ESA
If gravity arises from entropy, scientists could unite Einstein’s general relativity with the quantum kingdom.
A new theory of gravity can unite Einstein’s theory of general relativity and quantum mechanics – And it can be the key to solving some of the deepest mysteries in the universe, such as dark matter and dark energy.
Since the early twentieth century, Einstein’s theory of general relativity has been essential for a more accurate understanding of gravity.
Theory explains how massive objects deform spacetime; This curvature the force are understood as gravity.
However, it reinforces the, while general relativity proved to be effective in large cosmic scales, cannot explain phenomena such as dark matter and dark energy -which represent about 95% of the mass-energy content of the universe.
Quantum mechanics controls the behavior of the smallest particles of the universe, but it has been shown to be incompatible with general relativity, particularly regarding the understanding of gravity at the quantum level.
One incompatibility that originated the search for a “Theory of Everything”. A fruitless demand so far.
But a recent seems to go around this situation: a new picture is presented for the Quantum gravity – which could after all emerge from “Quantum Relative Entropy”a concept used to measure dissimilarity between quantum states.
This new theory can provide a way to reconcile the apparently incompatible ideas of general relativity and quantum mechanics.
The analysis is based on the description of the space-time of general relativity, treating spacetime geometry as a quantum operator.
This model suggests a new “ENTROPIC ACTION”, modifying Einstein’s equations.
Interestingly, in areas of low energy and minimal curvature, this approach would replicate the behavior provided for by general relativity.
One of the most significant aspects of this theory is its ability to address dark energy and dark matter. The study provides for a small positive cosmological constantwhich could better explain the accelerated expansion of the universe driven by dark energy.
In addition, it introduces the idea of a “campo-G”, An auxiliary field that acts as a Lagranician multiplier and could potentially explain the gravitational effects attributed to dark matter.
“This work proposes that Quantum gravity has an entropic origin and suggests that Campo-G can be a candidate for dark matter. In addition, the emerging cosmological constant predicted by our model can help solve the discrepancy between theoretical predictions and experimental observations of the expansion of the universe, ”Ginestra Bianconi, author of the study.
