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Bimodal response in periodically driven diffusive systems.

Urna Basu¹, Debasish Chaudhuri, P K Mohanty

¹TCMP Division, Saha Institute of Nuclear Physics, 1/AF Bidhan Nagar, Kolkata 700064, India. urna.basu@saha.ac.in

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|April 27, 2011

Summary

This summary is machine-generated.

We investigated how one-dimensional diffusive systems respond to periodic driving. A frequency-dependent crossover in particle behavior was observed, transitioning between short and long wavelength modes.

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Area of Science:

Statistical mechanics
Condensed matter physics
Non-equilibrium systems

Background:

Diffusive systems with particle interactions are fundamental in physics.
Understanding their response to external driving is crucial for non-equilibrium statistical mechanics.
Exclusion processes model various physical phenomena, including transport and phase transitions.

Purpose of the Study:

To analyze the dynamical response of 1D diffusive systems to time-periodic driving.
To characterize the system's behavior using the structure factor.
To investigate the frequency-dependent crossover phenomena in driven diffusive systems.

Main Methods:

Simulations of one-dimensional diffusive systems with symmetric or asymmetric exclusion.
Analysis of the system's dynamical response via the structure factor.
Analytical calculations to determine the behavior's universality.

Main Results:

Observed a frequency-dependent crossover in the system's dynamical response.
Identified a transition between short and long wavelength modes for current-carrying majority excitons.
Found that this boundary-driven effect decays inversely with system size.

Conclusions:

The observed crossover behavior is a general feature of diffusive systems.
This phenomenon is present regardless of particle correlations.
Boundary driving significantly influences the collective behavior of 1D diffusive systems.