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SUMMARY:How storm develops as the wind blows - Gregory Falkovich (Weizmann
  Institute of Science)
DTSTART:20240325T144000Z
DTEND:20240325T153000Z
UID:TALK208618@talks.cam.ac.uk
DESCRIPTION:I will describe an attempt to describe wave turbulence using t
 he methods of quantum field theory. We consider waves that interact via fo
 ur-wave scattering (such as sea waves\, plasma waves\, spin waves\, and ma
 ny others). By summing the series of the most UV-divergent terms in the pe
 rturbation theory\, we show that the true dimensionless coupling is differ
 ent from the naive estimate\, and find that the effective interaction eith
 er decays or grows explosively with the cascade extent\, depending on the 
 sign of the new coupling. The explosive growth possibly signals the appear
 ance of a multi-wave bound state (solitons\, shocks\, cusps) similar to co
 nfinement in quantum chromodynamics. We find that IR divergence in the eff
 ective coupling could be responsible for an anomalous scaling in wave turb
 ulence.
LOCATION:Seminar Room 1\, Newton Institute
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