2016/05/03 by Subhadip Chakraborti, Shradha Mishra, Punyabrata Pradhan · 1 citation
Engineering · Mathematics · Physics and Astronomy · #Additive function #Advanced Thermodynamics and Statistical Mechanics #Binodal #Brownian motion #Classical mechanics #Criticality #Homogeneous #Mathematics #Micro and Nano Robotics #Molecular Communication and Nanonetworks #Non-equilibrium thermodynamics #Particle (ecology) #Phase (matter) #Phase diagram #Phase transition #Physics #Quantum mechanics #Statistical physics #Thermodynamics #cond-mat.stat-mech
paper · pdf · doi:10.1103/physreve.93.052606
published as Phys. Rev. E 93, 052606 (2016) · 13 pages, 5 figures
arxiv created 2016/05/03 · openalex publication_date 2016/05/12 · arxiv updated 2016/05/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Using an additivity property, we study particle-number fluctuations in a system of interacting self-propelled particles, called active Brownian particles (ABPs), which consists of repulsive disks with random self-propulsion velocities. From a fluctuation-response relation, a direct consequence of additivity, we formulate a thermodynamic theory which captures the previously observed features of nonequilibrium phase transition in the ABPs from a homogeneous fluid phase to an inhomogeneous phase of coexisting gas and liquid. We substantiate the predictions of additivity by analytically calculating the subsystem particle-number distributions in the homogeneous fluid phase away from criticality where analytically obtained distributions are compatible with simulations in the ABPs.