Photocosmos, Is the Universe Made of Light? Photons, Particles, Gravitation from the Electromagnetic Vacuum ()
1. Introduction
Following the publication of Maxwell’s equations in 1865, the vector potential
was considered to be simply a mathematical function, with no physical existence [1] [2]. It permits to calculate the electric
and magnetic
fields of the electromagnetic waves, considering generally the scalar potential to be constant in space [3]. In 1949, W. Ehrenberg and R. E. Siday put in evidence experimentally the direct influence of the vector potential on charges [4]. This was also confirmed later by R. G. Chambers (1960) followed by the works of A. Tonomura (1982) and N. Osakabe (1986) [5]-[7]. Hence, the physical reality of the vector potential and its direct influence on charges in absence of electric and magnetic fields has been demonstrated experimentally. It is well established that the electric and magnetic fields derive from the vector potential which is a real field and constitutes the essence of the electromagnetic waves [3] [8]-[10].
Thus, the quantization of the electromagnetic field in QED is based precisely on the vector potential [11]-[13]. In recent years, the vector potential quantization has been enhanced to a single photon level putting in evidence the electromagnetic vacuum, a real field having equivalent representation in classical and quantum theories and overcoming the zero-point energy singularity in QED [14]-[18]. Photons are oscillations of the electromagnetic vacuum. In addition, the electron-positron elementary charge derives naturally during the photon vector potential quantization process. Hence, it has been shown that the photon vector potential is directly related to the elementary charge and mass entailing that the electron and positron may be composed of (standing) states of photons in specific topological configurations.
We advance here the possibility that all the elementary particles are composed of charges, which themselves are states of photons, establishing the mass-charge equivalence relation. It is drawn that the universe may be composed entirely of light issued from the electromagnetic vacuum. In addition, it is put ahead that gravitation is an electromagnetic effect and it is shown that the gravitational constant depends directly on the electromagnetic vacuum density of states entailing that it may not be universal.
2. Photons from the Electromagnetic Vacuum
Before addressing the electromagnetic nature of all elementary particles it is of crucial importance to recall briefly the main features of the photon vector potential quantization leading to the electromagnetic vacuum with the associated cosmological implications.
2.1. Photon Vector Potential - Energy Quantum Equation and the
Photon Wave Function
The photon wave function
for a free k-mode photon with angular frequency
and circular polarization left (L) or right (R), corresponding respectively to spin
, is expressed as follows [19] [20]
(1)
where
is the circular polarization complex unit vector,
the wave-vector with amplitude
,
is the wavelength of the mode k and θ a phase parameter.
satisfies Maxwell’s propagation equation in vacuum,
(2)
Helmholtz equation,
(3)
and the photon vector potential - energy quantum equation,
(4)
expressing both the first (energy) and second (vector potential) quantization of the electromagnetic field corresponding to k-mode photons with energy
and vector potential amplitude
.
The operators involved in (4) write
(5)
where
merely means that the gradient acts upon the mode k.
The vector potential quantization constant is
(6)
with
Planck’s reduced constant, c the speed of light in vacuum and e the electron-positron elementary charge. Note that ξ can be negative or positive [14]-[16].
The function
issues [21] from the photon vector potential function
with the quantized amplitude
(7)
Overcoming the point photon concept,
is normalized with respect to the photon quantization volume Vk, an intrinsic topological property issued from both the density of states theory and the energy normalization process of a plane electromagnetic wave to a single photon [19]
(8)
The normalization condition is satisfied with respect to the quantization volume
(9)
Obviously, according to (1) and (7), the photon wave function
depends fundamentally on the main function of the vector potential
(10)
It is straightforward to show that the mean values of the relativistic massless particle Hamiltonian and the momentum operator in the single photon state, respecting the quantization volume Vk, give the single photon energy and momentum respectively [20]
(11)
(12)
The precession of the quantized vector potential around the propagation axis at the angular frequency
with circular polarization gives birth to orthogonal electric
and magnetic
fields whose amplitudes are proportional to
and the corresponding magnitudes, that is the square root of the sum of the squares of the components, are obtained directly from Maxwell’s equations [19] [20]
(13)
with
the vacuum magnetic permeability.
