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Generation of virtual potentials by controlled feedback in electric circuit systems
Hsin Chang1, Kuan-Hsun Chiang1, Yonggun Jun1
1Department of Physics and Center for Complex Systems, National Central University, Zhongli 32001, Taiwan.
Physical Review. E
|May 19, 2021
Summary
Researchers created tunable potentials in electric circuits to study Brownian dynamics, offering a programmable method for stochastic thermodynamics research. This circuit-based approach mimics real potentials for thermal noise, proving effective and convenient.
Area of Science:
- Physics
- Thermodynamics
- Electrical Engineering
Background:
- Electric circuits with thermal noise exhibit Brownian dynamics, similar to confined particles.
- Stochastic thermodynamics studies systems with inherent randomness.
- Studying these phenomena often requires specialized or complex setups.
Purpose of the Study:
- To demonstrate a technique for generating tunable potentials in electric circuits for Brownian dynamics.
- To explore the use of controlled feedback for creating virtual potentials.
- To establish electric circuits as a programmable platform for stochastic thermodynamics.
Main Methods:
- Experimental demonstration of tunable potential generation using external feedback control.
- Implementation of one-dimensional virtual potentials: static harmonic and time-varying double-well.
- Analysis of thermal noise behavior under these virtual potentials.
Main Results:
- Successfully generated tunable virtual potentials in an electric circuit.
- Observed that thermal noise exhibits Brownian dynamics equivalent to authentic potentials.
- Confirmed the effectiveness of fast feedback in mimicking designed potentials.
Conclusions:
- Electric circuits offer a simple, effective, and programmable method for studying feedback-controlled virtual potentials.
- This technique provides a convenient alternative for investigating stochastic thermodynamics.
- The circuit-based approach allows for versatile manipulation of Brownian dynamics.
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