icarus2
Registered Senior Member
Sphere Theory: Beyond String Theory, Completing Quantum Gravity!
For decades, we have been working to perfect the theory of quantum gravity, exploring radical new ideas such as extra dimensions (string theory) or the quantization of spacetime itself (loop quantum gravity). Moreover, significant unresolved problems related to gravity—such as the divergence problem, the singularity problem, the cause or driving mechanism of inflation, and the problem of cosmic accelerated expansion—span from the smallest to the largest scales.
This strongly suggests that we may be missing something crucial in our understanding of gravity.
Although these four representative gravity-related problems (Divergence, Singularity, Inflation, and Dark Energy) appear to exist at different scales and in different contexts, they could, in fact, be manifestations of a single underlying issue related to gravity.
That issue is the necessity of antigravity or repulsive forces. If antigravity exists in the context of gravity, all four of these problems could be resolved. If this antigravity is scale-dependent, it could address issues across different scales.
I believe the physical concept that mainstream physics is overlooking is the gravitational self-energy or binding energy inherent to an object. The effective source of gravity is not the free-state mass (M_fr) but the equivalent mass (M_eq) corresponding to the total energy of the object. And this equivalent mass includes the gravitational self-energy (negative binding energy) that has a negative value. Since gravitational self-energy is negative energy, it satisfies the anti-gravity requirement. Also, since it is scale-dependent, it can solve the gravity problem from the smallest scale to the largest scale.
By accounting for this gravitational self-energy, we can resolve the four aforementioned problems and complete a theory of quantum gravity.
1. Why "Sphere Theory"?

The concept of gravitational self-energy(U_gs) is the total of gravitational potential energy possessed by a certain object M itself. Since a certain object M itself is a binding state of infinitesimal mass dMs, it involves the existence of gravitational potential energy among these dMs and is the value of adding up these. M = ΣdM. The gravitational self-energy is equal to the minus sign of the gravitational binding energy. Only the sign is different because it defines the gravitational binding energy as the energy that must be supplied to the system to bring the bound object into a free state.
*To understand the basic principle, we can look at the problem in Newtonian mechanics, and for the actual calculation, we can use the binding energy formula of general relativity to find the value.
U_gs=-(3/5)(GM^2)/R
In gravitationally bound systems, changes in configuration (e.g., orbital reduction) lead to a decrease intotal energy and equivalent mass due to energy radiation, as seen in celestial mechanics. Although potential energy changes to kinetic energy, in order to achieve a stable bonded state, a part of the kinetic energy must be released to the outside of thesystem. As a result, this leads to a decrease in the equivalent mass of the system.
In the case of a spherical uniform distribution, the total energy of the system, including gravitational potential energy (binding energy), is
E_T = Σm_ic^2 + Σ-(Gm_im_j/r_ij) = Mc^2 - (3/5)(GM^2/R)
In the general case, the value of total gravitational potential energy (gravitational self-energy) is small enough to be negligible, compared to mass energy Mc^2.
However, as R gets smaller, the absolute value of U_gs increases. For this reason, we can see that U_gs is likely to offset the mass energy at a certain radius. The mass defect effect due to binding energy has already been demonstrated in particle physics.
Thus, looking for the size in which gravitational self-energy becomes equal to rest mass energy,

At the critical radius R_gs, the negative gravitational self-energy cancels out the positive mass energy, so the total energy becomes zero, and therefore the gravity becomes zero.
R_gs = (3/5)GM/c^2
(*For the detailed calculation based on general relativity, please refer to the paper.)

M_eq=M_fr - M_gs = M_fr - |U_gs|/c^2
M_fr is the free-state mass, -M_gs is the equivalent mass of gravitational self-energy (U_gs). G_N is Newton's gravitational constant, G(k) is running gravitational coupling.
G(k)=G_N(M_eq/M_fr)) = G_N(1 - M_gs/M_fr) = G_N(1- |U_gs|/M_frc^2)
The integration of the gravitational binding function is not analytical. Using the first-term approximation, we obtain the value R_{gs-GR-1st} ~ 1.16G_NM_fr/c^2 ~ 0.58R_S. If we calculate the integral itself numerically and apply the virial theorem to it, we obtain the value R_{gp-GR-vir} ~ 1.02G_NM_fr ~ 0.51R_S. Since the process in which actual celestial bodies contract gravitationally to become black holes is very complex, these values may be slightly different.
The important thing here is not the exact value, but the fact that there exists a actual critical radius R_gs where the negative gravitational self-energy offsets the positive mass energy. In addition, these R_gs are estimated to be GM/c^2 ~ 2GM/c^2.
R_gs ~ GM/c^2
What this critical radius R_gs means is that,
If the object were to shrink further (R<R_gs), it would enter a negative energy state. This generates a repulsive gravitational force or effect ('anti-gravity'), which prevents any further collapse.
Therefore, R_gs acts as an minimal radius. Nothing can be stably smaller. (This is temporarily possible, however.) This replaces the abstract 'point' particle with a fundamental, volumetric 'sphere'.
Where QFT can be viewed as a “Point Theory” and String Theory as a “String Theory”, "Sphere Theory" is built upon the physical principle that all fundamental entities are not mathematical idealizations but physical objects possessing a three-dimensional volume.
This framework, which can also be more descriptively referred to as the Gravitational Self-Energy Framework (GSEF), does not postulate new entities but rather rigorously applies a core tenet of general relativity: that all energy, including an object’s own negative self-energy, acts as a gravitational source.
#Paper: Sphere Theory: Completing Quantum Gravity through Gravitational Self-Energy
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