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Related Experiment Video

Updated: Jun 14, 2026

Recombination Dynamics in Thin-film Photovoltaic Materials via Time-resolved Microwave Conductivity

Recombination Dynamics in Thin-film Photovoltaic Materials via Time-resolved Microwave Conductivity

Published on: March 6, 2017

Negative mobility induced by colored thermal fluctuations.

M Kostur¹, J Luczka, P Hänggi

¹Institute of Physics, University of Silesia, 40-007 Katowice, Poland.

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

|April 7, 2010

Summary

Non-Markovian thermal fluctuations in Brownian particle dynamics can lead to anomalous transport, including absolute negative mobility. Nonzero correlation times significantly influence these transport regimes, inducing negative differential and nonlinear mobility.

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Trapping of Micro Particles in Nanoplasmonic Optical Lattice

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Last Updated: Jun 14, 2026

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Trapping of Micro Particles in Nanoplasmonic Optical Lattice

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Published on: September 5, 2017

Area of Science:

Physics
Statistical Mechanics
Complex Systems

Background:

Brownian particle dynamics in periodic systems are crucial for understanding transport phenomena.
Non-Markovian effects and thermal fluctuations introduce complexities beyond classical models.
Anomalous transport, such as negative mobility, challenges conventional understanding of particle movement.

Purpose of the Study:

To numerically investigate anomalous transport in non-Markovian Brownian dynamics.
To explore the impact of thermal fluctuation correlation time on negative mobility.
To identify conditions for absolute negative mobility (ANM), nonlinear negative mobility (NNM), and negative differential mobility (NDM).

Main Methods:

Modeling Brownian dynamics using a generalized Langevin equation.
Incorporating exponentially correlated Gaussian thermal noise.
Numerical simulations to analyze transport under time-periodic driving and constant bias.

Main Results:

Nonzero thermal correlation time can enhance or diminish absolute negative mobility (ANM).
Finite thermal noise correlation can induce negative differential mobility (NDM) and nonlinear negative mobility (NNM) where absent for white noise.
Complex structures of negative mobility regions (islands, tongues) were observed, with some robust to temperature changes.

Conclusions:

Thermal fluctuation memory is critical for observing anomalous transport phenomena like negative mobility.
The study reveals intricate parameter dependencies for negative mobility regimes.
Understanding these non-Markovian effects is key for controlling and predicting particle transport in driven systems.