Work fluctuations for a harmonically confined Active Ornstein-Uhlenbeck Particle

2023/02/24 by Massimiliano Semeraro, Giuseppe Gonnella, Semeraro, Massimiliano +5 · 2 citations
Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Computational Physics (physics.comp-ph) #FOS: Physical sciences #Mathematical Physics (math-ph) #Micro and Nano Robotics #Quantum Electrodynamics and Casimir Effect #Statistical Mechanics (cond-mat.stat-mech)

paper · pdf · doi:10.48550/arxiv.2302.12535

openalex publication_date 2023/02/24 · openalex created_date 2023/03/01 · openalex updated_date 2026/07/28

Abstract

We study the active work fluctuations of an active Ornstein-Uhlenbeck particle in the presence of a confining harmonic potential. We tackle the problem analytically both for stationary and generic uncorrelated initial states. Our results show that harmonic confinement can induce singularities in the active work rate function, with linear stretches at large positive and negative active work, at sufficiently large active and harmonic force constants. These singularities originate from big jumps in the displacement and in the active force, occurring at the initial or ending points of trajectories and marking the relevance of boundary terms in this problem.

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