Three-wave nonlinear coupling among spatial Fourier modes of density and magnetic fluctuations is directly measured in a magnetically confined toroidal plasma. Density fluctuations are observed to gain (lose) energy from (to) either equilibrium or fluctuating fields depending on the mode number. Experiments indicate that nonlinear interactions alter the phase relation between density and magnet...

We have studied the effects of density fluctuations on supernova neutrinos for a 2ν system from a future galactic supernova. A wide range of density fluctuation levels have been considered and it has been shown that for the most recent neutrino parameter space constraints, density fluctuations would affect the neutrino survival prbability and the expected neutrino flux. Possible implications of...

Plastic deformation mediated by collective dislocation dynamics is investigated in the two-dimensional phase-field crystal model of sheared single crystals. We find that intermittent fluctuations in the dislocation population number accompany bursts in the plastic strain-rate fluctuations. Dislocation number fluctuations exhibit a power-law spectral density 1/f2 at high frequencies f. The proba...