Physicists propose test for loop quantum gravity
Could the combination of general relativity and quantum mechanics lead to spintronics?
Time travel theory avoids grandfather paradox
Revised theory of gravity doesn't predict a Big Bang
Does weak equivalence break down at the quantum level?
New Law of Physics Could Explain Quantum Mysteries
Quantum steps towards the Big Bang
(Phys.org) —Present-day physics cannot describe what happened in the Big Bang. Quantum theory and the theory of relativity fail in this almost infinitely dense and hot primal state of the universe. Only ...
Physicists use dysprosium to put bounds on maximum speed of electrons
Albert Einstein's assertion that there's an ultimate speed limit – the speed of light – has withstood countless tests over the past 100 years, but that didn't stop University of California, Berkeley, postdoc Michael Hohensee ...
White dwarf star throws light on possible variability of a constant of Nature
An international team led by the University of New South Wales has studied a distant star where gravity is more than 30,000 times greater than on Earth to test its controversial theory that one of the constants ...
New experiments set to detect gravitational waves
Einstein's gravity theory passes toughest test yet: Bizarre binary star system pushes study of relativity to new limits
(Phys.org) —A strange stellar pair nearly 7,000 light-years from Earth has provided physicists with a unique cosmic laboratory for studying the nature of gravity. The extremely strong gravity of a massive ...
Curtains down for the black hole firewall paradox: Making gravity safe for Einstein again
Research by scientists at the University of York has revealed new insights into the life and death of black holes.
Dark energy alternatives to Einstein are running out of room
(Phys.org)—Research by University of Arizona astronomy professor Rodger Thompson finds that a popular alternative to Albert Einstein's theory for the acceleration of the expansion of the universe does not ...
Astronomers discover star racing around black hole at Milky Way center
UCLA astronomers report the discovery of a remarkable star that orbits the enormous black hole at the center of our Milky Way galaxy in a blistering 11-and-a-half years—the shortest known orbit of any star ...