In addition, the energy density for a single photon state as a pointless particle is readily obtained and is identical in both classical and quantum representations
(14)
showing the self-consistency of the developed formalism.
2.2. The Electromagnetic Vacuum
We recall that the zero-point energy in QED issues from the harmonic oscillator Hamiltonian and represents a constant. Therefore, it commutes with all quantum mechanics Hermitian operators corresponding to observables and consequently is not responsible for the vacuum effects such as the Lamb shift and the spontaneous emission. In fact, the last effects are calculated in QED by using the photon creation and annihilation operators [22]. In addition, it has been demonstrated that the Casimir effect is due to Lorentz’s forces of source fields and not to the zero-point energy [23]-[26]. Finally, the density of the zero-point energy conflicts with recent well-validated astrophysical observations by 120 orders of magnitude leading to the well-known vacuum catastrophe riddle, a real cosmological problem [27]-[30].
In fact, the zero-point energy of the electromagnetic field issues from the fundamental mathematical ambiguity consisting of replacing commuting classical canonical variables of position and momentum by the non-commuting corresponding quantum mechanics operators [12] [15]. Consequently, the zero-point energy cannot represent a real physical state and the question arises how to complement the normal ordering Hamiltonian of the electromagnetic field with a realistic vacuum description.
For that purpose, let us analyze what happens to the photon functions at zero frequency. For
, that is for
, the photon energy, vector potential, electric and magnetic fields vanish. However, the final state does not correspond to a perfectly empty space since the fundamental function
of the vector potential (7) still subsists and is expressed in both classical and quantum formalisms [16]-[18] [20] [31]
(15a)
(15b)
where in the quantum expression (15b) we have used the creation
and annihilation
non-Hermitian operators respectively for a single k-mode photon with circular polarization.
The expressions (15) represent the electromagnetic field ground state corresponding to the electromagnetic vacuum, a zero-energy field with electric potential nature filling all of the space.
For the first time, the classical electromagnetic theory is endowed with a vacuum state and QED with a vacuum representation depending on the photon creation and annihilation operators, complementing the normal ordering Hamiltonian.
Obviously, the phase parameter θ in the expressions (15) may take any value and consequently the electromagnetic vacuum is composed of all possible states
(16a)
(16b)
The electromagnetic vacuum states
, which can be called kenons (from κενo = vacuum), involve all the characteristic physical parameters for any k-mode of the electromagnetic field, that is wave vector, frequency and spin (helicity, corresponding to circular polarization).
It is extremely important noting that the kenons result naturally from the quantized vector potential without stating any postulates or advancing any hypothesis.
From the fundamental photon vector potential - energy quantum Equation (4) we obtain the equation governing the kenons [31]
(17)
where the angular frequency operator acting upon each mode k is .
The physical interpretation of Equation (17) is that real photons with vector potential
are generated by the action of the angular frequency operator
upon the kenons. In other words, photons are oscillations (precessions) of the electromagnetic vacuum states. Hence, the electromagnetic vacuum is composed of an infinite sea of kenons involving all modes k with circular polarizations.
An interaction Hamiltonian between kenons and electrons can be readily defined [14] [15] [20]
(18)
characterizing the spontaneous emission effect following which a kenon state is transformed to a real photon under the action of the angular frequency operator.
As about the Lamb shift, it is estimated exactly with the well-known method in QED since the calculation is based on the photon creation operator
.
In addition, it is straightforward to demonstrate that every particle accelerated in the electromagnetic vacuum with an acceleration γ experiences the Fulling-Davies-Unruh temperature [18]
(19)
where
is Boltzmann’s constant.
Finally, it has been shown that the fluctuations of the electromagnetic vacuum yield an energy density ~10−10 J·m−3, compatible with the astrophysical observations [30]. This result issues from the fact that the photon electric field magnitude is proportional to the square of the frequency [17] [20] [32].
