We previously studied several particular cases and we obtained several important results: the gauge invariance is exact in the particular case where only the electron has a non-zero right wave [26] . In a second paper, we will study this gauge invariance in the general case. We explained in [46] how the additivity of the potential terms is equivalent to the Pauli principle. We have less free parameters in comparison with the SM using second quantification, because the study of the electron fixes the value of the Weinberg-Salam angle [45] . Consequently this fixes the values of the charges of quarks and antiquarks [46] . The proper masses are no more the fundamental quantities that the theory must account for. These fundamental quantities are actually the 
Old questions may also receive a very different answer: the density of probability is in the non-relativistic quantum theory a fundamental quantity; it is the square of the modulus of the wave. This has survived in the Dirac theory, because the density of probability becomes





Cite this paper
Claude Daviau,Jacques Bertrand,Dominique Girardot, (2016) Towards the Unification of All Interactions (The First Part: The Spinor Wave). Journal of Modern Physics,07,1568-1590. doi: 10.4236/jmp.2016.712143
References
- 1. Einstein, A. (1905) Annalen der Physik, 322, 891-921.
http://dx.doi.org/10.1002/andp.19053221004 - 2. Einstein, A. (1915) Preussische Akademie der Wissenschaften. Sitzungsberichte, Berlin, 778-786, 799-801.
- 3. Einstein, A. (1915) Preussische Akademie der Wissenschaften. Sitzungsberichte, Berlin, 831-839.
- 4. Einstein, A. (1925) Sitzungsberichte der Preussischen AKADEMIE der Wissenschaften. Physikalisch-matheatische Klasse, Berlin, 414-419.
- 5. De Broglie, L. (1924) Annales de la Fondation Louis de Broglie, 17, 1-109.
- 6. Dirac, P.A.M. (1928) Proceedings of the Royal Society of London, 117, 610-624.
http://dx.doi.org/10.1098/rspa.1928.0023 - 7. Darwin, C.G. (1928) Proceedings of the Royal Society of London, 118, 554.
- 8. DeBroglie, L. (1934) L’électron magnétique. Hermann, Paris.
- 9. Messiah, A. (1959) Mécanique quantique. tomes 1 et 2, Dunod, Paris.
- 10. Cohen-Tannoudji, C., Diu, B. and Laloë, F. (1973) Mécanique Quantique. tomes 1 et 2, Hermann, Paris.
- 11. Strange, P. (1998) Relativistic Quantum Mechanics. Cambridge University Press, Cambridge.
http://dx.doi.org/10.1017/CBO9780511622755 - 12. Sterman, G. (1993) An Introduction to Quantum Field Theory. Cambridge University Press, Cambridge.
http://dx.doi.org/10.1017/CBO9780511622618 - 13. Greiner, W. and Müller, B. (2009) Gauge Theory of Weak Interactions. Springer-Verlag, Berlin.
http://dx.doi.org/10.1007/978-3-540-87843-8 - 14. Scheck, F. (1996) Electroweak and Strong Interactions. Springer, Berlin.
http://dx.doi.org/10.1007/978-3-662-03245-9 - 15. Weinberg, S. (1967) Physical Review Letters, 19, 1264-1266.
http://dx.doi.org/10.1103/PhysRevLett.19.1264 - 16. Taylor, J.C. (1976) Gauge Theories of Weak Interactions. Cambridge University Press, Cambridge.
- 17. Georgi, H. and Glashow, S.L. (1974) Physical Review Letters, 32, 438-441.
http://dx.doi.org/10.1103/PhysRevLett.32.438 - 18. Naïmark, M.A. (1962) Les représentations linéaires du groupe de Lorentz. Dunod, Paris.
- 19. Hestenes, D. (1973) Journal of Mathematical Physics, 14, 893-905.
http://dx.doi.org/10.1063/1.1666413 - 20. Hestenes, D. (1986) A Unified Language for Mathematics and Physics and Clifford Algebra and the Interpretation of Quantum Mechanics. In: Chisholm, J. and Common, A., Eds., Clifford Algebras and Their Applications in Mathematics and Physics, Reidel, Dordrecht, 1-23.
- 21. Boudet, R. (1995) The Takabayasi Moving Frame, from a Potential to the Z Boson. In: Jeffers, S. and Vigier, J., Eds., The Present Status of the Quantum Theory of the Light, Kluwer, Dordrecht, 471-481.
- 22. Boudet, R. (2011) Quantum Mechanics in the Geometry of Space-Time. Springer, Berlin.
http://dx.doi.org/10.1007/978-3-642-19199-2 - 23. Daviau, C. (2011) L’espace-temps Double. Je Publie, Pouillé-les-coteaux.
