Gravitation as a research area investigates the fundamental interaction responsible for the attraction between masses, spanning classical, relativistic, and quantum regimes. It encompasses the study of Newtonian gravity for weak-field, low-velocity systems, general relativity for strong-field and cosmological phenomena, and experimental and observational tests across scales from laboratory to astrophysical and cosmological. The field also includes gravitational wave physics, black hole and neutron star dynamics, precision tests of the equivalence principle, alternative and modified gravity theories, and efforts toward quantum gravity, such as loop quantum gravity, string-inspired models, and semiclassical approaches, with strong connections to cosmology and high-energy theory.
A team of physicists has uncovered a surprising new way to explore one of science's greatest challenges: uniting the two fundamental theories that explain how our universe works—Einstein's theory of gravity and quantum ...
General Physics
May 12, 2025
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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 ...
General Physics
May 5, 2025
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During the latter part of the 20th century, string theory was put forward as a unifying theory of physics foundations. String theory has not, however, fulfilled expectations. That is why we are of the view that the scientific ...
How gravity causes a perfectly spherical ball to roll down an inclined plane is part of the elementary school physics canon. But the world is messier than a textbook.
General Physics
Mar 27, 2025
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In the years since Miguel Alcubierre came up with a warp drive solution in 1994, you would occasionally see news headlines saying that warp drives can work. And then a few months later you'll see that they've been ruled out. ...
Astronomy
Mar 24, 2025
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In 1994, Miguel Alcubierre was able to construct a valid solution to the equations of general relativity that enable a warp drive. But now we need to tackle the rest of relativity: How do we arrange matter and energy to make ...
Space Exploration
Mar 24, 2025
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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 ...
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
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Traditional black holes, as predicted by Albert Einstein's theory of General Relativity, contain what are known as singularities, i.e., points where the laws of physics break down. Identifying how singularities are resolved ...
General Physics
Feb 12, 2025
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