Thus, the electromagnetic vacuum (16) is expressed in both classical and quantum formalisms complementing the quantum representation by associating a zero-energy vacuum field to the normal ordering Hamiltonian overcoming the zero-point energy singularity.
3. The Elementary Charge from the Electromagnetic Vacuum
We will show now that the elementary electron-positron charge is directly related to the photon quantized vector potential.
The photon volume Vk expands longitudinally along the propagation axis and corresponds to the volume in which the precession of the vector potential quantized amplitude takes place. We may now consider a closed loop in which the photon is curved. The mean electric field can be expressed by considering the photon electric field amplitude (13) weighed by the ratio of the total volume in all directions (
) to the characteristic volume
(20)
On the other hand, according to Coulomb law, the mean electric field created by a point charge considered at the center of the configuration writes
(21)
where
is the mean distance value in this topological configuration [33].
Equating the last equations, we draw the charge of this bounded photon state
(22)
which is that of the electron-positron charge e.
It is extremely important to underline here that the same exactly charge issues naturally from the energy normalization of a plane electromagnetic wave over a wavelength to a single photon energy [16] [19] [34]. This fundamental result formally signifies that, as the neutrino structure of photons [35] [36] has not been accepted, it is quite plausible physically either the electrons and positrons to be standing states of photons [33], or the photons to be composed of electron-positron pairs [37] [38].
Now, using the classical electromagnetic theory formalism the spin writes
(23)
with unit vectors.
Furthermore, it can be shown [18] [31] that the electron-positron mass
depends directly on the vacuum constant
and the elementary charge e
(24)
where
is the Bohr magneton.
We have considered here the plausible case that electrons and positrons may be standing states of photons, that is of kenons. Following the relations (22) and (24), the electron-positron charge and mass are directly related to the photon vector potential and consequently to the electromagnetic vacuum. Pairs of electrons-positrons can be created spontaneously and annihilate in the kenon sea. Hence, it seems that the kenons fluctuations may be at the origin of the vacuum polarization. With the same token photons are spontaneously created and annihilated in the kenon sea. The pic of the residual electromagnetic vacuum spontaneous emission should lie in the THz frequencies and consequently, the JWST might give an answer to that issue [30].
Finally, the vacuum physical characteristics, that is the electric permittivity
and magnetic permeability
are expressed through the fundamental physical constants
and the elementary charge e showing that they are intrinsic properties of the kenons
(25)
It is straightforward to verify that the last expressions give directly the velocity of light in vacuum
(26)
Thus, from the electromagnetic vacuum, the kenon sea, emerges the fundamental intrinsic vacuum properties as well as the vacuum polarization.
4. Elementary Particles from the Electromagnetic Vacuum.
The Mass-Charge Equivalence
From a historical point of view, we recall that Planck’s constant
was initially related experimentally to the energy of light quanta, considered as fundamental parts of the electromagnetic waves. However, although the characteristic physical origin of Planck’s constant lies to the quantization of the electromagnetic field it is quite intriguing to realize that the same constant is used in quantum physics for the description of all the other particles. This particular fact probably witnesses the inherent electromagnetic nature of the elementary particles.
In fact, the mass
of any particle-antiparticle i, other than the electron-positron, writes through the electromagnetic vacuum constant
and the electron-positron charge e [18] [31]
(27)
where
is the magneton of the particle i.
Note that from (22), e is the electron charge for
while it corresponds to the positron charge for
. Using the same sign convention and on the condition that magnetons are positive quantities the relation (27) implies that the masses of particles and antiparticles bear naturally opposite signs. This is in agreement with previous studies on matter and antimatter [39].
We also recall that from the very first experiments, the electron charge was considered conventionally as negative and consequently the particle masses appear also here as negative and those of the antiparticles as positives.
An approximate formalism for
related to the Bohr magneton writes
(28)
where
is the fine structure constant and ni is simply a positive integer [31].
