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Latest Feynman diagram Stories

2012-03-19 05:10:56

New technique could open the door to practical superconductor applications, as well as to solving difficult 'many-body' problems in high-energy physics, condensed matter and ultra-cold atoms Combining known factors in a new way, theoretical physicists Boris Svistunov and Nikolai Prokof'ev at the University of Massachusetts Amherst, with three alumni of their group, have solved an intractable 50-year-old problem: How to simulate strongly interacting quantum systems to allow accurate...

7fec1dafa8ccdd82291012e054872b951
2009-08-17 19:45:00

Quantum mechanics and Einstein's theory of general relativity are both extremely accurate theories of how the universe works, but all attempts to combine the two into a unified theory have ended in failure. When physicists try to calculate the properties of a quantum theory of gravity, they find quantities that become infinite -- infinities that are so bad they can't be removed by mathematical gambits that work in other areas of physics.Now, Zvi Bern, John Carrasco, and Henrik Johanssen at...


Word of the Day
call-note
  • The call or cry of a bird or other animal to its mate or its young.
'Call-note' is newer than 'bird-call,' which originally referred to 'an instrument for imitating the note of birds' but now also refers to 'the song or cry of a bird.'
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