2020/03/10 by Aritra De, Christopher Plumberg, Joseph I. Kapusta
Physics and Astronomy · #Atomic physics #Charge (physics) #Computer science #Cosmology and Gravitation Theories #Diffusion #Heavy ion #High-Energy Particle Collisions Research #Ion #Nuclear physics #Physics #Quantum Chromodynamics and Particle Interactions #Quantum electrodynamics #Quantum mechanics #Self consistent #Self-diffusion #Statistical physics #nucl-th
paper · pdf · doi:10.1103/physrevc.102.024905
published as Phys. Rev. C 102, 024905 (2020) · 26 pages, 24 figures
arxiv created 2020/03/10 · openalex publication_date 2020/08/07 · arxiv updated 2020/08/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We study the propagation and diffusion of electric charge fluctuations in the Bjorken hydrodynamic model with both white and Catteneo noise using purely numerical methods. We show that a lattice of noise fluctuations is required to fully calculate the two-point correlators of charge. We introduce a numerical procedure to solve the stochastic differential equations that arise from the charge conservation equation on the lattice event by event. We explicitly identify the self-correlation term in the case of Catteneo noise and provide a physical interpretation. We provide a numerical recipe to remove this contribution from the full two-point correlators. Finally, we calculate the balance functions for charged hadrons. By limiting the speed of signal propagation, we observe the expected narrowing of the balance functions after removing the self-correlations.