Posted in cosmology, particle physics
The correspondence between fermions and bosons of identical mass that is postulated to have existed during the opening moments of the big bang and that relates gravity to the other forces of nature… See the full definition.
The theory, which emerged in the 1970s as a way to unify the fundamental forces of nature, has profoundly shaped the landscape of particle physics.
M-theory is a theory in physics that unifies all consistent versions of superstring theory. The existence of such a theory was first conjectured by Edward Witten at a string theory conference at the University of Southern California in the Spring of 1995. Witten’s announcement initiated a flurry of research activity known as the second superstring revolution.
Prior to Witten’s announcement, string theorists had identified five versions of superstring theory. Although these theories appeared, at first, to be very different, work by several physicists showed that the theories were related in intricate and nontrivial ways. In particular, physicists found that apparently distinct theories could be unified by mathematical transformations called S–duality and T–duality. Witten’s conjecture was based in part on the existence of these dualities and in part on the relationship of the string theories to a field theory called eleven-dimensional supergravity.
Although a complete formulation of M-theory is not known, the theory should describe two- and five-dimensional objects called branes and should be approximated by eleven-dimensional supergravity at low energies. Modern attempts to formulate M-theory are typically based on matrix theory or the AdS/CFT correspondence.
Teenage climate activist responds to criticism, saying ‘when haters go after your looks and differences … you know you’re winning’
Scientists have identified the mechanism that lets geckos regrow severed limbs, and they may get it to work in humans.
Posted in media & arts
Here’s a demo of a rendering engine I’ve been working on that allows for non-euclidean geometry.
Source Code and Executable:
https://github.com/HackerPoet/NonEuclidean
Music:
“Automatic Loving” — Dee Yan-Key
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This would be good for hoverboards and aircrafts.
Physicists have discovered a novel quantum state of matter whose symmetry can be manipulated at will by an external magnetic field. The methods demonstrated in a series of experiments could be useful for exploring materials for next-generation nano- or quantum technologies.
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