Using the relations (6) and (28) the Equation (27) becomes
(29)
with the constants
and
.
The last relation means that the masses of all particles-antiparticles derive from the electromagnetic vacuum and are multiples of the vacuum constant
or multiples of the elementary charge e.
Hence, (29) expresses both the electromagnetic vacuum origin of the mass and the mass-charge equivalence.
The numerical application of (29) writes simply [31]
(30)
The last relation reproduces the masses of the known elementary particles, presented in Table 1, augmented and updated with respect to that published in [31].
Table 1. Elementary particle masses in MeV/c2 calculated using the relation (30) and comparison to the experimental values.
ni |
mi calculated |
mi experimental |
|δ(%)| |
Particle |
24 |
105.0 |
105.65 |
0.57 |
Muon (lepton), µ− |
31 |
135,6 |
134.97 |
0.46 |
Pion (meson), π0 |
32 |
140.0 |
139.57 |
0.30 |
Pion (meson), π+, π− |
113 |
494.5 |
493.68 |
0.17 |
Kaon (meson), K+, K− |
114 |
498,9 |
497.70 |
0.24 |
Kaon (meson), K0s, K0L |
125 |
547.1 |
547.75 |
0.11 |
Eta (meson), η0 |
177 |
774.7 |
775.4 |
0.11 |
Rho (meson), ρ0, ρ+, ρ− |
179 |
783.4 |
782.65 |
0.10 |
Omega (meson), ω |
204 |
892.8 |
891.66 |
0.08 |
Kaon (meson), K*+, K*− |
205 |
897.2 |
896.0 |
0.12 |
Kaon (meson), K*0 |
214 |
936.6 |
938.27 |
0.17 |
Proton (baryon), p+ |
215 |
940.9 |
939.56 |
0.15 |
Neutron (baryon), n⁰ |
219 |
958.4 |
957.66 |
0.07 |
Eta prime (meson), η' |
233 |
1019.7 |
1019.44 |
0.01 |
Phi (meson), φ |
255 |
1116.0 |
1115.68 |
0.03 |
Lambda (baryon), Λ0 |
271 |
1186.0 |
1189.37 |
0.28 |
Sigma (baryon), Σ+ |
272 |
1190.4 |
1192.6 |
0.18 |
Sigma (baryon), Σ0 |
274 |
1199.2 |
1197.45 |
0.14 |
Sigma (baryon), Σ− |
282 |
1234.2 |
1232 ± 2 |
0.17 |
Delta (baryon), Δ−, Δ0, Δ+, Δ++ |
300 |
1313.0 |
1314.8 |
0.13 |
Xi (baryon), Ξ0 |
302 |
1321.7 |
1321.7 |
0.00 |
Xi (baryon), Ξ− |
316 |
1383.0 |
1382.8; 1383.7 |
0.00 |
Sigma (baryon), Σ*+, Σ*0 |
317 |
1387.4 |
1387.2 |
0.00 |
Sigma (baryon), Σ*− |
350 |
1531.8 |
1531.8 |
0.00 |
Xi (baryon), Ξ0 resonance |
351 |
1536.2 |
1535.0 |
0.07 |
Xi (baryon), Ξ− resonance |
382 |
1671.9 |
1672.45 |
0.03 |
Omega (baryon), Ω− |
406 |
1776.9 |
1777.0 |
0.00 |
Tau (lepton), τ− |
426 |
1864.5 |
1864.8 |
0.01 |
D Meson, D⁰ |
450 |
1969.5 |
1968.4 |
0.05 |
Ds Meson, Ds+ |
458 |
2004.5 |
2006.97 |
0.12 |
D Meson, D+0 |
459 |
2008.9 |
2010.27 |
0.06 |
D Meson, D++ |
Continued
483 |
2113.9 |
2112.3 |
0.07 |
Strange D (meson), Ds*+ |
522 |
2284.6 |
2286.46 |
0.08 |
Lambda c (baryon), Λc+ |
560 |
2451.0 |
2452.9; 2453.7 |
0.08 |
Sigma c (baryon), Σc+, Σc0 |
561 |
2455.3 |
