Quantum gravity is a research area in theoretical physics that seeks a consistent, predictive framework unifying general relativity with quantum mechanics by quantizing the gravitational field. It investigates regimes where spacetime curvature and quantum effects are simultaneously significant, such as near singularities and at the Planck scale, and aims to resolve conceptual tensions including the problem of time, the nature of spacetime microstructure, and black hole information dynamics. Major approaches include string theory, loop quantum gravity, asymptotic safety, causal dynamical triangulations, and emergent gravity scenarios, each proposing distinct mathematical formalisms and testable phenomenological implications for high-energy, cosmological, or precision-gravity experiments.
Ever since general relativity pointed to the existence of black holes, the scientific community has been wary of one peculiar feature: the singularity at the center—a point, hidden behind the event horizon, where the laws ...
Astronomy
May 6, 2025
4
883
At long last, a unified theory combining gravity with the other fundamental forces—electromagnetism and the strong and weak nuclear forces—is within reach. Bringing gravity into the fold has been the goal of generations of ...
General Physics
May 5, 2025
7
2309
Teleology is the idea that some processes in nature are directed toward a goal or an end. Today, it is commonly asserted that teleology is a remnant of antiquated ways of thinking about causation, and that it is not compatible ...
Quantum gravity is the missing link between general relativity and quantum mechanics, the yet-to-be-discovered key to a unified theory capable of explaining both the infinitely large and the infinitely small. The solution ...
General Physics
Mar 20, 2025
0
239
I've long been fascinated by the fundamental mystery of our universe's origin. In my work, I explore an alternative to the traditional singularity-based models of cosmology. Instead of a universe emerging from an infinitely ...
Physics has a problem—their key models of quantum theory and the theory of relativity do not fit together. Now, Dr. Wolfgang Wieland from Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU) is developing an approach that ...
Quantum Physics
Mar 13, 2025
0
136
Ask almost any physicist what the most frustrating problem is in modern-day physics, and they will likely say the discrepancy between general relativity and quantum mechanics. That discrepancy has been a thorn in the side ...
Quantum Physics
Mar 10, 2025
0
129
For over a century, physicists have grappled with one of the most profound questions in science: How do the rules of quantum mechanics, which govern the smallest particles, fit with the laws of general relativity, which describe ...
General Physics
Mar 6, 2025
0
157
In a new Physical Review Letters study, researchers propose an experimental approach that could finally determine whether gravity is fundamentally classical or quantum in nature.
In a new study published in Physical Review D, Professor Ginestra Bianconi, Professor of Applied Mathematics at Queen Mary University of London, proposes a new framework that could revolutionize our understanding of gravity ...
General Physics
Mar 4, 2025
8
1363
