Discontinuity in the distribution of field increments between avalanches in non-abelian random field Blume-Emery-Griffiths model with no passing violation

Abstract: We study the zero-temperature quasi-statically driven dynamics of the random field Blume-Emery-Griffiths model (RFBEGM) as a prototype for disordered systems with competing interactions. While the random field Ising model is known to obey the no-passing rule we show that this property is generically violated in the RFBEGM. By exploring the full parameter space, we identify the precise conditions under which no-passing is broken, particularly in the regime where a repulsive biquadratic coupling introduces frustration. Here, we find that this violation leaves a clear fingerprint in the form of a discontinuity in the distribution of the field increments between successive avalanches. We provide analytical arguments that locate the onset of this discontinuity, in excellent agreement with numerical simulations.