Topological defects after a quench in a Benard-Marangoni convection system- art. no. 057301

We report experimental evidence of the fact that, in a Benard-Marangoni con duction-convection transition, the density of defects in the emerging struc ture scales as a power law in the quench time needed for the control parame ter to ramp through the threshold. The obtained scaling exponents differ fr om the ones predicted and observed in the case in which the defects corresp ond to zeros in the amplitude of the global two-dimensional field.