2453.9 |
0.05 |
Sigma c (baryon), Σc++ |
564 |
2468.4 |
2467.9 |
0.02 |
Xi c (baryon), Ξc+, Ξc0 |
565 |
2472.8 |
2471.0 |
0.07 |
Xi c (baryon), Ξc+, Ξc0 |
588 |
2573.5 |
2575.7 |
0.08 |
Xi c (baryon), Ξc+ resonance |
589 |
2577.9 |
2578.0 |
0.00 |
Xi c (baryon), Ξc0 resonance |
616 |
2696.0 |
2697.5 |
0.06 |
Omega c (baryon), Ωc0 |
632 |
2766.0 |
2765.9 |
0.00 |
Omega charm(baryon) Ωc*0 |
681 |
2980.5 |
2980.3 |
0.00 |
Charmed Eta(meson), ηc |
707 |
3094.3 |
3096.9 |
0.08 |
J/ψ (meson) |
804 |
3518.9 |
3518.9 |
0.00 |
Xi cc (baryon), Ξcc+ |
827 |
3619.5 |
3621.4 |
0.05 |
Xi cc (baryon), Ξcc++ |
1206 |
5278.3 |
5279.34; 5279.65 |
0.02 |
B Meson, B+, B0 |
1217 |
5326.4 |
5325.1 |
0.02 |
B* Meson, B*+, B*0 |
1226 |
5365.8 |
5366.3 |
0.00 |
Bs Meson, Bs0 |
1284 |
5619.7 |
5620.2 |
0.00 |
Lambda b0 (baryon), Λb0 |
1327 |
5807.9 |
5810 |
0.04 |
Sigma b (baryon), Σb+ |
1329 |
5816.6 |
5815.2 |
0.02 |
Sigma b (baryon), Σb− |
1332 |
5829.8 |
5830.3 |
0.00 |
Sigma bottom (baryon), Σb*+ |
1333 |
5834.1 |
5834.7 |
0.00 |
Sigma bottom (baryon), Σb*− |
1356 |
5934.8 |
5935.0 |
0.00 |
Xi’ b (baryon), Ξb' |
1360 |
5952.3 |
5952.3 |
0.00 |
Xi* b (baryon), Ξb* |
1361 |
5956.6 |
5955.3 |
0.02 |
Xi* b (baryon), Ξb *0 |
1381 |
6044.2 |
6046.0 |
0.02 |
Omega b (baryon), Ωb− |
1423 |
6228.0 |
6226.9 |
0.01 |
Xi b (baryon), Ξb |
1434 |
6276.1 |
6276 ± 4 |
0.00 |
Charmed B Meson, Bc+ |
2125 |
9300.5 |
9300 ± 40 |
0.00 |
Eta bottom (meson), ηb |
2161 |
9458.0 |
9460.3 |
0.02 |
Ypsilon (meson), Y |
The integer ni characterizing the particle masses in (29) entails that the electromagnetic vacuum must be endowed with a complex structure involving specific quantum states that might be related to the string theory.
In addition, quarks and antiquarks are characterized by fractional elementary charges, e/3 and 2e/3, and could also correspond to particular states of the electromagnetic vacuum. Therein, it is interesting to underline that the value 4.3767 MeV/c2 in the relation (30) corresponds to the mass of the down quark which is estimated to be roughly 4.7 ± 0.6 MeV/c2.
Pairs of particles-antiparticles can be created spontaneously and annihilated in vacuum due to the kenons fluctuations. However, the probability for this mechanism to occur is much weaker than that of electrons-positrons pairs for which the energy involved in the fluctuation process is much lower. The residual spontaneous generation-annihilation of matter-antimatter in space by the electromagnetic vacuum fluctuations may be in thermodynamic equilibrium at the temperature ~3 K and consequently at the origin of the cosmic microwave background.