- 24. Daviau, C. (2012) Nonlinear Dirac Equation, Magnetic Monopoles and Double Space-Time. CISP, Cambridge.
- 25. Daviau, C. and Bertrand, J. (2014) New Insights in theStandard Model of Quantum Physics in Clifford Algebra. Je Publie, Pouillé-les-coteaux.
http://hal.archives-ouvertes.fr/hal-00907848 - 26. Daviau, C. and Bertrand, J. (2016) The Standard Model of Quantum Physics in Clifford Algebra. World Scientific, Singapore.
http://dx.doi.org/10.1142/9789814719872_fmatter - 27. Daviau, C. (1993) Equation de Dirac non linéaire. PhD Thesis, Université de Nantes, Nantes.
- 28. Daviau, C. (1997) Advances in Applied Clifford Algebras, 7, 175-194.
- 29. Daviau, C. (1997) Annales de la Fondation Louis de Broglie, 22, 87-103.
- 30. Daviau, C. (1998) Annales de la Fondation Louis de Broglie, 23, 1.
- 31. Daviau, C. (2001) Annales de la Fondation Louis de Broglie, 26, 149-171.
- 32. Daviau, C. (2005) Annales de la Fondation Louis de Broglie, 30, 3-4.
- 33. Daviau, C. (2012) Double Space-Time and More. Je Publie, Pouillé-les-coteaux.
- 34. Daviau, C. (2012) Advances in Applied Clifford Algebras, 22, 611-623.
http://dx.doi.org/10.1007/s00006-012-0351-7 - 35. Daviau, C. (2015) Advances in Applied Clifford Algebras.
http://dx.doi.org/10.10007/s00006-015-0566-5 - 36. Loebl, E. (Editor) (1968) Group Theory and Its Applications. Academic Press, New York.
- 37. Daviau, C. and Bertrand, J. (2014) Journal of Modern Physics, 5, 1001-1022.
http://dx.doi.org/10.4236/jmp.2014.511102 - 38. Daviau, C. and Bertrand, J. (2014) Journal of Modern Physics, 5, 2149-2173.
http://dx.doi.org/10.4236/jmp.2014.518210 - 39. Daviau, C. and Bertrand, J. (2015) Journal of Modern Physics, 6, 1647-1656.
http://dx.doi.org/10.4236/jmp.2015.611166 - 40. Daviau, C. and Bertrand, J. (2015) Journal of Applied Mathematics and Physics, 3, 46-61.
http://dx.doi.org/10.4236/jamp.2015.31007 - 41. Daviau, C. and Bertrand, J. (2016) Journal of Modern Physics, 7, 936-951.
http://dx.doi.org/10.4236/jmp.2016.79086 - 42. Lochak, G. (1983) Annales de la Fondation Louis de Broglie, 8, 345.
- 43. Lochak, G. (1984) Annales de la Fondation Louis de Broglie, 9, 5.
- 44. Lochak, G. (1985) International Journal of Theoretical Physics, 24, 1019-1050.
http://dx.doi.org/10.1007/BF00670815 - 45. Daviau, C. and Bertrand, J. (2015) Journal of Modern Physics, 6, 2080-2092.
http://dx.doi.org/10.4236/jmp.2015.614215 - 46. Daviau, C. and Bertrand, J. (2015) Annales de la Fondation Louis de Broglie, 40, 181-209.
- 47. Daviau, C. (2013) Advances in Imaging and Electron Physics, 179, 1-137.
http://dx.doi.org/10.1016/B978-0-12-407700-3.00001-6 - 48. Socroun, T. (2015) Advances in Applied Clifford Algebras, 25, 1-9.
- 49. de Broglie, L. (1964) La Thermodynamique de la particule isolée. Gauthier-Villars, Paris.
- 50. Boudet, R. (1985) Journal of Mathematical Physics, 26, 718-724.
http://dx.doi.org/10.1063/1.526613 - 51. Daviau, C. and Bertrand, J. (2012) Annales de la Fondation Louis de Broglie, 37, 129-134.
NOTES
1The non-relativistic wave of a system of n electrons is a function on the
field of 3n + 1 variables, the 3n coordinates of each particle, and a unique time. The number of particles is changing with creations and annihilations; therefore it is impossible to know precisely what a quantum state is. Nevertheless it is necessary to be able to compute integration on these indefinite linear spaces. The Dirac wave is a function on
not on
.
2In Ref. [12] the first part of the book presents canonical quantization, Green functions, path integrals and S-matrix from the non-relativistic quantum theory. The author writes (page 162) “the Dirac equation may be thought of as a relativistic generalization of the Schrödinger equation”, which is false because the four 
3The matrix 




