Unified field theory, in particle physics is an attempt to describe all fundamental forces and the relationship between elementary particles in terms of a single theoretical framework   . In physics, fields that mediate interactions between separate objects can describe forces. In the mid 19th century James Clerk Maxwell formulated the first field theory in his theory of electromagnetism  . Then, in the early part of the 20th century, Albert Einstein developed general relativity, a field theory of gravitation   . Later, Einstein and others attempted to construct a unified field theory in which electromagnetism and gravity would emerge as different aspects of a single fundamental field   . They failed, and to this day gravity remains beyond attempts at a unified field theory.
At subatomic distances, fields are described by quantum field theories, which apply the ideas of quantum mechanics to the fundamental field. In the 1940s quantum electrodynamics (QED), the quantum field theory of electromagnetism, became fully developed   .
The electroweak interaction is the unified description of two of the four known forces: electromagnetism and the weak interaction   . Although these two forces appear very different at everyday low energies, the theory models them as two different aspects of the same force.
It is generally believed that a successful grand unified theory (GUT) will still not include gravity. The problem here is that theorists do not yet know how to formulate a workable quantum field theory of gravity based on the exchange of a hypothesized graviton    . The current quest for a unified field theory is largely focused on superstring theory and in particular, on an adaptation known as M-theory  .
One limitation with Einstein’s work was at first his rejection, and then his ignorance of quantum theory (which he acknowledged as the years went on). But even today, scientists who are familiar with quantum theory are also having difficulty coming up with a unified theory.
There are many approaches being considered, but the most promising, according to APS, involves string theory. The theory “describes all elementary particles as vibrating strings, with different modes of vibration producing different particles”.
In the 1980s, physicists (led by John Schwarz and Michael Green) concluded that string theory could work because of its vibrations. Similar to how a violin plays different notes, the theory went, different vibrations in strings of nature would create different particles. In the mid-1990s, Edward Witten proposed more exact theories of string theory, now called M-theory. His work expanded string theory dimensions from six to seven, and showing new ingredients of the theory (including branes, or membrane-like objects in various dimensions).
Work in this field is very much emerging, but researchers are trying to learn more physical properties of the string by studying the subatomic particles produced in particle accelerators, such as the Large Hadron Collider. Among other directions, the LHC experiments are intended to look for super symmetry, or a supposed mathematical property where every particle species would have a partner particle species.
Physicists caution that a weakness of string theory is it has not yet been confirmed by data. There are also other approaches to unified field theory, such as quantum gravity, which tries to describe gravity in the terms of quantum mathematics.
We have discovered that a de Broglie matter field is a coupled solution to electromagnetism, quantum mechanics, gravity and the strong force. For
Given a mass, m, moving in a clockwise, circular orbit of constant radius, r, at a constant velocity,
, and moving at
in the positive z-direction,
where is the wavelength of the de Broglie wave, h is Planck’s constant  and p is the magnitude of the orbital momentum of the mass. The de Broglie orbital condition  is:
In the inertial frame of the mass, define the following wave fields for the rotating wave packet:
In the sections that follow, only the energy due to the rotating fields will be considered.
The divergence of in cylindrical coordinates is:
The curl of is:
The divergence of is:
the curl of is:
Define the density, , with the equation:
Define the current density, , with the equation:
Based on Equations (4) and (5), (13) becomes:
Equations (12) and (14) satisfy the equation of continuity  :
If we let the permittivity, and the permeability, be such that:
(This is explained in the Discussion section.)
So the speed of light is:
Then the system of field equations become:
These are Maxwell’s equations  for an electromagnetic field. Some additional support for these equations is provided by Ampere’s law  :
where I is the enclosed current.
Equation (22) is the de Broglie condition. From (20), we see that the enclosed current is:
The radiation flux of the electromagnetic field is given by the Poynting vector  :
The energy density  is:
The conservation law for the field energy  is:
Equation (28) confirms the current density. The energy circulates through the electric field. Therefore, the total energy, stored in the field is due to :
Observe that in this field:
This is explained in the Discussion section.
Let the scalar potential be :
The gradient of is given as:
The vector potential, , is given by the equation:
Therefore, we must have:
Equation (35) reduces to:
from which we can deduce:
We see that:
So, this is a Coulomb gauge  .
