10 papers
Memory with Onsager-Casimir symmetry: Rotating particle in a viscoelastic fluid
Debankur Das, Niloyendu Roy, Niklas Windbacher +2
We study the stochastic dynamics of a rotating Brownian particle in a non-Markovian fluid. Experimentally, we find that rotation enhances the long-time diffusivity of the particle…
Bath-modes quantitatively capture the nonlinear microrheology of micellar solutions
Pierre Champagnac, Clemens Bechinger, Juliana Caspers +3
Active microrheology experiments, in which a probe is driven through a complex fluid, often exhibit nonlinear responses that cannot be captured by generalized Langevin equations. M…
Work Extraction via Backward Motion in Optimal Closed-Loop Stochastic Control
Luis Frieder Reinalter, Emanuele Panizon, Lokesh Muruga +1
We experimentally realize finite-time feedback control in an overdamped colloidal system using real-time optical tweezers with in situ reinforcement learning (RL). By varying the p…
Finite-time transitions in optimal control and non-equilibrium relaxation
Jan Meibohm, Samuel Monter, Sarah A. M. Loos +1
We theoretically and experimentally study finite-time optimal control of a colloidal particle steered through a spatially inhomogeneous environment, modeled by a position-dependent…
Energy-Efficient Control of Interacting Microscopic Systems: When Longer Paths Save Energy
Samuel Monter, Lars T. Stutzer, Sarah A. M. Loos +1
We experimentally and theoretically study the thermodynamically optimal control of interacting multiple-particle systems, focusing on collections of colloidal particles individuall…
Extracting work from hidden degrees of freedom
Lokesh Muruga, Felix Ginot, Sarah A. M. Loos +1
Thermodynamics establishes that information acquired through measurement can be converted into work, as exemplified by Maxwell's demon and Szilard engines. Most experimental realiz…