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SUMMARY:Resonances on asymptotically flat spacetimes - Dejan Gajic (Univer
 sity of Cambridge)
DTSTART:20200226T160000Z
DTEND:20200226T170000Z
UID:TALK139087@talks.cam.ac.uk
CONTACT:Renato Velozo
DESCRIPTION:A fundamental problem in the context of Einstein's equations o
 f general relativity is to understand precisely the dynamical evolution of
  small perturbations of stationary asymptotically flat spacetimes. It is e
 xpected that there is a discrete set of characteristic complex frequencies
  that play a dominant role at late time intervals and carry information ab
 out the nature of the stationary spacetime\, much like the natural frequen
 cies of a vibrating string. These frequencies are called resonances or qua
 sinormal frequencies. I will discuss a new approach that characterizes res
 onances as genuine eigenvalues of time evolution operators. This is joint 
 work with Claude Warnick.
LOCATION:MR14\, Centre for Mathematical Sciences
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