2.2. Quantum Mechanics
Since the de Broglie wave is a “matter” wave, the quantum mechanical wave function of the de Broglie wave packet is simply the phase wave:
This function is normalized since:
The traditional Schrodinger equation  is:
However, for this field, . Therefore, the equation becomes:
From the de Broglie condition, we get . The energy eigenvalue derives from:
Consequently, the total energy of the system is given by the Hamiltonian, H:
The potential energy, U, is the magnetic energy stored in the field: . Therefore:
and the Schrodinger Equation (44) is satisfied.
2.3. General Relativity
We can calculate the field tensor  :
where and . This results in:
The covariant form of Maxwell’s equations is as follows. The inhomogeneous equations are:
where is the four-current. The homogeneous equations are:
The scalar curvature, R, can be written as:
The contravariant metric tensor  is:
The relationship between the Ricci curvature tensor  , and the scalar curvature is given by:
The covariant metric tensor is:
The covariant field tensor can be derived from:
The contravariant stress-energy tensor  , can be derived from the following:
where L is the Lagrangian density:
The covariant form of the stress energy tensor is derived from:
Substitution of the stress tensor (62), the metric tensor (57) and the scalar curvature (55) into the Einstein equations  allows one to determine the Ricci curvature tensor, . The Einstein equations are given as:
with and G as the cosmological and gravitational constants, respectively. But since we are using Planck units, and because the density is one dimensional, the Einstein equations for this system become:
2.4. The Strong Force
The Yukawa potential  for the strong force is given as:
where, for the rotating de Broglie wave packet,
and R is the range:
But and , so (67) becomes:
Equations (65) and (68) can be used to derive:
However, the Yukawa potential is a screened Coulomb potential and for this system we must use the scalar “electric” potential given in Equation (31). Consequently, the modified Yukawa potential for the rotating de Broglie wave is:
In this Planck units UFT theory, c = 1. Since E/B = c, this implies that E = B. This follows from the equivalence: (In terms of relativity, ct is the temporal spatial coordinate, but in this case, c = 1).
Along with , the equivalence: , ensures the proper energy for the ground state: n = 1. That is, the total energy of the orbiting mass equals the total energy of the rotating field for n = 1. In addition, makes the quantum mechanics of the field consistent.
Note that in this system, because the density is one dimensional, the “electric” field constant is given as:
Consequently, unlike typical Planck units, in which , in this case, .
We let the mass orbiting in the r-θ plane move in the positive z-direction at approximately the speed of light . Because of time dilation, ct remains virtually constant and we select t such that .
The magnitude of the gravitational field is just the curvature:
So, the divergence of the electric field is the magnitude of the gravitational field:
In this theory, the reduced Planck’s constant becomes:
But in Planck units, . Consequently, the total energy is:
The “charge” density for this theory is 1 wave packet per orbit or:
So the “charge” is (i.e. 1 wave packet), so that we can write:
But the charge of an electron in Planck units is:
where is the fine structure constant. Clearly, despite the fact that this UFT includes an “electromagnetic” field, it does not actually incorporate electrons.
We can show that is typically extremely small and r and m are typically extremely large. The de Broglie condition is:
In SI units, we have:
Let and . Thus, without units, we have:
In Planck units, , so scaling yields:
Consequently, in Planck units, we must have:
And since , we have:
We can demonstrate the effects of relativistic speed as follows. Let , where is a small perturbation. Then we can calculate the time dilation as:
Since is negligible and we have:
In Planck units, . So we have:
Mass is augmented by relativity in a similar fashion:
And since , we have:
As mentioned in the introduction, the weak force combines with the electromagnetic force to become the electro-weak force at high energies. Therefore, the r-θ, planar rotating de Broglie wave packet moving at in the positive z direction unifies all four forces and quantum mechanics with the stipulation that the theory uses Planck units, with and .
Future work will be focused on showing that the unified de Broglie field can absorb and radiate gravitons or spin 2 particles.
 Robertson, D.S. (2007) Goedel’s Theorem, the Theory of Everything, and the Future of Science and Mathematics. Complexity, 5, 22-27.
 Richter, F., Florian, M. and Henneberger, K. (2008) Poynting’s Theorem and Energy Conservation in the Propagation of Light in Bounded Media. Europhysics Letters, 81, 67005.