Archive for the ‘cosmology’ category: Page 388
Apr 22, 2016
Stephen Hawking: “History and memories could be illusions” because of black holes
Posted by Sean Brazell in categories: cosmology, particle physics
Welcome to our imaginary existential nightmare…
Stephen Hawking recently discussed black holes and the often contradictory properties associated with them during a lecture at Harvard. The Harvard Gazette said recently that Hawking specifically explained that, if information is really lost in black holes, then we will have been misunderstanding not only black holes, but the science of determinism, for the last 200 years.
Hawking said that particles that fall into a black hole “can’t just emerge when the black hole disappears.” Instead, “the particles that come out of a black hole seem to be completely random and bear no relation to what fell in. It appears that the information about what fell in is lost, apart from the total amount of mass and the amount of rotation.”
Apr 21, 2016
Hunting light dark matter with gamma rays
Posted by Andreas Matt in category: cosmology
Apr 18, 2016
Large Hadron Collider(LHC) Could Detect Extra Dimensions
Posted by Andreas Matt in categories: cosmology, quantum physics
Large Hadron Collider (LHC) Could Detect Extra Dimensions.
A recent paper published in Physics Letters B has raised the prospect that the Large Hadron Collider (LHC) could mark a discovery that would put its earlier achievements with the #HiggsBoson in the shade. The authors of the recent published paper propose it could spot mini black holes. Such a discovery would be a matter of massive importance on its own, but might be a sign of even more significant things. Few notions from theoretical physics capture the public imagination as much as the “many-worlds theory,” which suggests an infinite number of universes that vary from our own in ways large and small. The notion has delivered great fodder for science fiction novelists and comedians. Nevertheless, according to Professor Mir Faizal from the University of Waterloo, “Normally, when people think of the multiverse, they think of the many-worlds interpretation of quantum mechanics, where every possibility is actualized,” he told Phys.org. “This cannot be tested and so it is philosophy and not science.” Nonetheless, Faizal reflects the test for a different type of parallel universes nearly within our reach. Faizal says “What we mean is real universes in extra dimensions. As gravity can flow out of our universe into the extra dimensions, such a model can be tested by the detection of mini black holes at the LHC.”
#ParticlePhysics #Extradimensions #LHC #CERN #TheoreticalPhysics #BlackHoles
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Apr 18, 2016
Black Hole ‘Firewalls’ Pits Einstein’s Theory Against Quantum Mechanics
Posted by Karen Hurst in categories: cosmology, quantum physics
When Black Hole Firewalls pit theory of relativity against Quantum Mechanics.
A worldwide study reconciles the theory of black hole “firewalls,” which pits the two theories of general relativity and quantum mechanics against one another.
In the new, free-for-all era of dark matter research, the controversial idea that dark matter is concentrated in thin disks is being rescued from scientific oblivion.
Apr 15, 2016
New Research Suggests That Time Runs Backwards Inside Black Holes
Posted by Andreas Matt in categories: cosmology, physics
A new research paper published in Physical Review Letters has brought forward a significant new understanding of general relativity laws, and has found some strange physics taking place inside black holes. Specifically, that the direction of time could be reversed within them. Several physical procedures are perfectly symmetric in time. Take a pendulum for instance. If someone shows you a video of a pendulum swinging, you cannot differentiate if the video is actually moving forward or backward. But some processes are not symmetric at all. We can tell that a pendulum will ultimately slow because of friction and we know that it was triggered at some point, so we can give a temporal direction to physics. The directionality of time and our view of it was called the “Arrow of Time” by British astronomer Arthur Eddington, and it has been connected to the entropy of the cosmos.