Finally, the overall conclusion of the above is that the electron-positron charge derives from the electromagnetic vacuum and is directly related to photons through the vector potential. The particles-antiparticles masses are quantum states of the vacuum field originating from the elementary charges and their magnetic moment.
5. The Gravitational Constant and the Electromagnetic Vacuum
It is well-known that Planck’s length lp = 1.616 × 10−35 m corresponds physically to the shorter possible wavelength of a single photon. Consequently, it characterizes the “granularity” of the electromagnetic vacuum. Considering lp it has been shown that the gravitational constant G is expressed exactly through the electromagnetic vacuum constants
,
and
[17] [18] [31]
(31)
Assuming that Newton’s gravitational law is valid at the elementary particle scale, the equivalence between Coulomb’s electrostatic law and Newton’s gravitational law is straightforward [31]
(32)
where
is a dimensionless parameter depending on the magnetons of the interacting particles. A similar result has also been obtained adopting a different approach [38].
The gravitational potential between a large number of particles is expressed uniquely through the QED constants
, e and the magnetons
showing the electromagnetic nature of the gravitational interaction
(33)
Now, the factor
in (31) corresponds to the linear density of the vacuum states with respect to the granularity of the electromagnetic vacuum in
steradiants.
Consequently, a fundamental concept arises straightforward related to the gravitational constant dependence on the electromagnetic vacuum density. In fact, the relation (31) writes in a more general expression
(34)
where
is the density of states of the electromagnetic vacuum.
We draw that the gravitational constant G is expressed through electromagnetic constants and derives from the electromagnetic vacuum density of states. Consequently, according to the variation of the kenons density in space it may not be a universal constant. This could provide a direct explanation of the gravitational anomalies observed on a quite large numbers of galaxies, which conflict with Newtonian dynamics and general relativity [40]. On the other hand, following many detailed studies over 193 high-quality disk galaxies it also well-established today with a high degree of statistical accuracy that the modified Newtonian dynamics models are not valid [41]. Consequently, the local variation of the gravitational constant due to the electromagnetic vacuum density could give an explanation for those astrophysical anomalies. Furthermore, the radiation pressure of the electromagnetic vacuum might be at the origin of gravitation (Electromagnetic Push Gravity) and would be interesting to be investigated experimentally [31] [42]. In addition, the opposite mass signs corresponding to matter and antimatter following relation (29) may easily interpret Hubble’s law as well as the cosmic acceleration in agreement with recent astrophysical simulations [43].
Finally, the Breit-Wheeler effect [44], according to which high energy photons collisions give birth to electron-positrons pairs, has been confirmed [45] [46] while advanced experiments [47] [48] managed to create a high number of electron-positrons pairs using γ photon collisions.
Thus, the experimental evidence has demonstrated that matter-antimatter can be created from photons opening new perspectives for further investigations in order to understand whether the universe is entirely composed of light.
6. Epilogue
The electromagnetic vacuum is a real universal field, composed of kenons states with electric potential nature. It has both classical and quantum representations and is at the origin of the fundamental intrinsic vacuum properties, such as the electric permittivity, magnetic permeability and vacuum polarization.
The electromagnetic waves, photons in quantum theory, are simply kenons oscillations.
Electrons and positrons are bound topological configurations of photons, that is of kenons.
The elementary charge (positive and negative) results precisely from the kenons and is proportional to the electromagnetic vacuum amplitude ξ.
The masses of all the elementary particles can be expressed as multiples of the vacuum quantization amplitude ξ and thus of the elementary charge e.
It is drawn that matter and antimatter in the universe issue from kenons and are composed of standing states of light.
The electromagnetic nature of particles implies the electromagnetic nature of gravitation and yields the equivalence of Newton’s gravitational to Coulomb’s electrostatic law.
Considering Planck’s length as the fundamental granularity of the electromagnetic vacuum, we have shown that the gravitational constant has electromagnetic nature, it’s inversely proportional to the square of the kenons density in space and consequently might not be a universal constant.