Somewhere between the microscopic realm of elementary particles and the macroscopic world of human beings, something strange ...

Loop Quantum Cosmology (LQC) applies the non-perturbative techniques of loop quantum gravity to homogeneous cosmological models, yielding a quantum replacement of the classical big-bang singularity by ...

The gauge bosons of the standard model of particle physics are responsible for three of the four known forces in the universe, conveyed through the exchange of virtual bosons. In electromagnetism, the ...

Quantum gravity seeks a unified framework reconciling general relativity’s description of spacetime with quantum mechanics. Leading approaches include loop quantum gravity, spin-foam models and group ...

C arlo Rovelli, a theoretical physicist who has made significant contributions to the physics of space and time and a ...

Large masses – such as a galaxy – curve space-time. Objects move along a geodesic. If we take into account that space-time itself has quantum properties, deviations arise (dashed line vs. solid line).

Beam me up, Einstein. The world’s most powerful atom laser could one day be sent into space to probe the mysteries of general relativity and perhaps offer clues to the long-sought connection between ...

The largest survey ever conducted among physicists worldwide reveals surprisingly little agreement on some of the field’s ...

Gravitons, the particle of quantum gravity, may be impossible to detect. To progress to the next level in understanding reality, we need to combine quantum mechanics and Einstein’s general relativity.