2014/04/30 by V. A. De Lorenci, E. S. Moreira, E. S. Moreira Jr. +1
Physics and Astronomy · #Cold Atom Physics and Bose-Einstein Condensates #Quantum Electrodynamics and Casimir Effect #Quantum Mechanics and Applications #hep-th #quant-ph
paper · pdf · doi:10.1103/physrevd.90.027702
published as Physical Review D 90, 027702 (2014) · 9 pages, 3 figures, published version
openalex publication_date 2014/07/01 · arxiv created 2014/07/07 · arxiv updated 2014/09/02 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The Brownian motion of a test particle interacting with a quantum scalar field in the presence of a perfectly reflecting boundary is studied in (1+1)-dimensional flat spacetime. Particularly, the expressions for dispersions in velocity and position of the particle are explicitly derived and their behaviors examined. The results are similar to those corresponding to an electric charge interacting with a quantum electromagnetic field near a reflecting plane boundary, mainly regarding the divergent behavior of the dispersions at the origin (where the boundary is placed), and at the time interval corresponding to a round trip of a light pulse between the particle and the boundary. We close by addressing some effects of allowing the position of the particle to fluctuate.