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Optimum transport in systems with time-dependent drive and short-ranged interactions
Deepsikha Das1, Punyabrata Pradhan1, Sakuntala Chatterjee1
1Physics of Complex Systems, S.N. Bose National Centre for Basic Sciences Block-JD, Sector-III, Salt Lake, Kolkata 700106, India.
Repulsive interactions enhance particle transport in lattice gas models, with optimal conditions depending on particle density and external driving forces. Strong repulsion is best for high densities, while weaker repulsion is optimal for low densities.
Area of Science:
- Statistical Mechanics
- Condensed Matter Physics
Background:
- Lattice gas models are used to study particle transport phenomena.
- Understanding particle interactions is crucial for optimizing transport properties.
Purpose of the Study:
- To investigate the effect of attractive and repulsive interactions on particle transport in a 1D lattice gas.
- To determine conditions for optimal particle transport (maximum DC current).
Main Methods:
- Mean-field calculations
- Numerical simulations of a 1D lattice gas model with hardcore particles and nearest-neighbor interactions in a time-periodic external potential.
Main Results:
- Attractive interactions hinder particle transport.
- Repulsive interactions generally enhance particle transport.
- Optimal transport conditions vary with particle density and the magnitude of diffusive current.
Conclusions:
- Particle transport is optimized by repulsive interactions, with the degree of repulsion depending on particle density.
- The interplay between externally driven current and diffusive current dictates optimal transport conditions.
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