5 papers
Sample-specific rectification-like response in a boundary-driven exclusion process
Issei Sakai, Takuma Akimoto
We investigate the current response of a boundary-driven symmetric exclusion process with quenched site disorder. Hard-core particles hop symmetrically on a one-dimensional lattice…
Breakdown of Linear Response Induced by Velocity-Dependent Stochastic Resetting
Yuto Takeishi, Takuma Akimoto
Linear response theory lies at the foundation of transport phenomena, predicting that physical systems respond proportionally to weak external forces. Here we show that this princi…
Observation-Time-Induced Crossover in Driven Anomalous Transport
Masahiro Shirataki, Takuma Akimoto
We investigate how a weak constant force becomes detectable through fluctuations in anomalous transport in strongly heterogeneous media. Rather than focusing on the mean drift, we…
Symmetry Breaking of Current Response in Disordered Exclusion Processes
Issei Sakai, Takuma Akimoto
The bias-reversal symmetry -- where reversing an external bias inverts the current without changing its magnitude -- is a hallmark of nonequilibrium transport. While this property…
Density-Independent transient caging in the high-density phase of motility-induced phase separation
Toranosuke Umemura, Issei Sakai, Takuma Akimoto
We investigate the nonequilibrium dynamics of active matter using a two-dimensional active Brownian particles model. In these systems, self-propelled particles undergo motility-ind…