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.
Waterloo scientists have developed a new way to understand how the universe began, and it could change what we know about the Big Bang and the earliest moments of cosmic history. Their work suggests that the universe's rapid ...
General Physics
Mar 29, 2026
7
564
General relativity stands as one of the bedrock theories in modern physics. Its strange view of relative time and space has been confirmed by countless experimental and observational tests, from rotational frame dragging ...
Astronomy
Mar 29, 2026
2
85
The mystery of dark matter—unseen, pervasive, and essential in standard cosmology—has loomed over physics for decades. In new research, I explore a different possibility: Rather than postulating new particles, I propose that ...
For those who watch gravitational waves roll in from the universe, GW250114 is a big one. It's the clearest gravitational wave signal from a binary black hole merger to date, and it gives researchers an opportunity to test ...
General Physics
Jan 29, 2026
4
409
Time feels like the most basic feature of reality. Seconds tick, days pass and everything from planetary motion to human memory seems to unfold along a single, irreversible direction. We are born and we die, in exactly that ...
Quantum Physics
Jan 29, 2026
62
386
A team of researchers led by the University of Warwick has developed the first unified framework for detecting "spacetime fluctuations"—tiny, random distortions in the fabric of spacetime that appear in many attempts to unite ...
General Physics
Jan 21, 2026
5
175
Quantum theory and Einstein's theory of general relativity are two of the greatest successes in modern physics. Each works extremely well in its own domain: Quantum theory explains how atoms and particles behave, while general ...
When two black holes merge or two neutron stars collide, gravitational waves can be generated. They spread at the speed of light and cause tiny distortions in space-time. Albert Einstein predicted their existence, and the ...
General Physics
Dec 16, 2025
8
246
It is something like the "Holy Grail" of physics: unifying particle physics and gravitation. The world of tiny particles is described extremely well by quantum theory, while the world of gravitation is captured by Einstein's ...
General Physics
Dec 2, 2025
3
487
In 1980, Stephen Hawking gave his first lecture as Lucasian Professor at the University of Cambridge. The lecture was called "Is the end in sight for theoretical physics?"
General Physics
Nov 12, 2025
13
182
