Anomalous phase diagram of the elastic interface with non-local hydrodynamic interactions in the presence of quench disorder

Abstract: We investigate the influence of quenched disorder on the steady states of driven systems of the elastic interface with non-local hydrodynamic interactions. The generalized elastic model (GEM), which has been used to characterize numerous physical systems such as polymers, membranes, single-file systems, rough interfaces, and fluctuating surfaces, is a standard approach to studying the dynamics of elastic interfaces with non-local hydrodynamic interactions. The criticality and phase transition of the quenched generalized elastic model (qGEM) are investigated numerically, and the results are presented in a phase diagram spanned by two tuning parameters. We demonstrate that in 1-d disordered driven GEM, three qualitatively different behavior regimes are possible with a proper specification of the order parameter (mean velocity) for this system. In the vanishing order parameter regime, the steady-state order parameter approaches zero in the thermodynamic limit. A system with a non-zero mean velocity can be in either the continuous regime, which is characterized by a second-order phase transition, or the discontinuous regime, which is characterized by a first-order phase transition. The focus of this research was to investigate at the critical scaling features near the pinning-depinning threshold. The behavior of the quenched generalized elastic model at the critical depinning force is explored. Near the depinning threshold, the critical exponent obtained numerically.