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Optimizing Work Extraction in the Presence of an Entropic Potential: An Entropic Stochastic Resonance
Syed Yunus Ali1, Prashanta Bauri1, Debasish Mondal1
1Department of Chemistry and Center for Atomic, Molecular, and Optical Sciences & Technologies, Indian Institute of Technology Tirupati, Yerpedu 517619, Andhra Pradesh, India.
The Journal of Physical Chemistry. B
|April 15, 2024
Summary
This study reveals how irregular confinement in Brownian systems creates an entropic bistable potential. Optimal thermal noise and driving frequency show resonance-like behavior in work and heat, demonstrating entropy
Area of Science:
- Statistical Mechanics
- Nonlinear Dynamics
- Soft Matter Physics
Background:
- Brownian systems exhibit complex thermodynamic responses under external driving forces.
- Particle confinement in irregular structures can lead to effective entropic potentials.
- Understanding stochastic resonance is crucial for energy harvesting and information processing.
Purpose of the Study:
- To investigate the thermodynamic responses of an overdamped Brownian system within a bilobal irregular confinement.
- To analyze the influence of an effective entropic bistable potential on system dynamics.
- To explore conditions for resonance-like phenomena and entropy dominance.
Main Methods:
- Calculation of thermodynamic response functions using averaged work and absorbed heat over a driving cycle.
- Modeling an overdamped Brownian system with spatial irregularity leading to an entropic bistable potential.
- Analysis of the interplay between nonlinearity, driving frequency, and thermal fluctuations.
Main Results:
- Thermodynamic responses are significantly influenced by the effective entropic potential's nonlinearity, driving frequency, and thermal fluctuations.
- A resonance-like behavior in output work and absorbed heat is observed at optimal thermal noise and driving frequency.
- Conditions for synchronized work extraction and heat absorption were identified as quantifiers for entropic stochastic resonance.
Conclusions:
- The study demonstrates a nontrivial thermodynamic response in Brownian systems due to irregular confinement.
- Entropic stochastic resonance can be quantified by synchronized work extraction and heat absorption.
- Entropy-driven processes can outperform energy-driven scenarios in terms of output work.
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